Baron Partners Fund

Investment Goal

The investment goal of Baron Partners Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. 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:

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 for Fund shareholders. These costs, which are not reflected in Total Annual Fund Operating

Baron Partners Fund

Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 9.14% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a non-diversified fund that invests for the long term primarily in equity securities in the form of common stock of U.S. growth companies of any market capitalization. BAMCO, Inc. (“BAMCO” or the “Adviser”) seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation. To take advantage of opportunities to invest, the Fund may borrow money from banks (leverage) in an amount up to one-third of its total assets, which include assets purchased with borrowed money.

Principal Risks of Investing in the Fund

Non-Diversified Portfolio.  The Fund is non-diversified, which means it will likely have a greater percentage of its assets in a single issuer than a diversified fund. As a result, a non-diversified fund will likely invest a greater percentage of its assets in fewer issuers, and the performance of those issuers may have a greater effect on the Fund’s performance compared to a diversified fund. Thus, a non-diversified fund is more likely to experience significant fluctuations in value, exposing the Fund to a greater risk of loss in any given period than a diversified fund. As of the date of this prospectus, about 49% of the Fund is invested in Tesla (“Tesla”) stock due to dramatic upward market movements in Tesla’s share price. For so long as the Fund maintains its investment in Tesla, the Fund’s performance will be significantly affected by the performance of Tesla stock and any decline in the price of Tesla stock would materially and adversely affect your investment in the Fund. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Tesla.  As of the date of this prospectus, about 49% of the Fund’s assets are invested in Tesla stock. Therefore, the Fund is exposed to the risk that were Tesla stock to lose significant value, which could happen rapidly, the Fund’s performance would be adversely affected. Before investing in the Fund, investors should carefully consider publicly available information about Tesla. There can be no assurances that the Fund will maintain its investment in Tesla, as the Adviser maintains discretion to actively manage the Fund’s portfolio, including by decreasing or liquidating the Fund’s investment in Tesla at any time. However, for so long as the Fund maintains a substantial investment in Tesla, the Fund’s performance will be significantly affected

Baron Partners Fund

by the performance of Tesla stock and any decline in the price of Tesla stock would materially and adversely affect your investment in the Fund.

Single Issuer.  Single issuer risk is the possibility that factors specific to an issuer to which the Fund is exposed will affect the market prices of the issuer’s securities and therefore the net asset value of the Fund. Due to the size of the Fund’s investment in Tesla, about 49% of its assets as of the date of this prospectus, the net asset value of the Fund will be materially impacted by the price of Tesla stock. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Industry Concentration.  From time to time, market fluctuations in the value of the Fund’s investments, combined with the Fund’s non-diversified portfolio, may result in the Fund being concentrated in the securities of a single issuer or a small number of issuers, including in a particular industry. As a result, the Fund will be particularly exposed to the risks of that company or industry relative to the risk exposure of investment companies holding a diversified portfolio of securities or those that seek to maintain near-index weightings in their portfolio securities. Accordingly, in those cases, the Fund will be disproportionately exposed to the market conditions, interest rates, and economic, regulatory, or financial developments that significantly affect that company or industry. For example, due to the size of the Fund’s investment in Tesla, Inc., which represents about 49% of its assets as of the date of this prospectus, the Fund will be adversely impacted by developments affecting the automotive and energy industries, as well as governmental environmental regulations. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Leverage.  The Fund borrows money from banks to buy securities and pledge its assets in connection with the borrowing. If the interest expense of the borrowing is greater than the return on the securities bought, the use of leverage will decrease the return to shareholders in the Fund. Use of leverage also tends to magnify the volatility of the Fund’s returns. The greater the use of leverage by the Fund, the greater the risk of the volatility of the Fund’s returns.

Growth Investing.  Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

Consumer Discretionary Sector.  The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income, consumer preferences, social trends and marketing campaigns.

Baron Partners Fund

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence caused, among other reasons, by increased inflation, or tightening monetary policy or interest rate increases by the US Federal Reserve or similar international bodies, and reduced liquidity in financial markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Industrials Sector.  The Fund’s investments are exposed to issuers conducting business in the Industrials Sector. The Industrials Sector includes manufacturers and distributors of capital goods such as aerospace and defense, building projects, electrical equipment and machinery and companies that offer construction and engineering services. It also includes providers of commercial and professional services including printing, environmental and facilities services, office services and supplies, security and alarm services, human resource and employment services, research and consulting services. It also includes companies that provide transportation services. The Fund is subject to the risk that the securities of such issuers will underperform the market as a whole due to legislative or regulatory changes, adverse market conditions and/or increased competition affecting the Industrials Sector. The prices of the securities of companies operating in the Industrials Sector may fluctuate due to the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, liability for environmental damage, depletion of resources, and mandated expenditures for safety and pollution control devices.

