January 28, 2019
  Class A
Shares
Ticker
Class C
Shares
Ticker
Class S
Shares
Ticker
Class I
Shares
Ticker
Class N
Shares
Ticker
Class R
Shares
Ticker
Class T
Shares
Ticker
Multi-Asset U.S. Equity              
Janus Henderson Balanced Fund

JDBAX JABCX JABRX JBALX JABNX JDBRX JABAX
Janus Henderson Contrarian Fund

JCNAX JCNCX JCNIX JCONX JCNNX JCNRX JSVAX
Janus Henderson Enterprise Fund

JDMAX JGRCX JGRTX JMGRX JDMNX JDMRX JAENX
Janus Henderson Forty Fund

JDCAX JACCX JARTX JCAPX JFRNX JDCRX JACTX
Janus Henderson Growth and Income Fund

JDNAX JGICX JADGX JGINX JDNNX JDNRX JAGIX
Janus Henderson Research Fund

JRAAX JRACX JRASX JRAIX JRANX JRARX JAMRX
Janus Henderson Triton Fund

JGMAX JGMCX JGMIX JSMGX JGMNX JGMRX JATTX
Janus Henderson U.S. Growth Opportunities Fund

HGRAX HGRCX HGRSX HGRIX HGRRX N/A HGRTX
Janus Henderson Venture Fund

JVTAX JVTCX JVTSX JVTIX JVTNX N/A JAVTX
  
Janus Investment Fund
Prospectus
The Fund is closed to certain new investors. Refer to the “Shareholder’s Guide” section of this Prospectus for more details.
The Securities and Exchange Commission has not approved or disapproved of these securities or passed on the accuracy or adequacy of this Prospectus. Any representation to the contrary is a criminal offense.
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of a Fund’s shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports from the Fund or your plan sponsor, broker-dealer, or financial intermediary, or if you invest directly with the Fund, by contacting a Janus Henderson representative. Instead, the reports will be made available on a website, and you will be notified by mail each time a report is posted and provided with a website link to access the report.
If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from a Fund electronically by contacting your plan sponsor, broker-dealer, or financial intermediary, or if you invest directly with the Fund, by visiting janushenderson.com/edelivery.
You may elect to receive all future reports in paper free of charge. If you do not invest directly with a Fund, you should contact your plan sponsor, broker-dealer, or financial intermediary, to request to continue receiving paper copies of your shareholder reports. If you invest directly with a Fund, you can call 1-800-525-3713 to let the Fund know that you wish to continue receiving paper copies of your shareholder reports. Your election to receive reports in paper will apply to all Janus Henderson mutual funds where held (i.e., all Janus Henderson mutual funds held in your account if you invest through your financial intermediary or all Janus Henderson mutual funds held with the fund complex if you invest directly with a fund).

This Prospectus describes nine portfolios (each, a “Fund” and collectively, the “Funds”) of Janus Investment Fund (the “Trust”). Janus Capital Management LLC (“Janus Capital”) serves as investment adviser to each Fund. Janus Henderson U.S. Growth Opportunities Fund is subadvised by Geneva Capital Management Ltd. (“Geneva”).
The Funds offer multiple classes of shares in order to meet the needs of various types of investors. Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class N Shares, Class R Shares, and Class T Shares (individually and/or collectively, the “Shares”) are offered by this Prospectus.
The Shares are not offered directly to individual investors. Certain financial intermediaries may not offer all classes of Shares. For additional information about these classes of Shares and whether or not you are eligible to purchase these Shares, please refer to the Shareholder’s Guide section of the Prospectus.

Table of contents

Fund summary  

2

10

17

23

30

37

44

51

58
Additional information about the Funds  

64

65

70
Management of the Funds  

81

81

84

85

89

90
Shareholder’s guide  

94

95

97

98

100

104

105

109

111

112

173

176
1  Janus Investment Fund

Fund summary

Janus Henderson Balanced Fund
Ticker: JDBAX Class A Shares JABRX Class S Shares JABNX Class N Shares JABAX Class T Shares
  JABCX Class C Shares JBALX Class I Shares JDBRX Class R Shares    
    
INVESTMENT OBJECTIVE
Janus Henderson Balanced Fund seeks long-term capital growth, consistent with preservation of capital and balanced by current income.
FEES AND EXPENSES OF THE FUND
This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund. For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus Henderson mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 100 of the Fund’s Prospectus and in the “Purchases” section on page 85 of the Fund’s Statement of Additional Information. In addition, please see Appendix A – Intermediary Sales Charge Waivers and Discounts. You may also incur brokerage commissions charged by your broker or financial intermediary when buying Class I Shares or Class N Shares of the Fund that are not reflected in the table or in the example below.
SHAREHOLDER FEES
(fees paid directly from your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)   5.75%   None   None   None   None   None   None
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)   None   1.00%   None   None   None   None   None
  
    
ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Management Fees   0.55%   0.55%   0.55%   0.55%   0.55%   0.55%   0.55%
Distribution/Service (12b-1) Fees   0.25%   1.00%   0.25%   None   None   0.50%   None
Other Expenses   0.15%   0.09%   0.27%   0.09%   0.02%   0.27%   0.27%
Total Annual Fund Operating Expenses   0.95%   1.64%   1.07%   0.64%   0.57%   1.32%   0.82%
  
EXAMPLE:
The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
If Shares are redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 666 $ 860 $ 1,070 $ 1,674
Class C Shares $ 267 $ 517 $  892 $ 1,944
Class S Shares $ 109 $ 340 $  590 $ 1,306
Class I Shares $  65 $ 205 $  357 $  798
Class N Shares $  58 $ 183 $  318 $  714
Class R Shares $ 134 $ 418 $  723 $ 1,590
Class T Shares $  84 $ 262 $  455 $ 1,014
  
    
2  Janus Henderson Balanced Fund

If Shares are not redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 666 $ 860 $ 1,070 $ 1,674
Class C Shares $ 167 $ 517 $  892 $ 1,944
Class S Shares $ 109 $ 340 $  590 $ 1,306
Class I Shares $  65 $ 205 $  357 $  798
Class N Shares $  58 $ 183 $  318 $  714
Class R Shares $ 134 $ 418 $  723 $ 1,590
Class T Shares $  84 $ 262 $  455 $ 1,014
  
Portfolio Turnover:  The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 88% of the average value of its portfolio.
PRINCIPAL INVESTMENT STRATEGIES
The Fund pursues its investment objective by normally investing 35-65% of its assets in equity securities and the remaining assets in fixed-income securities and cash equivalents. The Fund normally invests at least 25% of its assets in fixed-income senior securities. The Fund’s fixed-income investments may reflect a broad range of credit qualities and may include corporate debt securities, U.S. Government obligations, non-U.S. government securities, mortgage-backed securities and other mortgage-related products, and short-term securities. In addition, the Fund may invest up to 35% of its net assets in high-yield/high-risk bonds, also known as “junk” bonds. The Fund may enter into “to be announced” or “TBA” commitments when purchasing mortgage-backed securities or other securities. The Fund may also invest in foreign securities, which may include investments in emerging markets. As of September 30, 2018, approximately 61.1% of the Fund’s assets were held in equity securities, including common stocks and preferred stocks and 38.5% of the Fund’s assets were held in fixed-income securities and cash equivalents.
In choosing investments for the Fund, the portfolio managers apply a “bottom up” approach with two portfolio managers focusing on the equity portion of the Fund and the other portfolio managers focusing on the fixed-income portion of the Fund. With respect to corporate issuers, the portfolio managers look at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies. The portfolio managers may also consider economic factors, such as the effect of interest rates on certain of the Fund’s fixed-income investments. The portfolio managers share day-to-day responsibility for the Fund’s investments.
The Fund may also invest its assets in derivatives, which are instruments that have a value derived from, or directly linked to, an underlying asset, such as equity securities, fixed-income securities, commodities, currencies, interest rates, or market indices. In particular, the Fund may use forward currency contracts to offset risks associated with an investment, currency exposure, or market conditions and may use futures, including Treasury futures, to hedge the Fund’s interest rate exposure.
PRINCIPAL INVESTMENT RISKS
The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking a balanced portfolio, including common stocks and bonds. Common stocks tend to be more volatile than many other investment choices.
Market Risk.  The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio managers’ belief about a company’s intrinsic worth is incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. Market risk may affect a single issuer, industry, economic sector, or the market as a whole.
Growth Securities Risk.  The Fund invests in companies that the portfolio managers believe have growth potential. Securities of companies perceived to be “growth” companies may be more volatile than other stocks and may involve special risks. If the portfolio managers’ perception of a company’s growth potential is not realized, the securities purchased may not perform
3  Janus Henderson Balanced Fund

