497
PIMCO Funds
Prospectus
July 31, 2023 (as supplemented September 29, 2023)
Credit Bond Funds
 
Inst
I-2
I-3
Admin
A
C
C-2
R
PIMCO Credit Opportunities
Bond Fund
PCARX
PPCRX
-
-
PZCRX
PCCRX
-
-
PIMCO Diversified Income
Fund
PDIIX
PDVPX
PDNIX
PDAAX
PDVAX
PDICX
-
-
PIMCO ESG Income Fund
PEGIX
PEGPX
PEGQX
 
PEGAX
PEGBX
 
 
PIMCO High YieId Fund
PHIYX
PHLPX
PHNNX
PHYAX
PHDAX
PHDCX
-
PHYRX
PIMCO High YieId Spectrum
Fund
PHSIX
PHSPX
PHFNX
-
PHSAX
PHSCX
-
-
PIMCO Income Fund
PIMIX
PONPX
PIPNX
PIINX
PONAX
PONCX
-
PONRX
PIMCO Long-Term Credit Bond
Fund
PTCIX
PLCPX
-
-
-
-
-
-
PIMCO Low Duration Credit
Fund
PSRIX
PSRPX
-
-
PSRZX
PSRWX
-
-
PIMCO Low Duration Income
Fund
PFIIX
PFTPX
PFNIX
-
PFIAX
PFNCX
PLDCX
-
PIMCO Preferred and CapitaI
Securities Fund
PFINX
PFPNX
PFNNX
-
PFANX
PFCJX
-
-
Neither the U.S. Securities and Exchange Commission nor the U.S. Commodity Futures Trading Commission has approved or disapproved these securities, or determined if this prospectus is truthfuI or compIete. Any representation to the contrary is a criminaI offense.

Table of Contents
 
Page
1
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46
47
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66
73
81
83
83
85
104
A-1
B-1


PIMCO Credit Opportunities Bond Fund

Investment Objective
The Fund seeks maximum total return, consistent with preservation of capital and prudent investment management.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Maximum Sales Charge (Load) Imposed on
Purchases (as a percentage of offering price)
None
None
None
3.75%
None
Maximum Deferred Sales Charge (Load) (as a
percentage of the lower of the original purchase
price or redemption price)
None
None
None
1.00%
1.00%
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Management Fees
0.90%
1.00%
1.10%
1.05%
1.05%
Distribution and/or Service (12b-1) Fees
N/A
N/A
N/A
0.25%
1.00%
Other Expenses(1)
0.01%
0.01%
0.01%
0.01%
0.01%
Total Annual Fund Operating Expenses
0.91%
1.01%
1.11%
1.31%
2.06%
Fee Waiver and/or Expense Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
Total Annual Fund Operating Expenses
After Fee Waiver and/or Expense
Reimbursement
0.91%
1.01%
1.06%
1.31%
2.06%
1
“Other Expenses” include interest expense of 0.01%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.90%, 1.00%, 1.05%,1.30% and 2.05% for Institutional Class, I-2, I-3, Class A and Class C shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Class A or Class C shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$93
$290
$504
$1,120
I-2
$103
$322
$558
$1,236
I-3
$108
$348
$607
$1,347
Class A
$503
$775
$1,066
$1,895
Class C
$309
$646
$1,108
$2,390
If you do not redeem your shares:
 
1 Year
3 Years
5 Years
10 Years
Class A
$503
$775
$1,066
$1,895
Class C
$209
$646
$1,108
$2,390
Portfolio Turnover
The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 158% of the average value of its portfolio.
Principal Investment Strategies
The Fund invests under normal circumstances at least 80% of its assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. Security selection, industry and sector allocation, and management of market risk within and across credit and corporate markets are expected to be the main drivers of returns over time. “Fixed Income Instruments” include bonds, debt securities, bank loans and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The average portfolio duration of this Fund normally varies within zero to six years. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates.
The Fund may invest in both investment grade and high yield securities (“junk bonds”) subject to a maximum of 50% of its total assets in securities rated below B- by Moody’s Investors Service, Inc. (“Moody’s”), or equivalently rated by Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or, if unrated, determined by PIMCO to be of comparable quality. In the event that ratings services assign different ratings to the same security, PIMCO will use the highest rating as the credit rating for that security. The Fund may invest, without limitation, in securities of foreign issuers and may also invest in securities and instruments that are economically tied to emerging market countries. The Fund will normally limit its foreign currency exposure (from