Risks of Emphasizing a Sector or Industry.  If the Fund has invested a higher percentage of its total assets in a particular sector or industry, changes affecting that sector or industry may have a significant impact on the performance of the Fund’s

Baron Partners Fund

overall portfolio. The economies and financial markets of certain regions — such as Latin America, Asia, and Europe and the Mediterranean region — can be interdependent and may all decline at the same time.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Performance

Although Baron Partners Fund was registered as a mutual fund on April 30, 2003, it has been managed in the same style and by the same portfolio manager since the predecessor partnership’s inception on January 31, 1992, and since its conversion to a Delaware statutory trust structure on April 30, 2003. The Fund’s investment goals, policies, guidelines and restrictions are, in all material respects, equivalent to the predecessor partnership’s. The following information shows the Fund’s annual returns and long-term performance reflecting the actual fees and expenses that were charged when the Fund was a partnership and since it converted to a mutual fund. The predecessor partnership charged a 20% performance fee after it reached a certain performance benchmark. If the annual returns for the Fund did not reflect the performance fee for the years the partnership charged a performance fee, the returns would have been higher. The Fund does not charge a performance fee. From its inception on January 31, 1992 through April 30, 2003, the predecessor partnership was not subject to certain investment restrictions, diversification requirements and other restrictions of the Investment Company Act of 1940, as amended (the “1940 Act”), or the Internal Revenue Code of 1986, as amended (the “Code”), which if they had been applicable, might have adversely affected its performance. The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1, 5, 10 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Baron Partners Fund

Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON (1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Average Annual Total Returns (for periods ended 12/31/21)

The following table shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes), which includes its predecessor partnership’s average annual returns, and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes. Because the predecessor partnership did not have a distribution policy prior to May 1, 2003, the Fund is unable to show after-tax returns prior to that date.

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares

Baron Partners Fund

in a tax-deferred account (including a
401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Average Annual Total Returns for the periods ended December 31, 2021

The Russell Midcap^® Growth Index is an unmanaged index of mid-cap growth companies. The S&P 500 Index is an unmanaged index of larger-cap companies.

Management

Investment Adviser.  BAMCO is the investment adviser of the Fund.

Portfolio Manager.  Ronald Baron has been the Lead Portfolio Manager of the Fund since its inception on April 30, 2003. Prior to that, he was the portfolio manager of the predecessor partnership from its inception on January 31, 1992 to April 30, 2003. Michael Baron has been the co-manager of the Fund since August 28, 2018. Mr. Ronald Baron founded the Adviser in 1987. Mr. Michael Baron joined the Adviser as a research analyst in September of 2004.

Baron Partners Fund

Purchase and Sale of Fund Shares

Shares may be purchased only on days that the New York Stock Exchange is open for trading.

Baron Partners Fund

You Can Purchase or Redeem Shares By:

The Fund is not for short-term traders who intend to purchase and then sell their Fund shares within a 90 day period. If the Adviser reasonably believes that a person is not a long-term investor, it will attempt to prohibit that person from making additional investments in the Fund.

Tax Information

Distributions of the Fund’s net investment income (other than “qualified dividend income”) and distributions of net short-term capital gains will be taxable to you as ordinary income. Distributions of the Fund’s net capital gains reported as capital gain dividends by the Fund will be taxable to you as long-term capital gains, regardless of the length of time you have held shares of the Fund. If you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, you may be subject to federal income tax on withdrawals from tax-deferred arrangement at a later date.

Baron Partners Fund

Financial Intermediary Compensation

If you purchase Retail or Institutional Shares of the Fund through a broker, dealer or other financial intermediary (such as a bank or financial adviser), the Fund, Baron Capital, Inc., the Fund’s distributor, BAMCO or their affiliates 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 financial intermediary, including your salesperson, to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Baron Focused Growth Fund

Investment Goal

The investment goal of Baron Focused Growth Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. 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:

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 for Fund shareholders. These costs, which are not reflected in Total Annual Fund Operating

Baron Focused Growth Fund

Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 45.28% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a non-diversified fund that invests for the long term primarily in equity securities in the form of common stock of U.S. small- and mid-sized growth companies. The Adviser defines small- and mid-sized companies as those, at the time of purchase, with market capitalizations up to the largest market cap stock in the Russell Midcap Growth Index at reconstitution. The Adviser seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation. Because of its long-term approach, the Fund could have a significant percentage of its assets invested in securities that have appreciated beyond their original market cap ranges.

Principal Risks of Investing in the Fund

Non-Diversified Portfolio.  The Fund is non-diversified, which means it will likely have a greater percentage of its assets in a single issuer than a diversified fund. As a result, a non-diversified fund will likely invest a greater percentage of its assets in fewer issuers, and the performance of those issuers may have a greater effect on the Fund’s performance compared to a diversified fund. Thus, a non-diversified fund is more likely to experience significant fluctuations in value, exposing the Fund to a greater risk of loss in any given period than a diversified fund. As of the date of this prospectus, about 27% of the Fund is invested in Tesla (“Tesla”) stock due to dramatic upward market movements in Tesla’s share price. For so long as the Fund maintains its investment in Tesla, the Fund’s performance will be significantly affected by the performance of Tesla stock and any decline in the price of Tesla stock would materially and adversely affect your investment in the Fund. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Tesla. As of the date of this prospectus, about 27% of the Fund’s assets are invested in Tesla stock. Therefore, the Fund is exposed to the risk that were Tesla stock to lose significant value, which could happen rapidly, the Fund’s performance would be adversely affected. Before investing in the Fund, investors should carefully consider publicly available information about Tesla. There can be no assurances that the Fund will maintain its investment in Tesla, as the Adviser maintains discretion to actively manage the Fund’s portfolio, including by decreasing or liquidating the Fund’s investment in Tesla at any time. However, for so long as the Fund maintains a

Baron Focused Growth Fund

substantial investment in Tesla, the Fund’s performance will be significantly affected by the performance of Tesla stock and any decline in the price of Tesla stock would materially and adversely affect your investment in the Fund.