as expected, reducing the Fund’s returns. In addition, because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “growth” stocks may perform differently from the market as a whole and other types of securities.
Dividend-Oriented Stocks Risk.  Companies that have paid regular dividends to shareholders may decrease or eliminate dividend payments in the future. A decrease in dividend payments by an issuer may result in a decrease in the value of the security held by the Fund or the Fund receiving less income.
Fixed-Income Securities Risk.  The Fund holds debt and other fixed-income securities. Typically, the values of fixed-income securities change inversely with prevailing interest rates. Therefore, a fundamental risk of fixed-income securities is interest rate risk, which is the risk that the value of such securities will generally decline as prevailing interest rates rise, which may cause the Fund’s net asset value to likewise decrease. For example, while securities with longer maturities and durations tend to produce higher yields, they also tend to be more sensitive to changes in prevailing interest rates and are therefore more volatile than shorter-term securities and are subject to greater market fluctuations as a result of changes in interest rates. Investments in fixed-income securities with very low or negative interest rates may diminish the Fund’s yield and performance. The Fund may be subject to heightened interest rate risk because the Federal Reserve has ended its monetary stimulus program known as quantitative easing and interest rates are near historically low levels. The Federal Reserve raised the federal funds rate several times in recent periods and has signaled additional increases in the near future. To the extent the Federal Reserve continues to raise rates, there is a risk that the fixed-income markets will experience increased volatility and that the liquidity of certain Fund investments may be reduced. These developments could cause the Fund’s net asset value to fluctuate or make it more difficult for the Fund to accurately value its securities. These developments or others also could cause the Fund to face increased shareholder redemptions, which may lead to increased portfolio turnover and transaction costs, or could force the Fund to liquidate investments at disadvantageous times or prices, therefore adversely affecting the Fund as well as the value of your investment. The amount of assets deemed illiquid remaining within the Fund may also increase, making it more difficult to meet shareholder redemptions and further adversely affecting the value of the Fund. How specific fixed-income securities may react to changes in interest rates will depend on the specific characteristics of each security. Fixed-income securities are also subject to credit risk, prepayment risk, valuation risk, extension risk, and liquidity risk. Credit risk is the risk that the credit strength of an issuer of a fixed-income security will weaken and/or that the issuer will be unable to make timely principal and interest payments and that the security may go into default. Prepayment risk is the risk that during periods of falling interest rates, certain fixed-income securities with higher interest rates, such as mortgage- and asset-backed securities, may be prepaid by their issuers thereby reducing the amount of interest payments. Valuation risk is the risk that one or more of the fixed-income securities in which the Fund invests are priced differently than the value realized upon such security’s sale. In times of market instability, valuation may be more difficult. Extension risk is the risk that borrowers may pay off their debt obligations more slowly in times of rising interest rates, which will lengthen the duration of the portfolio. Liquidity risk is the risk that fixed-income securities may be difficult or impossible to sell at the time that the portfolio managers would like or at the price the portfolio managers believe the security is currently worth.
Sovereign Debt Risk.  The Fund may invest in U.S. and non-U.S. government debt securities (“sovereign debt”). Some investments in sovereign debt, such as U.S. sovereign debt, are considered low risk. However, investments in sovereign debt, especially the debt of less developed countries, can involve a high degree of risk, including the risk that the governmental entity that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or to pay the interest on its sovereign debt in a timely manner. A sovereign debtor’s willingness or ability to satisfy its debt obligation may be affected by various factors including, but not limited to, its cash flow situation, the extent of its foreign currency reserves, the availability of foreign exchange when a payment is due, and the relative size of its debt position in relation to its economy as a whole. In the event of default, there may be limited or no legal remedies for collecting sovereign debt and there may be no bankruptcy proceedings through which the Fund may collect all or part of the sovereign debt that a governmental entity has not repaid. In addition, to the extent the Fund invests in non-U.S. sovereign debt, it may be subject to currency risk.
Mortgage- and Asset-Backed Securities Risk.  Mortgage- and asset-backed securities represent interests in “pools” of commercial or residential mortgages or other assets, including consumer loans or receivables. Mortgage- and asset-backed securities tend to be more sensitive to changes in interest rates than other types of debt securities. Investments in mortgage- and asset-backed securities are subject to both extension risk, where borrowers pay off their debt obligations more slowly in times of rising interest rates, and prepayment risk, where borrowers pay off their debt obligations sooner than expected in
4  Janus Henderson Balanced Fund

times of declining interest rates. These risks may reduce the Fund’s returns. In addition, investments in mortgage- and asset-backed securities, including those comprised of subprime mortgages, may be subject to a higher degree of credit risk, valuation risk, and liquidity risk than various other types of fixed-income securities.
Foreign Exposure Risk.  The Fund may have exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. To the extent the Fund invests in foreign debt securities, such investments are sensitive to changes in interest rates. Additionally, investments in securities of foreign governments involve the risk that a foreign government may not be willing or able to pay interest or repay principal when due. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.
High-Yield/High-Risk Bond Risk.  High-yield/high-risk bonds are considered speculative and may be more sensitive than other types of bonds to economic changes, political changes, or adverse developments specific to the company that issued the bond, which may adversely affect their value.
TBA Commitments Risk.  The Fund may enter into “to be announced” or “TBA” commitments. Although the particular TBA securities must meet industry-accepted “good delivery” standards, there can be no assurance that a security purchased on a forward commitment basis will ultimately be issued or delivered by the counterparty. During the settlement period, the Fund will still bear the risk of any decline in the value of the security to be delivered. Because TBA commitments do not require the purchase and sale of identical securities, the characteristics of the security delivered to the Fund may be less favorable than the security delivered to the dealer. If the counterparty to a transaction fails to deliver the securities, the Fund could suffer a loss. At the time of its acquisition, a TBA security may be valued at less than the purchase price.
Derivatives Risk.  Derivatives can be highly volatile and involve risks in addition to the risks of the underlying referenced securities or asset. Gains or losses from a derivative investment can be substantially greater than the derivative’s original cost, and can therefore involve leverage. Leverage may cause the Fund to be more volatile than if it had not used leverage. Derivatives can be less liquid than other types of investments and entail the risk that the counterparty will default on its payment obligations. The Fund may use derivatives, including forward currency contracts, for hedging purposes. Hedging with derivatives may increase expenses, and there is no guarantee that a hedging strategy will work. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains or cause losses if the market moves in a manner different from that anticipated by the portfolio managers or if the cost of the derivative outweighs the benefit of the hedge.
Management Risk.  The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. The Fund may underperform its benchmark index or other mutual funds with similar investment objectives.
An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The following information provides some indication of the risks of investing in the Fund by showing how the Fund’s performance has varied over time. Class T Shares (formerly named Class J Shares, the initial share class) of the Fund commenced operations with the Fund’s inception. Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund commenced operations on July 6, 2009. Class N Shares of the Fund commenced operations on May 31, 2012.
The performance shown for Class T Shares is calculated using the fees and expenses of Class T Shares in effect during the periods shown, net of any applicable fee and expense limitations or waivers.
The performance shown for Class A Shares, Class C Shares, Class S Shares, and Class R Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of each respective share class, without the effect of any fee and expense limitations or waivers.
5  Janus Henderson Balanced Fund

The performance shown for Class I Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of Class J Shares, net of any applicable fee and expense limitations or waivers.
The performance shown for Class N Shares for periods prior to May 31, 2012, reflects the performance of the Fund’s Class T Shares, calculated using the fees and expenses of Class T Shares, net of any applicable fee and expense limitations or waivers.
If Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund had been available during periods prior to July 6, 2009, or Class N Shares of the Fund had been available during periods prior to May 31, 2012, the performance shown for each respective share class may have been different. The performance shown for the periods following the Fund’s commencement of Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class N Shares, and Class R Shares reflects the fees and expenses of each respective share class, net of any applicable fee and expense limitations or waivers.
The bar chart depicts the change in performance from year to year during the periods indicated. The bar chart figures do not include any applicable sales charges that an investor may pay when they buy or sell Class A Shares or Class C Shares of the Fund. If sales charges were included, the returns would be lower. The table compares the Fund’s average annual returns for the periods indicated to broad-based securities market indices. All figures assume reinvestment of dividends and distributions. For certain periods, the Fund’s performance reflects the effect of expense waivers. Without the effect of these expense waivers, the performance shown would have been lower.
The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. Updated performance information is available at janushenderson.com/performance or by calling 1-877-335-2687.
Annual Total Returns for Class T Shares (calendar year-end)

    
Best Quarter: 3rd Quarter 2009 10.97% Worst Quarter: 3rd Quarter 2011 – 11.05%
  
    
Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
(9/1/92)
Class T Shares        
Return Before Taxes 0.52% 6.24% 9.51% 9.41%
Return After Taxes on Distributions – 1.12% 4.75% 8.26% 7.93%
Return After Taxes on Distributions and Sale of Fund Shares(1) 1.35% 4.62% 7.56% 7.51%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
6  Janus Henderson Balanced Fund

Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
(9/1/92)
Class A Shares        
Return Before Taxes(2) – 5.39% 4.86% 8.74% 9.11%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
Class C Shares        
Return Before Taxes(3) – 1.25% 5.37% 8.56% 8.68%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
Class S Shares        
Return Before Taxes 0.26% 5.97% 9.22% 9.20%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
Class I Shares        
Return Before Taxes 0.70% 6.41% 9.51% 9.41%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
Class N Shares        
Return Before Taxes 0.76% 6.50% 9.51% 9.41%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
7  Janus Henderson Balanced Fund

Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
(9/1/92)
Class R Shares        
Return Before Taxes 0.03% 5.71% 8.93% 8.97%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 9.22%
Bloomberg Barclays U.S. Aggregate Bond Index
(reflects no deduction for expenses, fees, or taxes)
0.01% 2.52% 3.48% 5.24%
Balanced Index
(reflects no deduction for expenses, fees, or taxes)
– 2.12% 5.94% 8.88% 7.71%
  
(1) If the Fund incurs a loss, which generates a tax benefit, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Fund’s other return figures.
(2) Calculated assuming maximum permitted sales loads.
(3) The one year return is calculated to include the contingent deferred sales charge.
The Fund’s primary benchmark index is the S&P 500® Index. The Fund also compares its performance to the Bloomberg Barclays U.S. Aggregate Bond Index and the Balanced Index. The indices are described below.
The S&P 500® Index is a commonly recognized, market-capitalization weighted index of 500 widely held equity securities, designed to measure broad U.S. equity performance.
The Bloomberg Barclays U.S. Aggregate Bond Index is made up of the Bloomberg Barclays U.S. Government/Corporate Bond Index, Mortgage-Backed Securities Index, and Asset-Backed Securities Index, including securities that are of investment grade quality or better, have at least one year to maturity, and have an outstanding par value of at least $100 million.
The Balanced Index is an internally-calculated, hypothetical combination of unmanaged indices that combines total returns from the S&P 500® Index (55%) and the Bloomberg Barclays U.S. Aggregate Bond Index (45%).
After-tax returns are calculated using distributions for the Fund’s Class T Shares (formerly named Class J Shares, the initial share class). After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-advantaged account, such as a 401(k) plan or an IRA.
After-tax returns are only shown for Class T Shares of the Fund. After-tax returns for the other classes of Shares will vary from those shown for Class T Shares due to varying sales charges (as applicable), fees, and expenses among the classes.
MANAGEMENT
Investment Adviser:  Janus Capital Management LLC
Portfolio Managers:  Jeremiah Buckley, CFA, is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since December 2015. Marc Pinto, CFA, is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since May 2005. Mayur Saigal is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since December 2015. Darrell Watters is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since December 2015.
8  Janus Henderson Balanced Fund

PURCHASE AND SALE OF FUND SHARES
Minimum Investment Requirements*
Class A Shares, Class C Shares**, Class S Shares, Class R Shares, and Class T Shares  
Non-retirement accounts $ 2,500***
Certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class I Shares  
Through an intermediary institution  
• non-retirement accounts $ 2,500
• certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class N Shares  
Retirement investors (investing through an adviser-assisted, employer-sponsored retirement plan) None
Retail investors (investing through a financial intermediary omnibus account) $2,500****
Institutional investors (investing directly with the Fund) $ 1,000,000
  