PIMCO Funds | Prospectus  1

PIMCO Credit Opportunities Bond Fund

non-U.S. dollar denominated securities or currencies) to 20% of its total assets. The Fund may invest up to 15% of its total assets in preferred securities, convertible securities and other equity-related instruments, including up to 10% of its total assets in common stock.
The Fund may invest, without limitation, in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities, subject to applicable law and any other restrictions described in the Fund’s prospectus or Statement of Additional Information. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). The “total return” sought by the Fund consists of income earned on the Fund’s investments, plus capital appreciation, if any, which generally arises from decreases in interest rates, foreign currency appreciation, or improving credit fundamentals for a particular sector or security.
Principal Risks
It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.
Interest Rate Risk:the risk that fixed income securities will fluctuate in value because of a change in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration
Call Risk:the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer’s credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment or may not realize the full anticipated earnings from the investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features
Credit Risk:the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, or the issuer or guarantor of collateral,  is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
High Yield Risk:the risk that high yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are subject to greater levels of credit, call and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments, and may be more volatile than higher-rated securities of similar maturity
Market Risk:the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk:the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk:the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Derivatives Risk:the risk of investing in derivative instruments (such as forwards, futures, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investments may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Over-the-counter (“OTC”) derivatives or other similar investments are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives or other similar investments. The primary credit risk on derivatives that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered fund’s use of derivatives and related instruments could potentially limit or impact the Fund’s ability to invest in derivatives, limit the Fund’s ability to employ certain strategies that use derivatives or other similar investments and/or adversely affect the value of derivatives or other similar investments and the Fund’s performance
Mortgage-Related and Other Asset-Backed Securities Risk:the risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk. The Fund may invest in any tranche of mortgage-related or other asset-backed securities, including junior and/or equity tranches (to the extent consistent with other of the Fund’s guidelines), which generally carry higher levels of the foregoing risks

2  Prospectus | PIMCO Funds

Prospectus

Foreign (Non-U.S.) Investment Risk:the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes, diplomatic developments or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers
Senior Loan Risk:the risk that investing in senior loans, including bank loans, exposes the Fund to heightened credit risk, call risk, settlement risk and liquidity risk. If an issuer of a senior loan prepays or redeems the loan prior to maturity, the Fund may have to reinvest the proceeds in instruments that pay lower interest rates. To the extent the Fund invests in senior loans that are covenant-lite obligations, the Fund may have fewer rights against a borrower (e.g., covenant-lite obligations may contain fewer maintenance covenants than other obligations, or no maintenance covenants) and may have a greater risk of loss on such investments as compared to investments in traditional loans
Emerging Markets Risk:the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Sovereign Debt Risk:the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer’s inability or unwillingness to make principal or interest payments in a timely fashion
Currency Risk:the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies
Equity Risk:the risk that the value of equity or equity-related securities may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity or equity-related securities generally have greater price volatility than fixed income securities
Convertible Securities Risk:as convertible securities share both fixed income and equity characteristics, they are subject to risks to which fixed income and equity investments are subject. These risks include equity risk, interest rate risk and credit risk
Leveraging Risk:the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile
than if it had not been leveraged. This means that leverage entails a heightened risk of loss
Management Risk:the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk:the risk of entering into short sales or other short positions, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale or other short position will not fulfill its contractual obligations, causing a loss to the Fund
LIBOR Transition Risk:the risk related to the anticipated discontinuation and replacement of the London Interbank Offered Rate (“LIBOR”). Certain instruments held by the Fund rely or relied in some fashion upon LIBOR. Although the transition process away from LIBOR for most instruments has been completed, some LIBOR use is continuing and there are potential effects related to the transition away from LIBOR or the continued use of LIBOR on the Fund, or on certain instruments in which the Fund invests, which can be difficult to ascertain and could result in losses to the Fund
Please see “Description of Principal Risks” in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund’s average annual returns compare with the returns of a broad-based securities market index and an index of similar funds. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund’s Institutional Class shares. Performance for Class A and Class C shares in the Average Annual Total Returns table reflects the impact of sales charges. The I-3 shares of the Fund have not commenced operations as of the date of this prospectus. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
The Fund’s broad-based securities market index is the ICE BofA SOFR Overnight Rate Index. The ICE BofA SOFR Overnight Rate Index tracks the performance of a synthetic asset paying SOFR to a stated maturity. The index is based on the assumed purchase at par of a synthetic instrument having exactly its stated maturity and with a coupon equal to that day’s fixing rate. That issue is assumed to be sold the following