Single Issuer. Single issuer risk is the possibility that factors specific to an issuer to which the Fund is exposed will affect the market prices of the issuer’s securities and therefore the net asset value of the Fund. Due to the size of the Fund’s investment in Tesla, about 27% of its assets as of the date of this prospectus, the net asset value of the Fund will be materially impacted by the price of Tesla stock. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Industry Concentration. From time to time, market fluctuations in the value of the Fund’s investments, combined with the Fund’s non-diversified portfolio, may result in the Fund being concentrated in the securities of a single issuer or a small number of issuers, including in a particular industry. As a result, the Fund will be particularly exposed to the risks of that company or industry relative to the risk exposure of investment companies holding a diversified portfolio of securities or those that seek to maintain near-index weightings in their portfolio securities. Accordingly, in those cases, the Fund will be disproportionately exposed to the market conditions, interest rates, and economic, regulatory, or financial developments that significantly affect that company or industry. For example, due to the size of the Fund’s investment in Tesla, Inc., which represents about 27% of its assets as of the date of this prospectus, the Fund will be adversely impacted by developments affecting the automotive and energy industries, as well as governmental environmental regulations. (Please see “Tesla” in the “Principal Risks of Investing in the Fund” section.)

Growth Investing. Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

Consumer Discretionary Sector.  The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income, consumer preferences, social trends and marketing campaigns.

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence caused, among other reasons, by increased inflation, or tightening monetary policy or interest rate increases by the US Federal Reserve or similar international bodies, and reduced liquidity in financial

Baron Focused Growth Fund

markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Risks of Emphasizing a Sector or Industry.  If the Fund has invested a higher percentage of its total assets in a particular sector or industry, changes affecting that sector or industry may have a significant impact on the performance of the Fund’s overall portfolio. The economies and financial markets of certain regions — such as Latin America, Asia, and Europe and the Mediterranean region — can be interdependent and may all decline at the same time.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Performance

Although Baron Focused Growth Fund was registered as a mutual fund on June 30, 2008, it has been managed in the same style and by the same portfolio manager since the predecessor partnership’s inception on May 31, 1996. The Fund was added as a series of Baron Select Funds, a Delaware statutory trust, on June 30, 2008. The Fund’s investment goals, policies, guidelines and restrictions are, in all material respects, equivalent to the predecessor partnership’s. The following information

Baron Focused Growth Fund

shows the Fund’s annual returns and long-term performance reflecting the actual fees and expenses that were charged when the Fund was a partnership and since it converted to a mutual fund. The predecessor partnership charged a 15% performance fee after it reached a certain performance benchmark. If the annual returns for the Fund did not reflect the performance fee for the years the partnership charged a performance fee, the returns would have been higher. The Fund does not charge a performance fee. From its inception on May 31, 1996 through June 30, 2008, the predecessor partnership was not subject to certain investment restrictions, diversification requirements and other restrictions of the Investment Company Act of 1940, as amended (the “1940 Act”), or the Internal Revenue Code of 1986, as amended (the “Code”), which if they had been applicable, might have adversely affected its performance. The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1, 5, 10 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON (1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Baron Focused Growth Fund

Average Annual Total Returns (for periods ended 12/31/21)

The following table below shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes), which includes its predecessor partnership’s average annual returns, and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes. Because the predecessor partnership did not have a distribution policy prior to July 1, 2008, the Fund is unable to show after-tax returns prior to that date.

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares in a tax-deferred account (including a
401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Average Annual Total Returns for the periods ended December 31, 2021

Baron Focused Growth Fund

The Russell 2500^™ Growth Index is an unmanaged index of small to mid-cap growth companies. The S&P 500 Index is an unmanaged index of larger-cap companies.

Management

Investment Adviser.  BAMCO is the investment adviser of the Fund.

Portfolio Manager.  Ronald Baron has been the Lead Portfolio Manager of the Fund since its inception on June 30, 2008. Prior to that, he was the portfolio manager of the predecessor partnership from its inception on May 31, 1996 to June 30, 2008. David Baron has been the co-manager of the Fund since August 28, 2018. Mr. Ronald Baron founded the Adviser in 1987. Mr. David Baron joined the Adviser as a research analyst in July of 2005.

Purchase and Sale of Fund Shares

Shares may be purchased only on days that the New York Stock Exchange is open for trading.

Baron Focused Growth Fund

You Can Purchase or Redeem Shares By:

The Fund is not for short-term traders who intend to purchase and then sell their Fund shares within a 90 day period. If the Adviser reasonably believes that a person is not a long-term investor, it will attempt to prohibit that person from making additional investments in the Fund.