* Exceptions to these minimums may apply for certain tax-advantaged, tax-qualified and retirement plans, accounts held through certain wrap programs, and certain retail brokerage accounts.
** The maximum purchase in Class C Shares is $500,000 for any single purchase.
*** Shareholders who invest through financial intermediaries with supermarket and/or self-directed brokerage platforms that maintain omnibus accounts and charge asset-based service fees may not be subject to this minimum. Please contact your financial intermediary for more information.
**** Investors in certain tax-advantaged accounts or accounts held through certain wrap programs may not be subject to this minimum.
Purchases, exchanges, and redemptions can generally be made only through institutional channels, such as financial intermediaries and retirement platforms. Class I Shares may be purchased directly by certain institutional investors who established Class I Shares accounts before August 4, 2017. You should contact your financial intermediary or refer to your plan documents for information on how to invest in the Fund. Requests must be received in good order by the Fund or its agents (financial intermediary or plan sponsor, if applicable) prior to the close of the regular trading session of the New York Stock Exchange in order to receive that day’s net asset value. For additional information, refer to “Purchases,” “Exchanges,” and/or “Redemptions” in the Prospectus.
Tax Information
The Fund’s distributions are taxable, and will be taxed as ordinary income or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account (in which case you may be taxed upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class R Shares, or Class T Shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment or to recommend one share class over another. There is some regulatory uncertainty concerning whether marketing support or other similar payments may be made or received in connection with Class I Shares where a financial intermediary has imposed its own sales charges or transaction fees. As a result, based on future regulatory developments, such payments may be terminated, or the Fund may prohibit financial intermediaries from imposing such sales charges or transaction fees in connection with Class I Shares. Ask your salesperson or visit your financial intermediary’s website for more information.
9  Janus Henderson Balanced Fund

Fund summary

Janus Henderson Contrarian Fund
Ticker: JCNAX Class A Shares JCNIX Class S Shares JCNNX Class N Shares JSVAX Class T Shares
  JCNCX Class C Shares JCONX Class I Shares JCNRX Class R Shares    
    
INVESTMENT OBJECTIVE
Janus Henderson Contrarian Fund seeks long-term growth of capital.
FEES AND EXPENSES OF THE FUND
This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund. For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus Henderson mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 100 of the Fund’s Prospectus and in the “Purchases” section on page 85 of the Fund’s Statement of Additional Information. In addition, please see Appendix A – Intermediary Sales Charge Waivers and Discounts. You may also incur brokerage commissions charged by your broker or financial intermediary when buying Class I Shares or Class N Shares of the Fund that are not reflected in the table or in the example below.
SHAREHOLDER FEES
(fees paid directly from your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)   5.75%   None   None   None   None   None   None
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)   None   1.00%   None   None   None   None   None
  
    
ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Management Fees (may adjust up or down)   0.47%   0.47%   0.47%   0.47%   0.47%   0.47%   0.47%
Distribution/Service (12b-1) Fees   0.25%   1.00%   0.25%   None   None   0.50%   None
Other Expenses   0.15%   0.13%   0.32%   0.10%   0.03%   0.50%   0.27%
Total Annual Fund Operating Expenses(1)   0.87%   1.60%   1.04%   0.57%   0.50%   1.47%   0.74%
Fee Waiver(1)   0.00%   0.00%   0.00%   0.00%   0.00%   0.05%   0.00%
Total Annual Fund Operating Expenses After Fee Waiver(1)   0.87%   1.60%   1.04%   0.57%   0.50%   1.42%   0.74%
  
(1) Janus Capital has contractually agreed to waive its investment advisory fee and/or reimburse operating expenses to the extent that the Fund’s total annual fund operating expenses (excluding any performance adjustments to management fees, the fees payable pursuant to a Rule 12b-1 plan, shareholder servicing fees, such as transfer agency fees (including out-of-pocket costs), administrative services fees and any networking/omnibus/administrative fees payable by any share class; brokerage commissions; interest; dividends; taxes; acquired fund fees and expenses; and extraordinary expenses) exceed 0.83% until at least February 1, 2020. The contractual waiver may be terminated or modified prior to this date only at the discretion of the Board of Trustees.
EXAMPLE:
The following Example is based on expenses without waivers. The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your
10  Janus Henderson Contrarian Fund

investment has a 5% return each year and that the Fund’s operating expenses without waivers remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
If Shares are redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 659 $ 837 $ 1,029 $ 1,586
Class C Shares $ 263 $ 505 $  871 $ 1,900
Class S Shares $ 106 $ 331 $  574 $ 1,271
Class I Shares $  58 $ 183 $  318 $  714
Class N Shares $  51 $ 160 $  280 $  628
Class R Shares $ 150 $ 465 $  803 $ 1,757
Class T Shares $  76 $ 237 $  411 $  918
  
    
If Shares are not redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 659 $ 837 $ 1,029 $ 1,586
Class C Shares $ 163 $ 505 $  871 $ 1,900
Class S Shares $ 106 $ 331 $  574 $ 1,271
Class I Shares $  58 $ 183 $  318 $  714
Class N Shares $  51 $ 160 $  280 $  628
Class R Shares $ 150 $ 465 $  803 $ 1,757
Class T Shares $  76 $ 237 $  411 $  918
  
Portfolio Turnover:  The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 59% of the average value of its portfolio.
PRINCIPAL INVESTMENT STRATEGIES
The Fund pursues its investment objective by investing, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities with the potential for long-term growth of capital. The portfolio manager seeks to invest in companies where the stock price trades at a significant discount to the portfolio manager’s estimate of fair value and whose intrinsic value the portfolio manager believes will grow over time. The Fund may invest in companies of any size, from larger, well-established companies to smaller, emerging growth companies. The Fund may also invest in fixed-income instruments, such as convertible securities and preferred stock. The Fund may invest in foreign securities, which may include investments in emerging markets.
The portfolio manager applies a “bottom up” approach in choosing investments. In other words, the portfolio manager looks at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies.
The Fund may lend portfolio securities on a short-term or long-term basis, in an amount equal to up to one-third of its total assets as determined at the time of the loan origination.
PRINCIPAL INVESTMENT RISKS
The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking an equity portfolio, including common stocks. Common stocks tend to be more volatile than many other investment choices.
Value Investing Risk.  Because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “value” stocks may perform differently than other types of stocks and from the market as a whole, and can continue to be undervalued by the market for long periods of time. It is also possible that a value stock will never appreciate to the extent expected by the portfolio manager.
11  Janus Henderson Contrarian Fund

Market Risk.  The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio manager’s belief about a company’s intrinsic worth is incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. Market risk may affect a single issuer, industry, economic sector, or the market as a whole.
Growth Securities Risk.  The Fund invests in companies that the portfolio manager believes have growth potential. Securities of companies perceived to be “growth” companies may be more volatile than other stocks and may involve special risks. If the portfolio manager’s perception of a company’s growth potential is not realized, the securities purchased may not perform as expected, reducing the Fund’s returns. In addition, because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “growth” stocks may perform differently from the market as a whole and other types of securities.
Nondiversification Risk.  The Fund is classified as nondiversified under the Investment Company Act of 1940, as amended. This gives the Fund’s portfolio manager more flexibility to hold larger positions in a smaller number of securities. As a result, an increase or decrease in the value of a single security held by the Fund may have a greater impact on the Fund’s net asset value and total return.
Small- and Mid-Sized Companies Risk.  The Fund’s investments in securities issued by small- and mid-sized companies, which can include smaller, start-up companies offering emerging products or services, may involve greater risks than are customarily associated with larger, more established companies. Securities issued by small- and mid-sized companies tend to be more volatile and somewhat more speculative than securities issued by larger or more established companies and may underperform as compared to the securities of larger or more established companies.
Foreign Exposure Risk.  The Fund may have exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.
Convertible Securities Risk.  The Fund may invest in securities that are convertible into preferred and common stocks, and thus, are subject to the risks of investments in both debt and equity securities. The market value of convertible securities tends to decline as interest rates increase and, conversely, tends to increase as interest rates decline. In addition, because of the conversion feature, the market value of convertible securities tends to vary with fluctuations in the market value of the underlying preferred and common stocks and, therefore, also will react to variations in the general market for equity securities.
Fixed-Income Securities Risk.  The Fund may hold debt and other fixed-income securities. Typically, the values of fixed-income securities change inversely with prevailing interest rates. Therefore, a fundamental risk of fixed-income securities is interest rate risk, which is the risk that the value of such securities will generally decline as prevailing interest rates rise, which may cause the Fund’s net asset value to likewise decrease. For example, while securities with longer maturities and durations tend to produce higher yields, they also tend to be more sensitive to changes in prevailing interest rates and are therefore more volatile than shorter-term securities and are subject to greater market fluctuations as a result of changes in interest rates. The Fund may be subject to heightened interest rate risk because the Federal Reserve has ended its monetary stimulus program known as quantitative easing and interest rates are near historically low levels. The Federal Reserve raised the federal funds rate several times in recent periods and has signaled additional increases in the near future. To the extent the Federal Reserve continues to raise rates, there is a risk that the fixed-income markets will experience increased volatility and that the liquidity of certain Fund investments may be reduced. These developments could cause the Fund’s net asset value to fluctuate or make it more difficult for the Fund to accurately value its securities. These developments or others also could cause the Fund to face increased shareholder redemptions, which may lead to increased portfolio turnover and transaction costs, or could force the Fund to liquidate investments at disadvantageous times or prices, therefore adversely
12  Janus Henderson Contrarian Fund