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  3

PIMCO Credit Opportunities Bond Fund

business day (priced at a yield equal to the current day fixing rate) and rolled into a new instrument. SOFR (Secured Overnight Funding Rate) is an overnight rate (published in arrears) and was chosen by the Alternative Reference Rates Committee (“ARRC”) as the successor to the USD LIBOR (London Interbank Offered Rate). SOFR is secured (collateralized by Treasuries), calculated by the Federal Reserve Bank of New York, and transactions based. Prior to July 1, 2022, the Fund’s broad-based securities market index was the 3 Month USD LIBOR Index. The Fund’s new benchmark index was selected to replace the 3 Month USD LIBOR Index in light of the upcoming cessation of LIBOR. LIBOR is an average interest rate, determined by the ICE Benchmark Administration, that banks charge one another for the use of short-term money (3 months) in England’s Eurodollar market. The Lipper Absolute Return Bond Funds Average is a total return performance average of Funds tracked by Lipper, Inc. that aim for positive returns in all market conditions and invest primarily in debt securities. The funds are not benchmarked against a traditional long-only market index but rather have the aim of outperforming a cash or risk-free benchmark.
Performance for the Fund is updated daily and quarterly and may be obtained as follows: daily and quarterly updates on the net asset value and performance page at https://www.pimco.com/en-us/product-finder.

Calendar Year Total Returns — Institutional Class
Best Quarter
June 30, 2020
6.57%
Worst Quarter
March 31, 2020
-8.87%
Year-to-Date
June 30, 2023
3.27%
Average Annual Total Returns (for periods ended 12/31/22)
 
1 Year
5 Years
10 Years
Institutional Class Return Before Taxes
-3.31%
1.76%
2.43%
Institutional Class Return After Taxes on Distributions(1)
-4.75%
0.19%
0.83%
Institutional Class Return After Taxes on Distributions
and Sales of Fund Shares(1)
-1.96%
0.69%
1.16%
I-2 Return Before Taxes
-3.41%
1.64%
2.33%
Class A Return Before Taxes
-7.38%
0.56%
1.63%
Class C Return Before Taxes
-5.37%
0.60%
1.26%
ICE BofA SOFR Overnight Rate Index (reflects no
deductions for fees, expenses or taxes)(2)
1.66%
-
-
3 Month USD LIBOR Index (reflects no deductions for
fees, expenses or taxes)
1.80%
1.53%
1.03%
Lipper Absolute Return Bond Funds Average (reflects no
deductions for taxes)
-6.46%
0.89%
1.61%
1
After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.
2
ICE BofA SOFR Overnight Rate Index was first published on October 1, 2019.
Investment Adviser/Portfolio Managers
PIMCO serves as the investment adviser for the Fund. The Fund’s portfolio is jointly and primarily managed by Mark Kiesel and Christian Stracke. Mr. Kiesel is CIO Global Credit and a Managing Director of PIMCO and has managed the Fund since its inception in August 2011. Mr. Stracke is a Managing Director of PIMCO and has managed the Fund since October 2016.
Other Important Information Regarding Fund Shares
For important information about purchase and sale of Fund shares, tax information, and payments to broker-dealers and other financial intermediaries, please turn to the “Summary of Other Important Information Regarding Fund Shares” section on page 46 of this prospectus.

4  Prospectus | PIMCO Funds

PIMCO Diversified Income Fund

Investment Objective
The Fund seeks maximum total return, consistent with preservation of capital and prudent investment management.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Maximum Sales
Charge (Load)
Imposed on
Purchases (as a
percentage of
offering price)
None
None
None
None
3.75%
None
Maximum Deferred
Sales Charge (Load)
(as a percentage of
the lower of the
original purchase
price or redemption
price)
None
None
None
None
1.00%
1.00%
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Management Fees
0.75%
0.85%
0.95%
0.75%
0.90%
0.90%
Distribution and/or
Service (12b-1) Fees
N/A
N/A
N/A
0.25%
0.25%
1.00%
Other Expenses(1)
0.01%
0.01%
0.01%
0.01%
0.01%
0.01%
Total Annual
Fund Operating
Expenses
0.76%
0.86%
0.96%
1.01%
1.16%
1.91%
Fee Waiver and/or
Expense
Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
N/A
Total Annual
Fund Operating
Expenses After
Fee Waiver
and/or Expense
Reimbursement
0.76%
0.86%
0.91%
1.01%
1.16%
1.91%
1
“Other Expenses” include interest expense of 0.01%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.75%, 0.85%, 0.90%, 1.00%, 1.15% and 1.90% for Institutional Class, I-2, I-3, Administrative Class, Class A and Class C shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Administrative Class, Class A or Class C shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$78
$243
$422
$942
I-2
$88
$274
$477
$1,061
I-3
$93
$301
$526
$1,173
Administrative Class
$103
$322
$558
$1,236
Class A
$489
$730
$989
$1,731
Class C
$294
$600
$1,032
$2,233
If you do not redeem your shares:
 