Tax Information

Distributions of the Fund’s net investment income (other than “qualified dividend income”) and distributions of net short-term capital gains will be taxable to you as ordinary income. Distributions of the Fund’s net capital gains reported as capital gain dividends by the Fund will be taxable to you as long-term capital gains, regardless of the length of time you have held shares of the Fund. If you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, you may be subject to federal income tax on withdrawals from tax-deferred arrangement at a later date.

Baron Focused Growth Fund

Financial Intermediary Compensation

If you purchase Retail or Institutional Shares of the Fund through a broker, dealer or other financial intermediary (such as a bank or financial adviser), the Fund, Baron Capital, Inc., the Fund’s distributor, BAMCO or their affiliates 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 financial intermediary, including your salesperson, to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Baron International Growth Fund

Investment Goal

The investment goal of Baron International Growth Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each

Baron International Growth Fund

year and that the Fund’s operating expenses remain the same, giving effect to the expense reimbursement agreement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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 for Fund shareholders. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 36.00% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a diversified fund that invests for the long term primarily in equity securities in the form of common stock of non-U.S. growth companies. Non-U.S. securities include securities that the Adviser determines are “non-U.S.” based on the consideration of an issuer’s domicile, its principal place of business, its primary stock exchange listing, the source of its revenue or other factors. The Fund seeks to diversify its investments among several developed countries and developing countries throughout the world, although the Fund may only invest up to 35% of its net assets in developing countries. Developing countries include countries in the MSCI Emerging Markets (EM) Index, countries in the MSCI Frontier Markets (FM) Index and other countries determined by the Adviser to be developing countries based on classifications made by the International Monetary Fund or on country characteristics similar to those of the countries in the EM and FM Indexes. The Fund may purchase securities of companies of any market capitalization. The Adviser seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation.

The Fund’s investments in non-U.S. securities generally are traded in currencies other than U.S. dollars, so the Adviser buys and sells foreign currencies to facilitate transactions in portfolio securities. The Adviser usually does not hedge against possible fluctuations in exchange rates, but exposure to a particular currency that the Adviser believes is overvalued may be hedged if the Fund has a substantial position in

Baron International Growth Fund

securities traded in that currency. The Fund may buy and sell currencies for cash at current exchange rates, or use an agreement to purchase or sell a specified currency at a specified future date or within a specified time period, at a price set at the time of the contract.

Principal Risks of Investing in the Fund

Non-U.S. Securities.  Investing in non-U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.

Developing Countries.  The Fund invests in developing countries, which include countries in the MSCI Emerging Markets (EM) Index, countries in the MSCI Frontier Markets (FM) Index and other countries determined by the Adviser to be developing countries based on classifications made by the International Monetary Fund or on country characteristics similar to those of the countries in the EM and FM Indexes. Investments in developing countries are subject to all of the risks of non-U.S. investing generally, and have additional heightened risks due to a lack of established legal, political, business and social frameworks to support securities markets, including: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasiveness of corruption and crime; currency exchange rate volatility; and inflation, deflation or currency devaluation. These risks are greater for countries in the FM Index.

Currency.  This refers to a decline in the value of a foreign currency versus the U.S. dollar, which reduces the dollar value of securities denominated in that currency. The overall impact on the Fund’s holdings can be significant, unpredictable and long-lasting, depending on the currencies represented in the portfolio and how each one appreciates or depreciates in relation to the U.S. dollar and whether currency positions are hedged. Under normal conditions, the Fund does not engage in extensive foreign currency hedging programs. Further, because exchange rate movements are volatile, the Fund’s attempts at hedging could be unsuccessful, and it may not be possible to effectively hedge the currency risks of many developing countries.

Growth Investing.  Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of,

Baron International Growth Fund

among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence and reduced liquidity in financial markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Risks Associated with China and Hong Kong.  The Fund may obtain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (“VIEs”). Instead of directly owning the equity securities of a Chinese company, a VIE enters into service and other contracts with the Chinese company. Although the VIE has no equity ownership of the Chinese company, the contractual arrangements permit the VIE to consolidate the Chinese company into its financial statements. VIE investments are subject to the risk that any breach of these contractual arrangements will be subject to Chinese law and jurisdiction, that Chinese law may be interpreted or change in a way that affects the enforceability of the VIE’s arrangements, or that contracts between the Chinese company and the VIE may otherwise not be enforceable under Chinese law.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to

Baron International Growth Fund

year and by showing how the Fund’s average annual returns for 1, 5, 10 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON
(1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Average Annual Total Returns (for periods ended 12/31/21)

The following table below shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes) and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes.

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares in a tax-deferred account (including a 401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Baron International Growth Fund

Average Annual Total Returns for the periods ended December 31, 2021

The MSCI AC World ex USA Index Net USD and the MSCI AC World ex USA IMI Growth Index Net USD are unmanaged, free float-adjusted market capitalization weighted indexes. Both the MSCI AC World ex USA Index Net USD and the MSCI AC World ex USA IMI Growth Index Net USD are designed to measure the performance of large-, mid-, and small-cap securities across developed and emerging markets, excluding the United States. The MSCI AC World ex USA IMI Growth Index Net USD screens for growth-style securities.