affecting the Fund as well as the value of your investment. The amount of assets deemed illiquid remaining within the Fund may also increase, making it more difficult to meet shareholder redemptions and further adversely affecting the value of the Fund. How specific fixed-income securities may react to changes in interest rates will depend on the specific characteristics of each security. Fixed-income securities are also subject to credit risk, prepayment risk, valuation risk, extension risk, and liquidity risk. Credit risk is the risk that the credit strength of an issuer of a fixed-income security will weaken and/or that the issuer will be unable to make timely principal and interest payments and that the security may go into default. Prepayment risk is the risk that during periods of falling interest rates, certain fixed-income securities with higher interest rates, such as mortgage- and asset-backed securities, may be prepaid by their issuers thereby reducing the amount of interest payments. Valuation risk is the risk that one or more of the fixed-income securities in which the Fund invests are priced differently than the value realized upon such security’s sale. In times of market instability, valuation may be more difficult. Extension risk is the risk that borrowers may pay off their debt obligations more slowly in times of rising interest rates, which will lengthen the duration of the portfolio. Liquidity risk is the risk that fixed-income securities may be difficult or impossible to sell at the time that the portfolio manager would like or at the price the portfolio manager believes the security is currently worth.
Securities Lending Risk.  The Fund may seek to earn additional income through lending its securities to certain qualified broker-dealers and institutions. There is the risk that when portfolio securities are lent, the securities may not be returned on a timely basis, and the Fund may experience delays and costs in recovering the security or gaining access to the collateral provided to the Fund to collateralize the loan. If the Fund is unable to recover a security on loan, the Fund may use the collateral to purchase replacement securities in the market. There is a risk that the value of the collateral could decrease below the cost of the replacement security by the time the replacement investment is made, resulting in a loss to the Fund.
Management Risk.  The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. The Fund may underperform its benchmark index or other mutual funds with similar investment objectives.
An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The following information provides some indication of the risks of investing in the Fund by showing how the Fund’s performance has varied over time. Class T Shares (formerly named Class J Shares, the initial share class) of the Fund commenced operations with the Fund’s inception. Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund commenced operations on July 6, 2009. Class N Shares of the Fund commenced operations on August 4, 2017.
The performance shown for Class T Shares is calculated using the fees and expenses of Class T Shares in effect during the periods shown, net of any applicable fee and expense limitations or waivers.
The performance shown for Class A Shares, Class C Shares, Class S Shares, and Class R Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of each respective share class, without the effect of any fee and expense limitations or waivers.
The performance shown for Class I Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of Class J Shares, net of any applicable fee and expense limitations or waivers.
The performance shown for Class N Shares for periods prior to August 4, 2017, reflects the performance of the Fund’s Class T Shares, calculated using the fees and expenses of Class T Shares, net of any applicable fee and expense limitations or waivers.
If Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund had been available during periods prior to July 6, 2009, or Class N Shares of the Fund had been available during periods prior to August 4, 2017, the performance shown for each respective share class may have been different. The performance shown for the periods following the Fund’s commencement of Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class N Shares, and Class R Shares reflects the fees and expenses of each respective share class, net of any applicable fee and expense limitations or waivers.
13  Janus Henderson Contrarian Fund

The bar chart depicts the change in performance from year to year during the periods indicated. The bar chart figures do not include any applicable sales charges that an investor may pay when they buy or sell Class A Shares or Class C Shares of the Fund. If sales charges were included, the returns would be lower. The table compares the Fund’s average annual returns for the periods indicated to a broad-based securities market index. All figures assume reinvestment of dividends and distributions. For certain periods, the Fund’s performance reflects the effect of expense waivers. Without the effect of these expense waivers, the performance shown would have been lower.
The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. Updated performance information is available at janushenderson.com/performance or by calling 1-877-335-2687.
Annual Total Returns for Class T Shares (calendar year-end)

    
Best Quarter: 2nd Quarter 2009 30.97% Worst Quarter: 3rd Quarter 2011 – 20.80%
  
    
Average Annual Total Returns (periods ended 12/31/18)        
  1 Year 5 Years 10 Years Since
Inception
(2/29/00)
Class T Shares        
Return Before Taxes – 4.10% 2.14% 9.34% 6.06%
Return After Taxes on Distributions – 6.36% 0.44% 8.41% 5.33%
Return After Taxes on Distributions and Sale of Fund Shares(1) – 1.53% 1.52% 7.63% 5.01%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
Class A Shares        
Return Before Taxes(2) – 9.72% 0.82% 8.55% 5.59%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
Class C Shares        
Return Before Taxes(3) – 5.79% 1.27% 8.31% 5.12%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
Class S Shares        
Return Before Taxes – 4.51% 1.84% 9.01% 5.73%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
Class I Shares        
Return Before Taxes – 3.97% 2.29% 9.34% 6.06%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
14  Janus Henderson Contrarian Fund

Average Annual Total Returns (periods ended 12/31/18)        
  1 Year 5 Years 10 Years Since
Inception
(2/29/00)
Class N Shares        
Return Before Taxes – 3.91% 2.14% 9.34% 6.06%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
Class R Shares        
Return Before Taxes – 4.78% 1.58% 8.71% 5.46%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 5.30%
  
(1) If the Fund incurs a loss, which generates a tax benefit, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Fund’s other return figures.
(2) Calculated assuming maximum permitted sales loads.
(3) The one year return is calculated to include the contingent deferred sales charge.
The Fund’s primary benchmark index is the S&P 500® Index. The S&P 500® Index is used to calculate the Fund’s performance fee adjustment. The index is described below.
The S&P 500® Index is a commonly recognized, market-capitalization weighted index of 500 widely held equity securities, designed to measure broad U.S. equity performance.
After-tax returns are calculated using distributions for the Fund’s Class T Shares (formerly named Class J Shares, the initial share class). After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-advantaged account, such as a 401(k) plan or an IRA.
After-tax returns are only shown for Class T Shares of the Fund. After-tax returns for the other classes of Shares will vary from those shown for Class T Shares due to varying sales charges (as applicable), fees, and expenses among the classes.
MANAGEMENT
Investment Adviser:  Janus Capital Management LLC
Portfolio Manager:  Nick Schommer, CFA, is Executive Vice President and Portfolio Manager of the Fund, which he has managed since July 2017.
PURCHASE AND SALE OF FUND SHARES
Minimum Investment Requirements*
Class A Shares, Class C Shares**, Class S Shares, Class R Shares, and Class T Shares  
Non-retirement accounts $ 2,500***
Certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class I Shares  
Through an intermediary institution  
• non-retirement accounts $ 2,500
• certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class N Shares  
Retirement investors (investing through an adviser-assisted, employer-sponsored retirement plan) None
Retail investors (investing through a financial intermediary omnibus account) $2,500****
Institutional investors (investing directly with the Fund) $ 1,000,000
  
15  Janus Henderson Contrarian Fund

* Exceptions to these minimums may apply for certain tax-advantaged, tax-qualified and retirement plans, accounts held through certain wrap programs, and certain retail brokerage accounts.
** The maximum purchase in Class C Shares is $500,000 for any single purchase.
*** Shareholders who invest through financial intermediaries with supermarket and/or self-directed brokerage platforms that maintain omnibus accounts and charge asset-based service fees may not be subject to this minimum. Please contact your financial intermediary for more information.
**** Investors in certain tax-advantaged accounts or accounts held through certain wrap programs may not be subject to this minimum.
Purchases, exchanges, and redemptions can generally be made only through institutional channels, such as financial intermediaries and retirement platforms. Class I Shares may be purchased directly by certain institutional investors who established Class I Shares accounts before August 4, 2017. You should contact your financial intermediary or refer to your plan documents for information on how to invest in the Fund. Requests must be received in good order by the Fund or its agents (financial intermediary or plan sponsor, if applicable) prior to the close of the regular trading session of the New York Stock Exchange in order to receive that day’s net asset value. For additional information, refer to “Purchases,” “Exchanges,” and/or “Redemptions” in the Prospectus.
Tax Information
The Fund’s distributions are taxable, and will be taxed as ordinary income or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account (in which case you may be taxed upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class R Shares, or Class T Shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment or to recommend one share class over another. There is some regulatory uncertainty concerning whether marketing support or other similar payments may be made or received in connection with Class I Shares where a financial intermediary has imposed its own sales charges or transaction fees. As a result, based on future regulatory developments, such payments may be terminated, or the Fund may prohibit financial intermediaries from imposing such sales charges or transaction fees in connection with Class I Shares. Ask your salesperson or visit your financial intermediary’s website for more information.
16  Janus Henderson Contrarian Fund

Fund summary

Janus Henderson Enterprise Fund
(closed to certain new investors)
Ticker: JDMAX Class A Shares JGRTX Class S Shares JDMNX Class N Shares JAENX Class T Shares
  JGRCX Class C Shares JMGRX Class I Shares JDMRX Class R Shares    
    
INVESTMENT OBJECTIVE
Janus Henderson Enterprise Fund seeks long-term growth of capital.
FEES AND EXPENSES OF THE FUND
This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund. For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus Henderson mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 100 of the Fund’s Prospectus and in the “Purchases” section on page 85 of the Fund’s Statement of Additional Information. In addition, please see Appendix A – Intermediary Sales Charge Waivers and Discounts. You may also incur brokerage commissions charged by your broker or financial intermediary when buying Class I Shares or Class N Shares of the Fund that are not reflected in the table or in the example below.
SHAREHOLDER FEES
(fees paid directly from your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)   5.75%   None   None   None   None   None   None
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)   None   1.00%   None   None   None   None   None
  
    
ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Management Fees   0.64%   0.64%   0.64%   0.64%   0.64%   0.64%   0.64%
Distribution/Service (12b-1) Fees   0.25%   1.00%   0.25%   None   None   0.50%   None
Other Expenses   0.27%   0.10%   0.27%   0.11%   0.02%   0.27%   0.27%
Total Annual Fund Operating Expenses   1.16%   1.74%   1.16%   0.75%   0.66%   1.41%   0.91%
  
EXAMPLE:
The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
If Shares are redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 686 $ 922 $ 1,177 $ 1,903
Class C Shares $ 277 $ 548 $  944 $ 2,052
Class S Shares $ 118 $ 368 $  638 $ 1,409
Class I Shares $  77 $ 240 $  417 $  930
Class N Shares $  67 $ 211 $  368 $  822
Class R Shares $ 144 $ 446 $  771 $ 1,691
Class T Shares $  93 $ 290 $  504 $ 1,120
  
    
17  Janus Henderson Enterprise Fund

If Shares are not redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 686 $ 922 $ 1,177 $ 1,903
Class C Shares $ 177 $ 548 $  944 $ 2,052
Class S Shares $ 118 $ 368 $  638 $ 1,409
Class I Shares $  77 $ 240 $  417 $  930
Class N Shares $  67 $ 211 $  368 $  822
Class R Shares $ 144 $ 446 $  771 $ 1,691
Class T Shares $  93 $ 290 $  504 $ 1,120
  