1 Year
3 Years
5 Years
10 Years
Class A
$489
$730
$989
$1,731
Class C
$194
$600
$1,032
$2,233
Portfolio Turnover
The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 136% of the average value of its portfolio.
Principal Investment Strategies
The Fund seeks to achieve its investment objective by investing under normal circumstances at least 65% of its total assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The average portfolio duration of this Fund normally varies from three to eight years, based on PIMCO’s market forecasts. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates.

PIMCO Funds | Prospectus  5

PIMCO Diversified Income Fund

The Fund may invest in a diversified pool of corporate fixed income securities of varying maturities. The Fund may invest in both investment- grade securities and high yield securities (“junk bonds”) subject to a maximum of 10% of its total assets in securities rated below B by Moody’s Investors Service, Inc. (“Moody’s”), or equivalently rated by Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or, if unrated, determined by PIMCO to be of comparable quality. In the event that ratings services assign different ratings to the same security, PIMCO will use the highest rating as the credit rating for that security. In addition, the Fund may invest, without limitation, in fixed income securities and instruments that are economically tied to emerging market countries. The Fund may invest, without limitation, in securities denominated in foreign currencies and in U.S. dollar-denominated securities of foreign issuers.
The Fund may invest, without limitation, in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities, subject to applicable law and any other restrictions described in the Fund’s prospectus or Statement of Additional Information. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). The “total return” sought by the Fund consists of income earned on the Fund’s investments, plus capital appreciation, if any, which generally arises from decreases in interest rates, foreign currency appreciation, or improving credit fundamentals for a particular sector or security. The Fund may also invest up to 10% of its total assets in preferred securities.
Principal Risks
It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.
Interest Rate Risk:the risk that fixed income securities will fluctuate in value because of a change in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration
Call Risk:the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer’s credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment or may not realize the full anticipated earnings from the investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features
Credit Risk:the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative
contract, or the issuer or guarantor of collateral,  is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
High Yield Risk:the risk that high yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are subject to greater levels of credit, call and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments, and may be more volatile than higher-rated securities of similar maturity
Market Risk:the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk:the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk:the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Derivatives Risk:the risk of investing in derivative instruments (such as forwards, futures, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investments may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Over-the-counter (“OTC”) derivatives or other similar investments are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives or other similar investments. The primary credit risk on derivatives that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered fund’s use of derivatives and related instruments could potentially limit or impact the Fund’s ability to invest in derivatives, limit the Fund’s ability to employ certain strategies that use derivatives or other similar investments and/or adversely affect the

6  Prospectus | PIMCO Funds

Prospectus

value of derivatives or other similar investments and the Fund’s performance
Equity Risk:the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities
Mortgage-Related and Other Asset-Backed Securities Risk:the risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk. The Fund may invest in any tranche of mortgage-related or other asset-backed securities, including junior and/or equity tranches (to the extent consistent with other of the Fund’s guidelines), which generally carry higher levels of the foregoing risks
Foreign (Non-U.S.) Investment Risk:the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes, diplomatic developments or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers
Emerging Markets Risk:the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Sovereign Debt Risk:the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer’s inability or unwillingness to make principal or interest payments in a timely fashion
Currency Risk:the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies
Leveraging Risk:the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss
Management Risk:the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory, or tax
restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk:the risk of entering into short sales or other short positions, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale or other short position will not fulfill its contractual obligations, causing a loss to the Fund
LIBOR Transition Risk:the risk related to the anticipated discontinuation and replacement of the London Interbank Offered Rate (“LIBOR”). Certain instruments held by the Fund rely or relied in some fashion upon LIBOR. Although the transition process away from LIBOR for most instruments has been completed, some LIBOR use is continuing and there are potential effects related to the transition away from LIBOR or the continued use of LIBOR on the Fund, or on certain instruments in which the Fund invests, which can be difficult to ascertain and could result in losses to the Fund
Please see “Description of Principal Risks” in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The Fund measures its performance against a primary benchmark and a secondary benchmark. The Fund’s primary benchmark is the Bloomberg Global Credit Hedged USD Index. The Fund’s secondary benchmark is an equally weighted blend of the following three indices: Bloomberg Global Aggregate Credit ex Emerging Markets, USD Hedged; ICE BofAML BB-B Rated Developed Markets High Yield Constrained Index, USD Hedged; and JPMorgan EMBI Global, USD Hedged. The Fund believes the secondary benchmark reflects the Fund’s investment strategy more accurately than the Bloomberg Global Credit Hedged USD Index.
The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund’s average annual returns compare with the returns of a broad-based securities market index, the Fund’s secondary benchmark and an index of similar funds. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund’s Institutional Class shares. For periods prior to the inception date of I-3 shares (April 27, 2018), performance information shown in the table for that class is based on the performance of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses paid by that class of shares. Performance for Class A and Class C shares in the Average Annual Total