Management

Investment Adviser.  BAMCO is the investment adviser of the Fund.

Portfolio Manager.  Michael Kass has been the portfolio manager of the Fund since its inception on December 31, 2008. Mr. Kass has worked at the Adviser as an analyst since November of 2007.

Baron International Growth Fund

Purchase and Sale of Fund Shares

Shares may be purchased only on days that the New York Stock Exchange is open for trading.

Baron International Growth Fund

You Can Purchase or Redeem Shares By:

The Fund is not for short-term traders who intend to purchase and then sell their Fund shares within a 90 day period. If the Adviser reasonably believes that a person is not a long-term investor, it will attempt to prohibit that person from making additional investments in the Fund.

Tax Information

Distributions of the Fund’s net investment income (other than “qualified dividend income”) and distributions of net short-term capital gains will be taxable to you as ordinary income. Distributions of the Fund’s net capital gains reported as capital gain dividends by the Fund will be taxable to you as long-term capital gains, regardless of the length of time you have held shares of the Fund. If you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, you may be subject to federal income tax on withdrawals from tax-deferred arrangement at a later date.

Financial Intermediary Compensation

If you purchase Retail or Institutional Shares of the Fund through a broker, dealer or other financial intermediary (such as a bank or financial adviser), the Fund, Baron Capital, Inc., the Fund’s distributor, BAMCO or their affiliates 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 financial intermediary, including your salesperson, to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Baron Real Estate Fund

Investment Goal

The investment goal of Baron Real Estate Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. 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:

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 for Fund shareholders. These costs, which are not reflected in Total Annual Fund Operating

Baron Real Estate Fund

Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 64.39% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a diversified fund that, under normal circumstances, invests 80% of its net assets for the long term in equity securities in the form of common stock of U.S. and non-U.S. real estate and real estate-related companies of any market capitalization, and in companies which, in the opinion of BAMCO, Inc. (“BAMCO” or the “Adviser”), own significant real estate assets at the time of investment (“real estate companies”), however, investments in non-U.S. securities are limited to 35% of the Fund’s total assets at the time of purchase. The Adviser seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation.

Real estate companies are companies that the Adviser determines are in the real estate industry based on their involvement in construction, ownership, management, operation, financing, refinancing, sales, leasing, development or rehabilitation of real estate or are in a real estate-related industry based on their provision of goods or services to the real estate industry.

A company is considered to own significant real estate assets if, in the opinion of the Adviser, the company has a substantial portion of its assets attributable to one or more of the following: (a) real estate owned or leased by the company as lessor or as lessee; or (b) the discounted value of the stream of fees or revenues derived from the management or operation of real estate.

Examples of companies that might qualify under one of these categories include:

Baron Real Estate Fund

The Fund will invest more than 25% of its net assets in the real estate industry.

The investment policy of the Fund relating to the types of securities in which 80% of the Fund’s assets must be invested may be changed by the Fund’s Board of Trustees without shareholder approval upon at least 60 days’ notice.

Principal Risks of Investing in the Fund

Real Estate Industry.  In addition to general market conditions, the value of the Fund will be affected by the strength of the real estate markets. Factors that could affect the value of the Fund’s holdings include the following: overbuilding and increased competition; increases in property taxes and operating expenses; declines in the value of real estate; lack of availability of equity and debt financing to refinance maturing debt; vacancies due to economic conditions and tenant bankruptcies; losses due to costs resulting from environmental contamination and its related clean-up; changes in interest rates; changes in zoning laws; casualty or condemnation losses; variations in rental income; changes in neighborhood values; and functional obsolescence and appeal of properties to tenants.

Concentration.  The Fund’s strategy of concentrating in real estate and real estate-related companies means that its performance will be closely tied to the performance of a particular market segment. The Fund’s concentration in these companies may present more risks than if it were broadly diversified over numerous industries and sectors of the economy. A downturn in these companies would have a larger impact on the Fund than on a mutual fund that does not concentrate in such companies. At times, the performance of these companies will lag the performance of other industries or the broader market as a whole.

Growth Investing.  Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

Consumer Discretionary Sector.  The consumer discretionary sector may be affected by changes in domestic and international economies, exchange and interest rates, competition, consumers’ disposable income, consumer preferences, social trends and marketing campaigns.

Baron Real Estate Fund

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence caused, among other reasons, by increased inflation, or tightening monetary policy or interest rate increases by the US Federal Reserve or similar international bodies, and reduced liquidity in financial markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Non-U.S. Securities.  Investing in non-U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1, 5, 10 years, and

Baron Real Estate Fund

since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON (1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Average Annual Total Returns (for periods ended 12/31/21)

The following table below shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes) and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes.