Portfolio Turnover:  The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 13% of the average value of its portfolio.
PRINCIPAL INVESTMENT STRATEGIES
The Fund pursues its investment objective by investing primarily in common stocks selected for their growth potential, and normally invests at least 50% of its equity assets in medium-sized companies. Medium-sized companies are those whose market capitalization falls within the range of companies in the Russell Midcap® Growth Index. Market capitalization is a commonly used measure of the size and value of a company. The market capitalizations within the index will vary, but as of September 30, 2018, they ranged from approximately $380 million to $36.63 billion. The Fund may also invest in foreign securities, which may include investments in emerging markets. In addition, the Fund’s investments may include securities of real-estate related companies, including real-estate investment trusts.
The portfolio managers apply a “bottom up” approach in choosing investments. In other words, the portfolio managers look at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies. Attributes considered in the process of securities selection may include sustainable growth, return on invested capital, and competitive positioning.
The Fund may also invest its assets in derivatives, which are instruments that have a value derived from, or directly linked to, an underlying asset, such as equity securities, fixed-income securities, commodities, currencies, interest rates, or market indices. In particular, the Fund may use forward currency contracts to offset risks associated with an investment, currency exposure, or market conditions, or to hedge currency exposure relative to the Fund’s benchmark index.
The Fund may lend portfolio securities on a short-term or long-term basis, in an amount equal to up to one-third of its total assets as determined at the time of the loan origination.
PRINCIPAL INVESTMENT RISKS
The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking an equity portfolio, including common stocks. Common stocks tend to be more volatile than many other investment choices.
Market Risk.  The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio managers’ belief about a company’s intrinsic worth is incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. Market risk may affect a single issuer, industry, economic sector, or the market as a whole.
Mid-Sized Companies Risk.  The Fund’s investments in securities issued by mid-sized companies may involve greater risks than are customarily associated with larger, more established companies. Securities issued by mid-sized companies tend to be more volatile than securities issued by larger or more established companies and may underperform as compared to the securities of larger or more established companies.
18  Janus Henderson Enterprise Fund

Growth Securities Risk.  The Fund invests in companies that the portfolio managers believe have growth potential. Securities of companies perceived to be “growth” companies may be more volatile than other stocks and may involve special risks. If the portfolio managers’ perception of a company’s growth potential is not realized, the securities purchased may not perform as expected, reducing the Fund’s returns. In addition, because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “growth” stocks may perform differently from the market as a whole and other types of securities.
Foreign Exposure Risk.  The Fund may have exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.
Real Estate Securities Risk.  The Fund’s performance may be affected by the risks associated with investments in real estate-related companies. The value of real estate-related companies’ securities is sensitive to changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, supply and demand, and the management skill and creditworthiness of the company. Investments in real estate investment trusts (“REITs”) involve the same risks as other real estate investments. In addition, a REIT could fail to qualify for tax-free pass-through of its income under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) or fail to maintain its exemption from registration under the Investment Company Act of 1940, as amended, which could produce adverse economic consequences for the REIT and its investors, including the Fund.
Derivatives Risk.  Derivatives can be highly volatile and involve risks in addition to the risks of the underlying referenced securities or asset. Gains or losses from a derivative investment can be substantially greater than the derivative’s original cost, and can therefore involve leverage. Leverage may cause the Fund to be more volatile than if it had not used leverage. Derivatives can be less liquid than other types of investments and entail the risk that the counterparty will default on its payment obligations. The Fund may use derivatives, including forward currency contracts, for hedging purposes. Hedging with derivatives may increase expenses, and there is no guarantee that a hedging strategy will work. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains or cause losses if the market moves in a manner different from that anticipated by the portfolio managers or if the cost of the derivative outweighs the benefit of the hedge.
Sector Risk.  At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business within an economic sector. Companies in the same economic sector may be similarly affected by economic or market events, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. As the Fund’s portfolio becomes more concentrated, the Fund is less able to spread risk and potentially reduce the risk of loss and volatility. In addition, the Fund may be overweight or underweight in certain sectors relative to its benchmark index, which may cause the Fund’s performance to be more or less sensitive to developments affecting those sectors.
Securities Lending Risk.  The Fund may seek to earn additional income through lending its securities to certain qualified broker-dealers and institutions. There is the risk that when portfolio securities are lent, the securities may not be returned on a timely basis, and the Fund may experience delays and costs in recovering the security or gaining access to the collateral provided to the Fund to collateralize the loan. If the Fund is unable to recover a security on loan, the Fund may use the collateral to purchase replacement securities in the market. There is a risk that the value of the collateral could decrease below the cost of the replacement security by the time the replacement investment is made, resulting in a loss to the Fund.
Management Risk.  The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. The Fund may underperform its benchmark index or other mutual funds with similar investment objectives.
An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
19  Janus Henderson Enterprise Fund

Performance Information
The following information provides some indication of the risks of investing in the Fund by showing how the Fund’s performance has varied over time. Class T Shares (formerly named Class J Shares, the initial share class) of the Fund commenced operations with the Fund’s inception. Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund commenced operations on July 6, 2009. Class N Shares of the Fund commenced operations on July 12, 2012.
The performance shown for Class T Shares is calculated using the fees and expenses of Class T Shares in effect during the periods shown, net of any applicable fee and expense limitations or waivers.
The performance shown for Class A Shares, Class C Shares, Class S Shares, and Class R Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of each respective share class, without the effect of any fee and expense limitations or waivers.
The performance shown for Class I Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of Class J Shares, net of any applicable fee and expense limitations or waivers.
The performance shown for Class N Shares for periods prior to July 12, 2012, reflects the performance of the Fund’s Class T Shares, calculated using the fees and expenses of Class T Shares, net of any applicable fee and expense limitations or waivers.
If Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund had been available during periods prior to July 6, 2009, or Class N Shares of the Fund had been available during periods prior to July 12, 2012, the performance shown for each respective share class may have been different. The performance shown for the periods following the Fund’s commencement of Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class N Shares, and Class R Shares reflects the fees and expenses of each respective share class, net of any applicable fee and expense limitations or waivers.
The bar chart depicts the change in performance from year to year during the periods indicated. The bar chart figures do not include any applicable sales charges that an investor may pay when they buy or sell Class A Shares or Class C Shares of the Fund. If sales charges were included, the returns would be lower. The table compares the Fund’s average annual returns for the periods indicated to a broad-based securities market index. All figures assume reinvestment of dividends and distributions. For certain periods, the Fund’s performance reflects the effect of expense waivers. Without the effect of these expense waivers, the performance shown would have been lower.
The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. Updated performance information is available at janushenderson.com/performance or by calling 1-877-335-2687.
Annual Total Returns for Class T Shares (calendar year-end)

    
Best Quarter: 2nd Quarter 2009 21.55% Worst Quarter: 3rd Quarter 2011 – 16.35%
  
    
20  Janus Henderson Enterprise Fund

Average Annual Total Returns (periods ended 12/31/18)        
  1 Year 5 Years 10 Years Since
Inception
(9/1/92)
Class T Shares        
Return Before Taxes – 1.05% 10.10% 15.93% 10.65%
Return After Taxes on Distributions – 2.45% 9.11% 15.21% 9.92%
Return After Taxes on Distributions and Sale of Fund Shares(1) 0.38% 7.88% 13.46% 9.17%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class A Shares        
Return Before Taxes(2) – 6.94% 8.56% 15.02% 10.29%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class C Shares        
Return Before Taxes(3) – 2.78% 9.17% 14.79% 9.76%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class S Shares        
Return Before Taxes – 1.30% 9.82% 15.61% 10.41%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class I Shares        
Return Before Taxes – 0.90% 10.25% 15.93% 10.65%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class N Shares        
Return Before Taxes – 0.81% 10.36% 15.93% 10.65%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
Class R Shares        
Return Before Taxes – 1.55% 9.54% 15.29% 10.15%
Russell Midcap® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 4.75% 7.42% 15.12% 9.65%
  
(1) If the Fund incurs a loss, which generates a tax benefit, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Fund’s other return figures.
(2) Calculated assuming maximum permitted sales loads.
(3) The one year return is calculated to include the contingent deferred sales charge.
The Fund’s primary benchmark index is the Russell Midcap® Growth Index. The index is described below.
The Russell Midcap® Growth Index measures the performance of those Russell Midcap® companies with higher price-to-book ratios and higher forecasted growth values. The stocks are also members of the Russell 1000® Growth Index.
After-tax returns are calculated using distributions for the Fund’s Class T Shares (formerly named Class J Shares, the initial share class). After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-advantaged account, such as a 401(k) plan or an IRA.
After-tax returns are only shown for Class T Shares of the Fund. After-tax returns for the other classes of Shares will vary from those shown for Class T Shares due to varying sales charges (as applicable), fees, and expenses among the classes.
21  Janus Henderson Enterprise Fund

MANAGEMENT
Investment Adviser:  Janus Capital Management LLC
Portfolio Managers:  Brian Demain, CFA, is Executive Vice President and Co-Portfolio Manager of the Fund, which he has managed or co-managed since November 2007. Cody Wheaton, CFA, is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since July 2016.
PURCHASE AND SALE OF FUND SHARES
Minimum Investment Requirements*
Class A Shares, Class C Shares**, Class S Shares, Class R Shares, and Class T Shares  
Non-retirement accounts $ 2,500***
Certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class I Shares  
Through an intermediary institution  
• non-retirement accounts $ 2,500
• certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class N Shares  
Retirement investors (investing through an adviser-assisted, employer-sponsored retirement plan) None
Retail investors (investing through a financial intermediary omnibus account) $2,500****
Institutional investors (investing directly with the Fund) $ 1,000,000
  