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  7

PIMCO Diversified Income Fund

Returns table reflects the impact of sales charges.The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
The Bloomberg Global Credit Hedged USD Index contains investment grade and high yield credit securities from the Multiverse represented in US Dollars on a hedged basis (Multiverse is the merger of two groups: the Global Aggregate and the Global High Yield). It is not possible to invest directly in an unmanaged index. The Bloomberg Global Aggregate Credit ex Emerging Markets (USD Hedged) provides a broad-based measure of the global developed markets investment-grade fixed income markets. The ICE BofAML BB-B Rated Developed Markets High Yield Constrained Index, USD Hedged tracks the performance of below investment grade bonds of corporate issuers domiciled in developed market countries rated BB1 through B3, based on an average of Moody’s, S&P and Fitch. Qualifying bonds are capitalization-weighted provided the total allocation to an individual issuer (defined by Bloomberg tickers) does not exceed 2%. Issuers that exceed the limit are reduced to 2% and the face value of each of their bonds is adjusted on a pro-rata basis. Similarly, the face value of bonds of all other issuers that fall below the 2% cap are increased on a pro-rata basis. The index is rebalanced on the last calendar day of the month. The JPMorgan EMBI Global (USD Hedged) tracks total returns for U.S. dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities, Brady bonds, loans, Eurobonds and local market instruments. The Lipper Multi-Sector Income Funds Average is a total return performance average of funds tracked by Lipper, Inc. that seek current income by allocating assets among several different fixed income securities sectors (with no more than 65% in any one sector except for defensive purposes), including U.S. government and foreign governments, with a significant portion of assets in securities rated below investment grade.
Performance for the Fund is updated daily and quarterly and may be obtained as follows: daily and quarterly updates on the net asset value and performance page at https://www.pimco.com/en-us/product-finder.

Calendar Year Total Returns — Institutional Class
Best Quarter
June 30, 2020
7.19%
Worst Quarter
June 30, 2022
-9.10%
Year-to-Date
June 30, 2023
3.53%
Average Annual Total Returns (for periods ended 12/31/22)
 
1 Year
5 Years
10 Years
Institutional Class Return Before Taxes
-13.77%
0.55%
2.48%
Institutional Class Return After Taxes on Distributions(1)
-15.44%
-1.18%
0.25%
Institutional Class Return After Taxes on Distributions
and Sales of Fund Shares(1)
-8.13%
-0.26%
0.95%
I-2 Return Before Taxes
-13.85%
0.45%
2.38%
I-3 Return Before Taxes
-13.90%
0.40%
2.33%
Administrative Class Return Before Taxes
-13.98%
0.30%
2.23%
Class A Return Before Taxes
-17.33%
-0.61%
1.69%
Class C Return Before Taxes
-15.58%
-0.60%
1.31%
Bloomberg Global Credit Hedged USD Index (reflects
no deductions for fees, expenses or taxes)
-13.75%
0.53%
2.26%
1/3 each - Bloomberg Global Aggregate Credit ex
Emerging Markets, USD Hedged; ICE BofAML BB-B
Rated Developed Markets High Yield Constrained
Index, USD Hedged; and JPMorgan EMBI Global, USD
Hedged (reflects no deductions for fees, expenses or
taxes)
-13.42%
0.64%
2.55%
Lipper Multi-Sector Income Funds Average (reflects no
deductions for taxes)
-10.50%
0.73%
2.23%
1
After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.
Investment Adviser/Portfolio Managers
PIMCO serves as the investment adviser for the Fund. The Fund’s portfolio is jointly and primarily managed by Daniel J. Ivascyn, Alfred Murata, Regina Borromeo, Sonali Pier and Charles Watford. Mr. Ivascyn is Group Chief Investment Officer and a Managing Director of PIMCO. Mr. Murata is a Managing Director of PIMCO. Mses. Pier and Borromero and Mr. Watford are Vice Presidents of PIMCO. Messrs. Ivascyn and Murata have managed the Fund since May 2016. Ms. Pier has managed the Fund since February 2017. Ms. Borromero and Mr. Watford have managed the Fund since December 2022.