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares in a tax-deferred account (including a 401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Baron Real Estate Fund

Average Annual Total Returns for the periods ended December 31, 2021

The MSCI USA IMI Extended Real Estate Index Net USD is a custom index calculated by MSCI for, and as requested by, BAMCO. The index includes real estate and real estate-related GICS classification securities. The MSCI US REIT Index Net USD is a free float-adjusted market capitalization index that measures the performance of all equity REITs in the US equity market, except for specialty equity REITs that do not generate a majority of their revenue and income from real estate rental and leasing operations.

Management

Investment Adviser.  BAMCO is the investment adviser of the Fund.

Portfolio Manager.  Jeffrey A. Kolitch has been the portfolio manager of the Fund since its inception on December 31, 2009. Mr. Kolitch has worked at the Adviser as an analyst since September of 2005.

Baron Real Estate Fund

Purchase and Sale of Fund Shares

Shares may be purchased only on days that the New York Stock Exchange is open for trading.

Baron Real Estate Fund

You Can Purchase or Redeem Shares By:

The Fund is not for short-term traders who intend to purchase and then sell their Fund shares within a 90 day period. If the Adviser reasonably believes that a person is not a long-term investor, it will attempt to prohibit that person from making additional investments in the Fund.

Tax Information

Distributions of the Fund’s net investment income (other than “qualified dividend income”) and distributions of net short-term capital gains will be taxable to you as ordinary income. Distributions of the Fund’s net capital gains reported as capital gain dividends by the Fund will be taxable to you as long-term capital gains, regardless of the length of time you have held shares of the Fund. If you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, you may be subject to federal income tax on withdrawals from tax-deferred arrangement at a later date.

Baron Real Estate Fund

Financial Intermediary Compensation

If you purchase Retail or Institutional Shares of the Fund through a broker, dealer or other financial intermediary (such as a bank or financial adviser), the Fund, Baron Capital, Inc., the Fund’s distributor, BAMCO or their affiliates 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 financial intermediary, including your salesperson, to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Baron Emerging Markets Fund

Investment Goal

The investment goal of Baron Emerging Markets Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. 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:

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 for Fund

Baron Emerging Markets Fund

shareholders. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 33.10% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a diversified fund that, under normal circumstances, invests 80% of its net assets in equity securities in the form of common stock of growth companies domiciled, headquartered or whose primary business activities or principal trading markets are in developing countries. A developing country is a country included in the MSCI Emerging Markets (EM) Index and other countries determined by the Adviser to be developing countries based on classifications made by the International Monetary Fund or on country characteristics similar to those of the countries in the EM Index. The Fund may invest up to 20% of its net assets in developed countries and in frontier countries as defined by the MSCI Frontier Markets (FM) Index. The Fund’s investments will be in at least three different countries. The Fund may purchase securities of companies of any market capitalization. The Adviser seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation.

The Fund’s investments in developing countries generally are traded in currencies other than U.S. dollars, so the Adviser buys and sells foreign currencies to facilitate transactions in portfolio securities. The Adviser usually does not hedge against possible fluctuations in exchange rates, but exposure to a particular currency that the Adviser believes is overvalued may be hedged if the Fund has a substantial position in securities traded in that currency. The Fund may buy and sell currencies for cash at current exchange rates, or using an agreement to purchase or sell a specified currency at a specified future date or within a specified time period, at a price set at the time of the contract.

The investment policy of the Fund relating to the types of securities in which 80% of the Fund’s assets must be invested may be changed by the Fund’s Board of Trustees without shareholder approval upon at least 60 days’ notice.

Principal Risks of Investing in the Fund

Non-U.S. Securities.  Investing in non-U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.

Baron Emerging Markets Fund

Developing Countries.  The Fund invests in developing countries, which include countries in the MSCI Emerging Markets (EM) Index and other countries determined by the Adviser to be developing countries based on classifications made by the International Monetary Fund or on country characteristics similar to those of the countries in the EM Index. Investments in developing countries are subject to all of the risks of non-U.S. investing generally, and have additional heightened risks due to a lack of established legal, political, business and social frameworks to support securities markets, including: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasiveness of corruption and crime; currency exchange rate volatility; and inflation, deflation or currency devaluation.

Currency.  This refers to a decline in the value of a foreign currency versus the U.S. dollar, which reduces the dollar value of securities denominated in that currency. The overall impact on the Fund’s holdings can be significant, unpredictable and long-lasting, depending on the currencies represented in the portfolio and how each one appreciates or depreciates in relation to the U.S. dollar and whether currency positions are hedged. Under normal conditions, the Fund does not engage in extensive foreign currency hedging programs. Further, because exchange rate movements are volatile, the Fund’s attempts at hedging could be unsuccessful, and it may not be possible to effectively hedge the currency risks of many developing countries.

Risks Associated with China and Hong Kong.  The Fund may obtain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (“VIEs”). Instead of directly owning the equity securities of a Chinese company, a VIE enters into service and other contracts with the Chinese company. Although the VIE has no equity ownership of the Chinese company, the contractual arrangements permit the VIE to consolidate the Chinese company into its financial statements. VIE investments are subject to the risk that any breach of these contractual arrangements will be subject to Chinese law and jurisdiction, that Chinese law may be interpreted or change in a way that affects the enforceability of the VIE’s arrangements, or that contracts between the Chinese company and the VIE may otherwise not be enforceable under Chinese law.