* Exceptions to these minimums may apply for certain tax-advantaged, tax-qualified and retirement plans, accounts held through certain wrap programs, and certain retail brokerage accounts.
** The maximum purchase in Class C Shares is $500,000 for any single purchase.
*** Shareholders who invest through financial intermediaries with supermarket and/or self-directed brokerage platforms that maintain omnibus accounts and charge asset-based service fees may not be subject to this minimum. Please contact your financial intermediary for more information.
**** Investors in certain tax-advantaged accounts or accounts held through certain wrap programs may not be subject to this minimum.
Purchases, exchanges, and redemptions can generally be made only through institutional channels, such as financial intermediaries and retirement platforms. Class I Shares may be purchased directly by certain institutional investors who established Class I Shares accounts before August 4, 2017. You should contact your financial intermediary or refer to your plan documents for information on how to invest in the Fund. Requests must be received in good order by the Fund or its agents (financial intermediary or plan sponsor, if applicable) prior to the close of the regular trading session of the New York Stock Exchange in order to receive that day’s net asset value. For additional information, refer to “Purchases,” “Exchanges,” and/or “Redemptions” in the Prospectus.
Tax Information
The Fund’s distributions are taxable, and will be taxed as ordinary income or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account (in which case you may be taxed upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class R Shares, or Class T Shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment or to recommend one share class over another. There is some regulatory uncertainty concerning whether marketing support or other similar payments may be made or received in connection with Class I Shares where a financial intermediary has imposed its own sales charges or transaction fees. As a result, based on future regulatory developments, such payments may be terminated, or the Fund may prohibit financial intermediaries from imposing such sales charges or transaction fees in connection with Class I Shares. Ask your salesperson or visit your financial intermediary’s website for more information.
22  Janus Henderson Enterprise Fund

Fund summary

Janus Henderson Forty Fund
Ticker: JDCAX Class A Shares JARTX Class S Shares JFRNX Class N Shares JACTX Class T Shares
  JACCX Class C Shares JCAPX Class I Shares JDCRX Class R Shares    
    
INVESTMENT OBJECTIVE
Janus Henderson Forty Fund seeks long-term growth of capital.
FEES AND EXPENSES OF THE FUND
This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund. For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus Henderson mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 100 of the Fund’s Prospectus and in the “Purchases” section on page 85 of the Fund’s Statement of Additional Information. In addition, please see Appendix A – Intermediary Sales Charge Waivers and Discounts. You may also incur brokerage commissions charged by your broker or financial intermediary when buying Class I Shares or Class N Shares of the Fund that are not reflected in the table or in the example below.
SHAREHOLDER FEES
(fees paid directly from your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)   5.75%   None   None   None   None   None   None
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)   None   1.00%   None   None   None   None   None
  
    
ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Management Fees (may adjust up or down)   0.64%   0.64%   0.64%   0.64%   0.64%   0.64%   0.64%
Distribution/Service (12b-1) Fees   0.25%   1.00%   0.25%   None   None   0.50%   None
Other Expenses   0.15%   0.10%   0.26%   0.08%   0.02%   0.26%   0.27%
Total Annual Fund Operating Expenses   1.04%   1.74%   1.15%   0.72%   0.66%   1.40%   0.91%
  
EXAMPLE:
The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
If Shares are redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 675 $ 887 $ 1,116 $ 1,773
Class C Shares $ 277 $ 548 $  944 $ 2,052
Class S Shares $ 117 $ 365 $  633 $ 1,398
Class I Shares $  74 $ 230 $  401 $  894
Class N Shares $  67 $ 211 $  368 $  822
Class R Shares $ 143 $ 443 $  766 $ 1,680
Class T Shares $  93 $ 290 $  504 $ 1,120
  
    
23  Janus Henderson Forty Fund

If Shares are not redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 675 $ 887 $ 1,116 $ 1,773
Class C Shares $ 177 $ 548 $  944 $ 2,052
Class S Shares $ 117 $ 365 $  633 $ 1,398
Class I Shares $  74 $ 230 $  401 $  894
Class N Shares $  67 $ 211 $  368 $  822
Class R Shares $ 143 $ 443 $  766 $ 1,680
Class T Shares $  93 $ 290 $  504 $ 1,120
  
Portfolio Turnover:  The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 37% of the average value of its portfolio.
PRINCIPAL INVESTMENT STRATEGIES
The Fund pursues its investment objective by normally investing primarily in a core group of 20-40 common stocks selected for their growth potential. The Fund may invest in companies of any size, from larger, well-established companies to smaller, emerging growth companies. The Fund may also invest in foreign securities, which may include investments in emerging markets. As of September 30, 2018, the Fund held stocks of 41 companies. Of these holdings, 20 comprised approximately 69.82% of the Fund’s holdings.
The portfolio managers apply a “bottom up” approach in choosing investments. In other words, the portfolio managers look at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies.
The Fund may lend portfolio securities on a short-term or long-term basis, in an amount equal to up to one-third of its total assets as determined at the time of the loan origination.
PRINCIPAL INVESTMENT RISKS
The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking an equity portfolio, including common stocks. Common stocks tend to be more volatile than many other investment choices.
Market Risk.  The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio managers’ belief about a company’s intrinsic worth is incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. Market risk may affect a single issuer, industry, economic sector, or the market as a whole.
Growth Securities Risk.  The Fund invests in companies that the portfolio managers believe have growth potential. Securities of companies perceived to be “growth” companies may be more volatile than other stocks and may involve special risks. If the portfolio managers’ perception of a company’s growth potential is not realized, the securities purchased may not perform as expected, reducing the Fund’s returns. In addition, because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “growth” stocks may perform differently from the market as a whole and other types of securities.
Nondiversification Risk.  The Fund is classified as nondiversified under the Investment Company Act of 1940, as amended. This gives the Fund’s portfolio managers more flexibility to hold larger positions in a smaller number of securities. As a result, an increase or decrease in the value of a single security held by the Fund may have a greater impact on the Fund’s net asset value and total return.
Mid-Sized Companies Risk.  The Fund’s investments in securities issued by mid-sized companies may involve greater risks than are customarily associated with larger, more established companies. Securities issued by mid-sized companies tend to be
24  Janus Henderson Forty Fund

more volatile than securities issued by larger or more established companies and may underperform as compared to the securities of larger or more established companies.
Foreign Exposure Risk.  The Fund may have exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.
Securities Lending Risk.  The Fund may seek to earn additional income through lending its securities to certain qualified broker-dealers and institutions. There is the risk that when portfolio securities are lent, the securities may not be returned on a timely basis, and the Fund may experience delays and costs in recovering the security or gaining access to the collateral provided to the Fund to collateralize the loan. If the Fund is unable to recover a security on loan, the Fund may use the collateral to purchase replacement securities in the market. There is a risk that the value of the collateral could decrease below the cost of the replacement security by the time the replacement investment is made, resulting in a loss to the Fund.
Management Risk.  The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. The Fund may underperform its benchmark index or other mutual funds with similar investment objectives.
An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The following information provides some indication of the risks of investing in the Fund by showing how the Fund’s performance has varied over time. Class S Shares, Class A Shares, Class C Shares, Class I Shares, and Class R Shares of the Fund commenced operations on July 6, 2009, after the reorganization of each corresponding class of shares of Janus Adviser Forty Fund (the “JAD predecessor fund”) into each respective share class of the Fund. Class T Shares of the Fund commenced operations on July 6, 2009. Class N Shares of the Fund commenced operations on May 31, 2012.
The performance shown for Class S Shares reflects the performance of the JAD predecessor fund’s Class S Shares (formerly named Class I Shares) from August 1, 2000 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods prior to August 1, 2000, the performance shown for Class S Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to August 1, 2000 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class A Shares reflects the performance of the JAD predecessor fund’s Class A Shares from September 30, 2004 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class A Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods August 1, 2000 to September 30, 2004, the performance shown for Class A Shares reflects the historical performance of the JAD predecessor fund’s Class S Shares (formerly named Class I Shares). For the periods prior to August 1, 2000, the performance shown for Class A Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to September 30, 2004 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class C Shares reflects the performance of the JAD predecessor fund’s Class C Shares from September 30, 2002 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class C Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods August 1, 2000 to September 30, 2002, the performance shown for Class C Shares reflects the historical performance of the JAD
25  Janus Henderson Forty Fund

  predecessor fund’s Class S Shares (formerly named Class I Shares). For the periods prior to August 1, 2000, the performance shown for Class C Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to September 30, 2002 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class I Shares reflects the performance of the JAD predecessor fund’s Class I Shares from November 28, 2005 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class I Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods August 1, 2000 to November 28, 2005, the performance shown for Class I Shares reflects the historical performance of the JAD predecessor fund’s Class S Shares (formerly named Class I Shares). For the periods prior to August 1, 2000, the performance shown for Class I Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to November 28, 2005 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class N Shares reflects the performance of the Fund’s Class S Shares from July 6, 2009 to May 31, 2012, calculated using the fees and expenses of Class S Shares, net of any applicable fee and expense limitations or waivers. For the period from August 1, 2000 to July 6, 2009, the performance shown for Class N Shares reflects the performance of Class S Shares (formerly named Class I Shares) of the JAD predecessor fund (prior to the reorganization of those Class S Shares into the Fund), calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods prior to August 1, 2000, the performance shown for Class N Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance for certain periods prior to August 1, 2000 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class R Shares reflects the performance of the JAD predecessor fund’s Class R Shares from September 30, 2004 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class R Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods August 1, 2000 to September 30, 2004, the performance shown for Class R Shares reflects the historical performance of the JAD predecessor fund’s Class S Shares (formerly named Class I Shares). For the periods prior to August 1, 2000, the performance shown for Class R Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to September 30, 2004 was calculated using the fees and expenses of Class R Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
The performance shown for Class T Shares reflects the performance of the JAD predecessor fund’s Class S Shares (formerly named Class I Shares) from August 1, 2000 to July 6, 2009 (prior to the reorganization), calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, net of any applicable fee and expense limitations or waivers. For the periods prior to August 1, 2000, the performance shown for Class T Shares reflects the historical performance of the Retirement Shares of Janus Aspen Series – Forty Portfolio (as a result of a separate prior reorganization of those Retirement Shares into the JAD predecessor fund). The performance shown for certain periods prior to August 1, 2000 was calculated using the fees and expenses of Class S Shares of the JAD predecessor fund, without the effect of any fee and expense limitations or waivers.
If Class A Shares, Class C Shares, Class I Shares, Class R Shares, and Class T Shares of the Fund had been available during each period prior to July 6, 2009, or Class N Shares of the Fund had been available during periods prior to May 31, 2012, the performance shown for each respective share class may have been different. The performance shown for the periods following the Fund’s commencement of Class S Shares, Class A Shares, Class C Shares, Class I Shares, Class N Shares, Class R Shares, and Class T Shares reflects the fees and expenses of each respective share class, net of any applicable fee and expense limitations or waivers.
The bar chart depicts the change in performance from year to year during the periods indicated. The bar chart figures do not include any applicable sales charges that an investor may pay when they buy or sell Class A Shares or Class C Shares of the Fund. If sales charges were included, the returns would be lower. The table compares the Fund’s average annual returns for the periods indicated to broad-based securities market indices. All figures assume reinvestment of dividends and distributions.
26  Janus Henderson Forty Fund