8  Prospectus | PIMCO Funds

Prospectus

Other Important Information Regarding Fund Shares
For important information about purchase and sale of Fund shares, tax information, and payments to broker-dealers and other financial intermediaries, please turn to the “Summary of Other Important Information Regarding Fund Shares” section on page 46 of this prospectus.

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  9

PIMCO ESG Income Fund

Investment Objective
While incorporating PIMCO’s ESG investment strategy, the Fund‘s primary investment objective is to maximize current income. Long-term capital appreciation is a secondary objective.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Maximum Sales Charge (Load) Imposed on
Purchases (as a percentage of offering price)
None
None
None
3.75%
None
Maximum Deferred Sales Charge (Load) (as a
percentage of the lower of the original purchase
price or redemption price)
None
None
None
1.00%
1.00%
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Management Fees
0.50%
0.60%
0.70%
0.65%
0.65%
Distribution and/or Service (12b-1) Fees
N/A
N/A
N/A
0.25%
1.00%
Other Expenses(1)
0.05%
0.05%
0.05%
0.05%
0.05%
Total Annual Fund Operating Expenses
0.55%
0.65%
0.75%
0.95%
1.70%
Fee Waiver and/or Expense Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
Total Annual Fund Operating Expenses
After Fee Waiver and/or Expense
Reimbursement
0.55%
0.65%
0.70%
0.95%
1.70%
1
“Other Expenses” include interest expense of 0.04%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.51%, 0.61%, 0.66%, 0.91% and 1.66% for Institutional Class, I-2, I-3, Class A and Class C shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Class A, or Class C shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$56
$176
$307
$689
I-2
$66
$208
$362
$810
I-3
$72
$235
$412
$926
Class A
$468
$666
$881
$1,498
Class C
$273
$536
$923
$2,009
If you do not redeem your shares:
 
1 Year
3 Years
5 Years
10 Years
Class A
$468
$666
$881
$1,498
Class C
$173
$536
$923
$2,009
Portfolio Turnover
The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 320% of the average value of its portfolio.
Principal Investment Strategies
The Fund seeks to achieve its investment objectives by investing under normal circumstances at least 65% of its total assets in a multi-sector portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The Fund will seek to maintain a high and consistent level of dividend income by investing in a broad array of fixed income sectors and utilizing income efficient implementation strategies (i.e., the Fund will favor certain investments that offer consistent and high levels of income). The capital appreciation sought by the Fund generally arises from decreases in interest rates or improving credit fundamentals for a particular sector or security.
The Fund will generally allocate its assets among several investment sectors, without limitation, which may include: (i) high yield securities (“junk bonds”) and investment grade corporate bonds of issuers located in the United States and non-U.S. countries, including emerging market countries; (ii) fixed income securities issued by U.S. and non-U.S. governments (including emerging market governments), their agencies and instrumentalities; (iii) mortgage-related and other asset backed securities; and (iv) foreign currencies, including those of