Risks of Emphasizing a Region, Country, Sector or Industry.  If the Fund has invested a higher percentage of its total assets in a particular region, country, sector or industry, changes affecting that region, country, sector or industry may have a significant impact on the performance of the Fund’s overall portfolio.

Frontier Countries.  The Fund’s investments in frontier countries, which include countries in the MSCI Frontier Markets (FM) Index, are subject to all of the risks of non-U.S. investing generally and the risks of investing in developing countries, except that such risks are greater in frontier countries.

Baron Emerging Markets Fund

Growth Investing.  Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence caused, among other reasons, by increased inflation, or tightening monetary policy or interest rate increases by the US Federal Reserve or similar international bodies, and reduced liquidity in financial markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Baron Emerging Markets Fund

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1, 5, 10 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON (1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Average Annual Total Returns (for periods ended 12/31/21)

The following table below shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes) and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes.

Baron Emerging Markets Fund

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares in a tax-deferred account (including a
401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Average Annual Total Returns for the periods ended December 31, 2021

The MSCI EM (Emerging Markets) Index Net USD and the MSCI EM (Emerging Markets) IMI Growth Index Net USD are unmanaged, free float-adjusted market capitalization weighted indexes. The MSCI EM (Emerging Markets) Index Net USD is designed to measure the equity market performance of large- and mid-cap securities in emerging markets. The MSCI EM (Emerging Markets) IMI Growth Index Net USD is designed to measure the equity market performance of large-, mid-, and small-cap securities in the emerging markets. The MSCI EM (Emerging Markets) IMI Growth Index Net USD screens for growth-style securities.

Management

Investment Adviser.  BAMCO is the investment adviser of the Fund.

Portfolio Manager.  Michael Kass has been the portfolio manager of the Fund since its inception on December 31, 2010. Mr. Kass has worked at the Adviser as an analyst since November of 2007.

Baron Emerging Markets Fund

Purchase and Sale of Fund Shares

Shares may be purchased only on days that the New York Stock Exchange is open for trading.

Baron Emerging Markets Fund

You Can Purchase or Redeem Shares By:

The Fund is not for short-term traders who intend to purchase and then sell their Fund shares within a 90 day period. If the Adviser reasonably believes that a person is not a long-term investor, it will attempt to prohibit that person from making additional investments in the Fund.

Tax Information

Distributions of the Fund’s net investment income (other than “qualified dividend income”) and distributions of net short-term capital gains will be taxable to you as ordinary income. Distributions of the Fund’s net capital gains reported as capital gain dividends by the Fund will be taxable to you as long-term capital gains, regardless of the length of time you have held shares of the Fund. If you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, you may be subject to federal income tax on withdrawals from tax-deferred arrangement at a later date.

Baron Emerging Markets Fund

Financial Intermediary Compensation

If you purchase Retail or Institutional Shares of the Fund through a broker, dealer or other financial intermediary (such as a bank or financial adviser), the Fund, Baron Capital, Inc., the Fund’s distributor, BAMCO or their affiliates 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 financial intermediary, including your salesperson, to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Baron Global Advantage Fund

Investment Goal

The investment goal of Baron Global Advantage Fund (the “Fund”) is capital appreciation.

Fees and Expenses of the Fund

The table below describes the fees and expenses that you would pay if you bought and held shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

Annual Fund Operating Expenses

(Expenses that you pay each year as a percentage of the value of your investment)

Example

This 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 then redeem all of your shares at the end of those periods. 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:

Baron Global Advantage Fund

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 for Fund shareholders. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the example, affect the Fund’s performance. During the most recent fiscal year ended December 31, 2021, the Fund’s portfolio turnover rate was 23.73% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies of the Fund

The Fund is a diversified fund that, under normal circumstances, invests primarily in equity securities in the form of common stock of established and emerging markets companies located throughout the world, with capitalizations within the range of companies included in the MSCI ACWI Index Net USD. At all times, the Fund will have investments in equity securities of companies in at least three countries outside of the U.S. Under normal conditions, at least 40% of the Fund’s net assets will be invested in stocks of companies outside the U.S. (at least 30% if foreign market conditions are not favorable). The Adviser seeks to invest in businesses it believes have significant opportunities for growth, sustainable competitive advantages, exceptional management, and an attractive valuation.

Principal Risks of Investing in the Fund

Non-U.S. Securities.  Investing in non-U.S. securities may involve additional risks to those inherent in investing in U.S. securities, including exchange rate fluctuations, political or economic instability, the imposition of exchange controls, expropriation, limited disclosure and illiquid markets.

Developing Countries.  The Fund invests in developing countries, which include countries in the MSCI Emerging Markets (EM) Index, countries in the MSCI Frontier Markets (FM) Index and other countries determined by the Adviser to be developing countries based on classifications made by the International Monetary Fund or on country characteristics similar to those of the countries in the EM and FM Indexes. Investments in developing countries are subject to all of the risks of non-U.S. investing generally, and have additional heightened risks due to a lack of established legal, political, business and social frameworks to support securities markets, including: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasiveness of corruption and crime; currency exchange rate volatility; and inflation, deflation or currency devaluation. These risks are greater for countries in the FM Index.