For certain periods, the Fund’s performance reflects the effect of expense waivers. Without the effect of these expense waivers, the performance shown would have been lower.
The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. Updated performance information is available at janushenderson.com/performance or by calling 1-877-335-2687.
Annual Total Returns for Class S Shares (calendar year-end)

    
Best Quarter: 2nd Quarter 2009 20.90% Worst Quarter: 3rd Quarter 2011 – 15.55%
  
    
Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
of Predecessor Fund
(5/1/97)
Class S Shares        
Return Before Taxes 1.04% 10.04% 13.95% 10.66%
Return After Taxes on Distributions – 0.92% 6.03% 11.33% 9.39%
Return After Taxes on Distributions and Sale of Fund Shares(1) 2.04% 7.20% 11.18% 9.11%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
Class A Shares        
Return Before Taxes(2) – 4.63% 8.82% 13.41% 10.48%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
Class C Shares        
Return Before Taxes(3) – 0.39% 9.46% 13.30% 10.09%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
Class I Shares        
Return Before Taxes 1.50% 10.47% 14.41% 10.66%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
27  Janus Henderson Forty Fund

Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
of Predecessor Fund
(5/1/97)
Class N Shares        
Return Before Taxes 1.59% 10.56% 13.95% 10.66%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
Class R Shares        
Return Before Taxes 0.80% 9.73% 13.64% 10.40%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
Class T Shares        
Return Before Taxes 1.32% 10.30% 13.95% 10.66%
Russell 1000® Growth Index
(reflects no deduction for expenses, fees, or taxes)
– 1.51% 10.40% 15.29% 7.22%
S&P 500® Index
(reflects no deduction for expenses, fees, or taxes)
– 4.38% 8.49% 13.12% 7.42%
  
(1) If the Fund incurs a loss, which generates a tax benefit, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Fund’s other return figures.
(2) Calculated assuming maximum permitted sales loads.
(3) The one year return is calculated to include the contingent deferred sales charge.
The Fund’s primary benchmark index is the Russell 1000® Growth Index. The Fund also compares its performance to the S&P 500® Index. The Russell 1000® Growth Index is used to calculate the Fund’s performance fee adjustment. The indices are described below.
The Russell 1000® Growth Index measures the performance of those Russell 1000® companies with higher price-to-book ratios and higher forecasted growth values.
The S&P 500® Index is a commonly recognized, market-capitalization weighted index of 500 widely held equity securities, designed to measure broad U.S. equity performance.
After-tax returns are calculated using distributions for the Fund’s Class S Shares for periods following July 6, 2009; for the JAD predecessor fund’s Class S Shares (formerly named Class I Shares) for the periods August 1, 2000 to July 6, 2009; and actual distributions for other classes of shares for periods prior to August 1, 2000. After-tax returns are calculated using the historically highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your individual tax situation and may differ from those shown in the preceding table. The after-tax return information shown above does not apply to Fund shares held through a tax-advantaged account, such as a 401(k) plan or an IRA.
After-tax returns are only shown for Class S Shares of the Fund. After-tax returns for the other classes of Shares will vary from those shown for Class S Shares due to varying sales charges (as applicable), fees, and expenses among the classes.
28  Janus Henderson Forty Fund

MANAGEMENT
Investment Adviser:  Janus Capital Management LLC
Portfolio Managers:  A. Douglas Rao is Executive Vice President and Co-Portfolio Manager of the Fund, which he has managed or co-managed since June 2013. Nick Schommer, CFA, is Executive Vice President and Co-Portfolio Manager of the Fund, which he has co-managed since January 2016.
PURCHASE AND SALE OF FUND SHARES
Minimum Investment Requirements*
Class A Shares, Class C Shares**, Class S Shares, Class R Shares, and Class T Shares  
Non-retirement accounts $ 2,500***
Certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class I Shares  
Through an intermediary institution  
• non-retirement accounts $ 2,500
• certain tax-advantaged accounts or UGMA/UTMA accounts $ 500
Class N Shares  
Retirement investors (investing through an adviser-assisted, employer-sponsored retirement plan) None
Retail investors (investing through a financial intermediary omnibus account) $2,500****
Institutional investors (investing directly with the Fund) $ 1,000,000
  
* Exceptions to these minimums may apply for certain tax-advantaged, tax-qualified and retirement plans, accounts held through certain wrap programs, and certain retail brokerage accounts.
** The maximum purchase in Class C Shares is $500,000 for any single purchase.
*** Shareholders who invest through financial intermediaries with supermarket and/or self-directed brokerage platforms that maintain omnibus accounts and charge asset-based service fees may not be subject to this minimum. Please contact your financial intermediary for more information.
**** Investors in certain tax-advantaged accounts or accounts held through certain wrap programs may not be subject to this minimum.
Purchases, exchanges, and redemptions can generally be made only through institutional channels, such as financial intermediaries and retirement platforms. Class I Shares may be purchased directly by certain institutional investors who established Class I Shares accounts before August 4, 2017. You should contact your financial intermediary or refer to your plan documents for information on how to invest in the Fund. Requests must be received in good order by the Fund or its agents (financial intermediary or plan sponsor, if applicable) prior to the close of the regular trading session of the New York Stock Exchange in order to receive that day’s net asset value. For additional information, refer to “Purchases,” “Exchanges,” and/or “Redemptions” in the Prospectus.
Tax Information
The Fund’s distributions are taxable, and will be taxed as ordinary income or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account (in which case you may be taxed upon withdrawal of your investment from such account).
Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class R Shares, or Class T Shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment or to recommend one share class over another. There is some regulatory uncertainty concerning whether marketing support or other similar payments may be made or received in connection with Class I Shares where a financial intermediary has imposed its own sales charges or transaction fees. As a result, based on future regulatory developments, such payments may be terminated, or the Fund may prohibit financial intermediaries from imposing such sales charges or transaction fees in connection with Class I Shares. Ask your salesperson or visit your financial intermediary’s website for more information.
29  Janus Henderson Forty Fund

Fund summary

Janus Henderson Growth and Income Fund
Ticker: JDNAX Class A Shares JADGX Class S Shares JDNNX Class N Shares JAGIX Class T Shares
  JGICX Class C Shares JGINX Class I Shares JDNRX Class R Shares    
    
INVESTMENT OBJECTIVE
Janus Henderson Growth and Income Fund seeks long-term capital growth and current income.
FEES AND EXPENSES OF THE FUND
This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. Each share class has different expenses, but represents an investment in the same Fund. For Class A Shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund or in other Janus Henderson mutual funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial professional and in the “Purchases” section on page 100 of the Fund’s Prospectus and in the “Purchases” section on page 85 of the Fund’s Statement of Additional Information. In addition, please see Appendix A – Intermediary Sales Charge Waivers and Discounts. You may also incur brokerage commissions charged by your broker or financial intermediary when buying Class I Shares or Class N Shares of the Fund that are not reflected in the table or in the example below.
SHAREHOLDER FEES
(fees paid directly from your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)   5.75%   None   None   None   None   None   None
Maximum Deferred Sales Charge (load) (as a percentage of the lower of original purchase price or redemption proceeds)   None   1.00%   None   None   None   None   None
  
    
ANNUAL FUND OPERATING EXPENSES
(expenses that you pay each year as a percentage of the value of your investment)
  Class A   Class C   Class S   Class I   Class N   Class R   Class T
Management Fees   0.60%   0.60%   0.60%   0.60%   0.60%   0.60%   0.60%
Distribution/Service (12b-1) Fees   0.25%   1.00%   0.25%   None   None   0.50%   None
Other Expenses   0.10%   0.10%   0.28%   0.09%   0.05%   0.31%   0.27%
Total Annual Fund Operating Expenses   0.95%   1.70%   1.13%   0.69%   0.65%   1.41%   0.87%
  
EXAMPLE:
The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and reinvest all dividends and distributions. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
If Shares are redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 666 $ 860 $ 1,070 $ 1,674
Class C Shares $ 273 $ 536 $  923 $ 2,009
Class S Shares $ 115 $ 359 $  622 $ 1,375
Class I Shares $  70 $ 221 $  384 $  859
Class N Shares $  66 $ 208 $  362 $  810
Class R Shares $ 144 $ 446 $  771 $ 1,691
Class T Shares $  89 $ 278 $  482 $ 1,073
  
    
30  Janus Henderson Growth and Income Fund

If Shares are not redeemed: 1 Year 3 Years 5 Years 10 Years
Class A Shares $ 666 $ 860 $ 1,070 $ 1,674
Class C Shares $ 173 $ 536 $  923 $ 2,009
Class S Shares $ 115 $ 359 $  622 $ 1,375
Class I Shares $  70 $ 221 $  384 $  859
Class N Shares $  66 $ 208 $  362 $  810
Class R Shares $ 144 $ 446 $  771 $ 1,691
Class T Shares $  89 $ 278 $  482 $ 1,073
  