Baron Global Advantage Fund

Currency.  This refers to a decline in the value of a foreign currency versus the U.S. dollar, which reduces the dollar value of securities denominated in that currency. The overall impact on the Fund’s holdings can be significant, unpredictable and long-lasting, depending on the currencies represented in the portfolio and how each one appreciates or depreciates in relation to the U.S. dollar and whether currency positions are hedged. Under normal conditions, the Fund does not engage in extensive foreign currency hedging programs. Further, because exchange rate movements are volatile, the Fund’s attempts at hedging could be unsuccessful, and it may not be possible to effectively hedge the currency risks of many developing countries.

Risks Associated with China and Hong Kong.  The Fund may obtain exposure to companies based or operated in China by investing through legal structures known as variable interest entities (“VIEs”). Instead of directly owning the equity securities of a Chinese company, a VIE enters into service and other contracts with the Chinese company. Although the VIE has no equity ownership of the Chinese company, the contractual arrangements permit the VIE to consolidate the Chinese company into its financial statements. VIE investments are subject to the risk that any breach of these contractual arrangements will be subject to Chinese law and jurisdiction, that Chinese law may be interpreted or change in a way that affects the enforceability of the VIE’s arrangements, or that contracts between the Chinese company and the VIE may otherwise not be enforceable under Chinese law.

Risks of Emphasizing a Region, Country, Sector or Industry.  If the Fund has invested a higher percentage of its total assets in a particular region, country, sector or industry, changes affecting that region, country, sector or industry may have a significant impact on the performance of the Fund’s overall portfolio. The economies and financial markets of certain regions — such as Latin America, Asia, and Europe and the Mediterranean region — can be interdependent and may all decline at the same time.

Growth Investing.  Growth stocks can react differently to issuer, political, market and economic developments than the market as a whole and other types of stocks. Growth stocks tend to be more expensive relative to their earnings or assets compared to other types of stocks. As a result, because growth stocks tend to be sensitive to changes in their earnings and to increasing interest rates and inflation, they tend to be more volatile than other types of stocks.

Technology.  Technology companies, including internet-related and information technology companies, as well as companies propelled by new technologies, may present the risk of rapid change and product obsolescence, and their successes may be difficult to predict for the long term. Some technology companies may be newly formed and have limited operating history and experience. Technology companies may also be adversely affected by changes in governmental policies, competitive

Baron Global Advantage Fund

pressures and changing demand. The securities of these companies may also experience significant price movements caused by disproportionate investor optimism or pessimism, with little or no basis in the companies’ fundamentals or economic conditions.

General Stock Market.  Fund losses may be incurred due to declines in one or more markets in which Fund investments are made. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). In addition, turbulence caused, among other reasons, by increased inflation, or tightening monetary policy or interest rate increases by the US Federal Reserve or similar international bodies, and reduced liquidity in financial markets may negatively affect many issuers, which could have an adverse effect on your Fund investment. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, recessions or other events could have a significant negative impact on global economic and market conditions. The coronavirus disease 2019 (COVID-19) global pandemic and the aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, have had negative impacts, and in many cases severe negative impacts, on markets worldwide. It is not known how long such impacts, or any future impacts of other significant events described above, will or would last, but there could be a prolonged period of global economic slowdown, which may impact your Fund investment.

Small- and Mid-Sized Companies.  The Adviser believes there is more potential for capital appreciation in small- and mid-sized companies, but there also may be more risk. Securities of small- and mid-sized companies may not be well known to most investors, and the securities may be less actively traded than those of large businesses. The securities of small- and mid-sized companies may fluctuate in price more widely than the stock market generally, and they may be more difficult to sell during market downturns. Small- and mid-sized companies rely more on the skills of management and on their continued tenure. Investing in small- and mid-sized companies requires a long-term outlook and may require shareholders to assume more risk and to have more patience than investing in the securities of larger, more established companies.

Baron Global Advantage Fund

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund (Retail Shares) by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1, 5 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.BaronFunds.com/performance or by calling 1-800-99BARON (1-800-992-2766).

Year by Year Total Return (%) as of December 31 of Each Year (Retail Shares)

Average Annual Total Returns (for periods ended 12/31/21)

The following table below shows the Fund’s Retail Shares’ annual returns and long-term performance (before and after taxes) and the change in value of broad-based market indexes over various periods ended December 31, 2021. The table also shows the average annual returns of the Fund’s Institutional Shares and R6 Shares, but it does not show after-tax returns.

After-tax returns are calculated using the highest individual federal marginal income tax rate in effect at the time of each distribution and assumed sale, but they do not include the impact of state and local taxes.

Baron Global Advantage Fund

Your actual after-tax returns depend on your own tax situation and may differ from those shown. After-tax returns reflect past tax effects and are not predictive of future tax effects. After-tax returns are not relevant to investors who hold their Fund shares in a tax-deferred account (including a
401(k) or IRA or Coverdell account), or to investors that are tax-exempt.

Average Annual Total Returns for the periods ended December 31, 2021