Portfolio Turnover:  The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 13% of the average value of its portfolio.
PRINCIPAL INVESTMENT STRATEGIES
The Fund pursues its investment objective by normally emphasizing investments in common stocks. The Fund will normally invest up to 75% of its assets in equity securities selected primarily for their growth potential and at least 25% of its assets in securities the portfolio managers believe have income potential.
With respect to the selection of equity securities selected for growth potential, the portfolio managers additionally consider income-generating potential. Eligible equity securities in which the Fund may invest include:
common stocks
preferred stocks
securities convertible into common stocks or preferred stocks, such as convertible preferred stocks, bonds, and debentures
other securities with equity characteristics
With respect to the selection of securities selected for income potential, equity securities may make up part or all of the income component. The portfolio managers focus on identifying large, well-established companies that pay out a large portion of their free cash flow in dividends and have the ability to grow their dividends over time. The Fund invests to a lesser extent in fixed-income securities, such as corporate bonds.
The portfolio managers apply a “bottom up” approach in choosing investments. In other words, the portfolio managers look at companies one at a time to determine if a company is an attractive investment opportunity and if it is consistent with the Fund’s investment policies.
The Fund may also invest in foreign securities, which may include investments in emerging markets.
The Fund may invest its assets in derivatives, which are instruments that have a value derived from, or directly linked to, an underlying asset, such as equity securities, fixed-income securities, commodities, currencies, interest rates, or market indices, as substitutes for securities in which the Fund invests. The types of derivatives in which the Fund may invest include put and call options. The Fund may invest in derivative instruments (by taking long and/or short positions) for different purposes, including hedging (to offset risks associated with an investment, currency exposure, or market conditions) and to earn income and enhance returns.
The Fund may lend portfolio securities on a short-term or long-term basis, in an amount equal to up to one-third of its total assets as determined at the time of the loan origination.
PRINCIPAL INVESTMENT RISKS
The biggest risk is that the Fund’s returns will vary, and you could lose money. The Fund is designed for long-term investors seeking an equity portfolio, including common stocks. Common stocks tend to be more volatile than many other investment choices. The Fund’s investment strategies could result in significant fluctuations of income.
Market Risk.  The value of the Fund’s portfolio may decrease if the value of an individual company or security, or multiple companies or securities, in the portfolio decreases or if the portfolio managers’ belief about a company’s intrinsic worth is
31  Janus Henderson Growth and Income Fund

incorrect. Further, regardless of how well individual companies or securities perform, the value of the Fund’s portfolio could also decrease if there are deteriorating economic or market conditions. It is important to understand that the value of your investment may fall, sometimes sharply, in response to changes in the market, and you could lose money. Market risk may affect a single issuer, industry, economic sector, or the market as a whole.
Growth Securities Risk.  The Fund invests in companies that the portfolio managers believe have growth potential. Securities of companies perceived to be “growth” companies may be more volatile than other stocks and may involve special risks. If the portfolio managers’ perception of a company’s growth potential is not realized, the securities purchased may not perform as expected, reducing the Fund’s returns. In addition, because different types of stocks tend to shift in and out of favor depending on market and economic conditions, “growth” stocks may perform differently from the market as a whole and other types of securities.
Dividend-Oriented Stocks Risk.  Companies that have paid regular dividends to shareholders may decrease or eliminate dividend payments in the future. A decrease in dividend payments by an issuer may result in a decrease in the value of the security held by the Fund or the Fund receiving less income.
Fixed-Income Securities Risk.  The Fund may hold debt and other fixed-income securities. Typically, the values of fixed-income securities change inversely with prevailing interest rates. Therefore, a fundamental risk of fixed-income securities is interest rate risk, which is the risk that the value of such securities will generally decline as prevailing interest rates rise, which may cause the Fund’s net asset value to likewise decrease. For example, while securities with longer maturities and durations tend to produce higher yields, they also tend to be more sensitive to changes in prevailing interest rates and are therefore more volatile than shorter-term securities and are subject to greater market fluctuations as a result of changes in interest rates. The Fund may be subject to heightened interest rate risk because the Federal Reserve has ended its monetary stimulus program known as quantitative easing and interest rates are near historically low levels. The Federal Reserve raised the federal funds rate several times in recent periods and has signaled additional increases in the near future. To the extent the Federal Reserve continues to raise rates, there is a risk that the fixed-income markets will experience increased volatility and that the liquidity of certain Fund investments may be reduced. These developments could cause the Fund’s net asset value to fluctuate or make it more difficult for the Fund to accurately value its securities. These developments or others also could cause the Fund to face increased shareholder redemptions, which may lead to increased portfolio turnover and transaction costs, or could force the Fund to liquidate investments at disadvantageous times or prices, therefore adversely affecting the Fund as well as the value of your investment. The amount of assets deemed illiquid remaining within the Fund may also increase, making it more difficult to meet shareholder redemptions and further adversely affecting the value of the Fund. How specific fixed-income securities may react to changes in interest rates will depend on the specific characteristics of each security. Fixed-income securities are also subject to credit risk, prepayment risk, valuation risk, extension risk, and liquidity risk. Credit risk is the risk that the credit strength of an issuer of a fixed-income security will weaken and/or that the issuer will be unable to make timely principal and interest payments and that the security may go into default. Prepayment risk is the risk that during periods of falling interest rates, certain fixed-income securities with higher interest rates, such as mortgage- and asset-backed securities, may be prepaid by their issuers thereby reducing the amount of interest payments. Valuation risk is the risk that one or more of the fixed-income securities in which the Fund invests are priced differently than the value realized upon such security’s sale. In times of market instability, valuation may be more difficult. Extension risk is the risk that borrowers may pay off their debt obligations more slowly in times of rising interest rates, which will lengthen the duration of the portfolio. Liquidity risk is the risk that fixed-income securities may be difficult or impossible to sell at the time that the portfolio managers would like or at the price the portfolio managers believe the security is currently worth.
Foreign Exposure Risk.  The Fund may have exposure to foreign markets as a result of its investments in foreign securities, including investments in emerging markets, which can be more volatile than the U.S. markets. As a result, its returns and net asset value may be affected to a large degree by fluctuations in currency exchange rates or political or economic conditions in a particular country. In some foreign markets, there may not be protection against failure by other parties to complete transactions. It may not be possible for the Fund to repatriate capital, dividends, interest, and other income from a particular country or governmental entity. In addition, a market swing in one or more countries or regions where the Fund has invested a significant amount of its assets may have a greater effect on the Fund’s performance than it would in a more geographically diversified portfolio. To the extent the Fund invests in foreign debt securities, such investments are sensitive to changes in interest rates. Additionally, investments in securities of foreign governments involve the risk that a foreign government may
32  Janus Henderson Growth and Income Fund

not be willing or able to pay interest or repay principal when due. The Fund’s investments in emerging market countries may involve risks greater than, or in addition to, the risks of investing in more developed countries.
Derivatives Risk.  Derivatives can be highly volatile and involve risks in addition to the risks of the underlying referenced securities or asset. Gains or losses from a derivative investment can be substantially greater than the derivative’s original cost, and can therefore involve leverage. Leverage may cause the Fund to be more volatile than if it had not used leverage. Derivatives can be less liquid than other types of investments and entail the risk that the counterparty will default on its payment obligations. The Fund may use derivatives for hedging purposes. Hedging with derivatives may increase expenses, and there is no guarantee that a hedging strategy will work. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains or cause losses if the market moves in a manner different from that anticipated by the portfolio managers or if the cost of the derivative outweighs the benefit of the hedge.
Sector Risk.  At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business within an economic sector. Companies in the same economic sector may be similarly affected by economic or market events, making the Fund more vulnerable to unfavorable developments in that economic sector than funds that invest more broadly. As the Fund’s portfolio becomes more concentrated, the Fund is less able to spread risk and potentially reduce the risk of loss and volatility. In addition, the Fund may be overweight or underweight in certain sectors relative to its benchmark index, which may cause the Fund’s performance to be more or less sensitive to developments affecting those sectors.
Securities Lending Risk.  The Fund may seek to earn additional income through lending its securities to certain qualified broker-dealers and institutions. There is the risk that when portfolio securities are lent, the securities may not be returned on a timely basis, and the Fund may experience delays and costs in recovering the security or gaining access to the collateral provided to the Fund to collateralize the loan. If the Fund is unable to recover a security on loan, the Fund may use the collateral to purchase replacement securities in the market. There is a risk that the value of the collateral could decrease below the cost of the replacement security by the time the replacement investment is made, resulting in a loss to the Fund.
Management Risk.  The Fund is an actively managed investment portfolio and is therefore subject to the risk that the investment strategies employed for the Fund may fail to produce the intended results. The Fund may underperform its benchmark index or other mutual funds with similar investment objectives.
An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The following information provides some indication of the risks of investing in the Fund by showing how the Fund’s performance has varied over time. Class T Shares (formerly named Class J Shares, the initial share class) of the Fund commenced operations with the Fund’s inception. Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund commenced operations on July 6, 2009. Class N Shares of the Fund commenced operations on August 4, 2017.
The performance shown for Class T Shares is calculated using the fees and expenses of Class T Shares in effect during the periods shown, net of any applicable fee and expense limitations or waivers.
The performance shown for Class A Shares, Class C Shares, Class S Shares, and Class R Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of each respective share class, without the effect of any fee and expense limitations or waivers.
The performance shown for Class I Shares for periods prior to July 6, 2009, reflects the performance of the Fund’s former Class J Shares, calculated using the fees and expenses of Class J Shares, net of any applicable fee and expense limitations or waivers.
The performance shown for Class N Shares for periods prior to August 4, 2017, reflects the performance of the Fund’s Class T Shares, calculated using the fees and expenses of Class T Shares, net of any applicable fee and expense limitations or waivers.
If Class A Shares, Class C Shares, Class S Shares, Class I Shares, and Class R Shares of the Fund had been available during periods prior to July 6, 2009, or Class N Shares of the Fund had been available during periods prior to August 4, 2017, the performance shown for each respective share class may have been different. The performance shown for the periods following
33  Janus Henderson Growth and Income Fund

the Fund’s commencement of Class A Shares, Class C Shares, Class S Shares, Class I Shares, Class N Shares, and Class R Shares reflects the fees and expenses of each respective share class, net of any applicable fee and expense limitations or waivers.
The bar chart depicts the change in performance from year to year during the periods indicated. The bar chart figures do not include any applicable sales charges that an investor may pay when they buy or sell Class A Shares or Class C Shares of the Fund. If sales charges were included, the returns would be lower. The table compares the Fund’s average annual returns for the periods indicated to a broad-based securities market index. All figures assume reinvestment of dividends and distributions. For certain periods, the Fund’s performance reflects the effect of expense waivers. Without the effect of these expense waivers, the performance shown would have been lower.
The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. Updated performance information is available at janushenderson.com/performance or by calling 1-877-335-2687.
Annual Total Returns for Class T Shares (calendar year-end)

    
Best Quarter: 2nd Quarter 2009 18.72% Worst Quarter: 3rd Quarter 2011 – 19.76%
  
    
Average Annual Total Returns (periods ended 12/31/18)
  1 Year 5 Years 10 Years Since
Inception
(5/15/91)
Class T Shares        
Return Before Taxes – 2.07% 9.20% 13.51% 10.42%
Return After Taxes on Distributions – 3.76% 7.56% 12.53% 9.30%
Return After Taxes on Distributions and Sale of Fund Shares(1)