10  PIMCO Funds | Prospectus

Prospectus

emerging market countries. However, the Fund is not required to gain exposure to any one investment sector, and the Fund’s exposure to any one investment sector will vary over time.
The average portfolio duration of this Fund normally varies from zero to eight years based on Pacific Investment Management Company LLC’s (“PIMCO”) market forecasts. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates.
The Fund may avoid investment in the securities of issuers whose business practices with respect to the environment, social responsibility, and governance (“ESG practices”) are not to PIMCO’s satisfaction. In determining the efficacy of an issuer’s ESG practices, PIMCO will use its own proprietary assessments of material ESG issues and may also reference standards as set forth by recognized global organizations such as entities sponsored by the United Nations, among others.
Additionally, PIMCO may engage proactively with issuers to encourage them to improve their ESG practices. PIMCO’s activities in this respect may include, but are not limited to, direct dialogue with company management, such as through in-person meetings, phone calls, electronic communications, and letters. Through these engagement activities, PIMCO seeks to identify opportunities for a company to improve its ESG practices, and will endeavor to work collaboratively with company management to establish concrete objectives and to develop a plan for meeting these objectives. The Fund has flexibility to invest in securities of issuers whose ESG practices are currently suboptimal, with the expectation that these practices may improve over time either as a result of PIMCO’s engagement efforts or through the company’s own initiatives. The Fund may also exclude those issuers that are not receptive to PIMCO’s engagement efforts, as determined in PIMCO’s sole discretion.
The Fund will not invest in the securities of any non-governmental issuer determined by PIMCO to be engaged principally in the (1) manufacture of alcoholic beverages, tobacco products or military equipment, (2) operation of gambling casinos, (3) production or trade of pornographic materials, (4) oil industry, including extraction, production, and refining or (5) production or distribution of coal and coal-fired generation. Notwithstanding the restrictions set forth above, the Fund can invest in the securities of any issuer determined by PIMCO to be engaged principally in biofuel production, natural gas generation and sales and trading activities. To the extent possible on the basis of information available to PIMCO, an issuer will be deemed to be principally engaged in an activity if it derives more than 10% of its gross revenues from such activities (or such more restrictive threshold or exclusionary screen (i.e. a lower gross revenue threshold), as may be determined by PIMCO from time to time). The Fund may also invest in labeled green, sustainability, social and sustainability-linked bonds from issuers involved in fossil fuel-related sectors. Labeled bonds are those issues with proceeds specifically earmarked to be used for climate (often referred to as “green bonds”), environmental sustainability and/or social projects and, in the case of sustainability-linked bonds, bonds that include sustainability-linked covenants, as explained by the issuer through use
of a framework and/or legal documentation. Labeled bonds are often verified by a third party, which certifies that the bond will or has been used to fund projects that include eligible benefits or, in the case of a sustainability-linked bond, that the bond includes sustainability-linked covenants.
In analyzing whether an issuer meets any of the criteria described above, PIMCO may rely upon, among other things, information provided by an independent third party.
The Fund may invest up to 50% of its total assets in high yield securities rated below investment grade by Moody’s Investors Service, Inc. (“Moody’s”), Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or if unrated, as determined by PIMCO (except such 50% limitation shall not apply to the Fund’s investments in mortgage- and asset-backed securities). In the event that ratings services assign different ratings to the same security, PIMCO will use the highest rating as the credit rating for that security. In addition, the Fund may invest, without limitation, in securities denominated in foreign currencies. The Fund may invest up to 20% of its total assets in securities and instruments that are economically tied to emerging market countries (this limitation does not apply to investment grade sovereign debt denominated in the local currency with less than 1 year remaining to maturity, which means the Fund may invest in such instruments without limitation subject to any applicable legal or regulatory limitation). The Fund will normally limit its foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) to 10% of its total assets.
The Fund may invest, without limitation, in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities (issuers of which will not be treated as subject to the non-governmental issuer screens described herein), subject to applicable law and any other restrictions described in the Fund’s prospectus or Statement of Additional Information. The Fund may invest in derivatives, such as credit default swaps, on indexes of securities which may include exposure to issuers that the Fund is not permitted to invest in directly. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). The Fund may also invest in contingent convertible securities and up to 10% of its total assets in preferred securities.
Principal Risks
It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.
Interest Rate Risk:the risk that fixed income securities will fluctuate in value because of a change in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  11

PIMCO ESG Income Fund

Call Risk:the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer’s credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment or may not realize the full anticipated earnings from the investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features
Credit Risk:the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, or the issuer or guarantor of collateral,  is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
Contingent Convertible Securities Risk:the risks of investing in contingent convertible securities, including the risk that interest payments will be cancelled by the issuer or a regulatory authority, the risk of ranking junior to other creditors in the event of a liquidation or other bankruptcy- related event as a result of holding subordinated debt, the risk of the Fund’s investment becoming further subordinated as a result of conversion from debt to equity, the risk that principal amount due can be written down to a lesser amount (including potentially zero), and the general risks applicable to fixed income investments, including interest rate risk, credit risk, market risk and liquidity risk, any of which could result in losses to the Fund
High Yield Risk:the risk that high yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are subject to greater levels of credit, call and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments, and may be more volatile than higher-rated securities of similar maturity
Market Risk:the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk:the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk:the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Derivatives Risk:the risk of investing in derivative instruments (such as forwards, futures, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investments may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Over-the-counter (“OTC”) derivatives or other similar investments are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives or other similar investments. The primary credit risk on derivatives that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered fund’s use of derivatives and related instruments could potentially limit or impact the Fund’s ability to invest in derivatives, limit the Fund’s ability to employ certain strategies that use derivatives or other similar investments and/or adversely affect the value of derivatives or other similar investments and the Fund’s performance
Equity Risk:the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities
Mortgage-Related and Other Asset-Backed Securities Risk:the risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk. The Fund may invest in any tranche of mortgage-related or other asset-backed securities, including junior and/or equity tranches (to the extent consistent with other of the Fund’s guidelines), which generally carry higher levels of the foregoing risks
Foreign (Non-U.S.) Investment Risk:the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes, diplomatic developments or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers

12  Prospectus | PIMCO Funds

Prospectus

Emerging Markets Risk:the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Sovereign Debt Risk:the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer’s inability or unwillingness to make principal or interest payments in a timely fashion
Currency Risk:the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies
Leveraging Risk:the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss
Management Risk:the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk:the risk of entering into short sales or other short positions, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale or other short position will not fulfill its contractual obligations, causing a loss to the Fund
Distribution Rate Risk:the risk that the Fund’s distribution rate may change unexpectedly as a result of numerous factors, including changes in realized and projected market returns, fluctuations in market interest rates, Fund performance and other factors
Environmental, Social and Governance Risk:the risk that, because the Fund’s ESG strategy may select or exclude securities of certain issuers for reasons in addition to performance, the Fund’s performance will differ from funds that do not utilize an ESG investing strategy. ESG investing is qualitative and subjective by nature, and there is no guarantee that the factors utilized by PIMCO or any judgment exercised by PIMCO will reflect the opinions of any particular investor
LIBOR Transition Risk:the risk related to the anticipated discontinuation and replacement of the London Interbank Offered Rate (“LIBOR”). Certain instruments held by the Fund rely or relied in some fashion upon LIBOR. Although the transition process away from LIBOR for most instruments has been completed, some LIBOR use is continuing and there are potential effects related to the transition away from LIBOR
or the continued use of LIBOR on the Fund, or on certain instruments in which the Fund invests, which can be difficult to ascertain and could result in losses to the Fund
Please see “Description of Principal Risks” in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund’s average annual returns compare with the returns of a broad-based securities market index and an index of similar funds. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund’s Institutional Class shares. Performance for Class A and Class C shares in the Average Annual Total Returns table reflects the impact of sales charges.The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
The Bloomberg U.S. Aggregate Index represents securities that are SEC-registered, taxable, and dollar denominated. The index covers the U.S. investment grade fixed rate bond market, with index components for government and corporate securities, mortgage pass-through securities, and asset-backed securities. These major sectors are subdivided into more specific indices that are calculated and reported on a regular basis. The Lipper Multi-Sector Income Funds Average is a total return performance average of funds tracked by Lipper, Inc. that seek current income by allocating assets among several different fixed income securities sectors (with no more than 65% in any one sector except for defensive purposes), including U.S. government and foreign governments, with a significant portion of assets in securities rated below investment grade.
Performance for the Fund is updated daily and quarterly and may be obtained as follows: daily and quarterly updates on the net asset value and performance page at https://www.pimco.com/en-us/product-finder.

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  13

PIMCO ESG Income Fund


Calendar Year Total Returns — Institutional Class
Best Quarter
December 31, 2022
2.54%
Worst Quarter
June 30, 2022
-4.64%
Year-to-Date
June 30, 2023
1.60%
Average Annual Total Returns (for periods ended 12/31/22)
 
1 Year
Since
Inception
Inception
Date
Institutional Class Return Before Taxes
-6.48%
-0.10%
9/30/2020
Institutional Class Return After Taxes on
Distributions(1)
-8.45%
-1.58%
 
Institutional Class Return After Taxes on
Distributions and Sales of Fund Shares(1)
-3.81%
-0.66%
 
I-2 Return Before Taxes
-6.56%
-0.19%
9/30/2020
I-3 Return Before Taxes
-6.61%
-0.25%
9/30/2020
Class A Return Before Taxes
-10.31%
-2.17%
9/30/2020
Class C Return Before Taxes
-8.42%
-1.24%
9/30/2020
Bloomberg U.S. Aggregate Index (reflects no
deductions for fees, expenses or taxes)
-13.01%
-6.37%
 
Lipper Multi-Sector Income Funds
Average (reflects no deductions for taxes)
-10.50%
-2.36%
 
1
After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.
Investment Adviser/Portfolio Managers
PIMCO serves as the investment adviser for the Fund. The Fund’s portfolio is jointly and primarily managed by Daniel J. Ivascyn, Alfred Murata, Joshua Anderson, Jelle Brons and Jing Yang. Mr. Ivascyn is Group Chief Investment Officer and Managing Director of PIMCO. Messrs. Murata and Anderson are Managing Directors of PIMCO. Mr. Brons and Ms. Yang are Executive Vice Presidents of PIMCO. Messrs Ivascyn, Murata, Anderson and Brons and Ms. Yang have managed the Fund since its inception in September 2020.
Other Important Information Regarding Fund Shares
For important information about purchase and sale of Fund shares, tax information, and payments to broker-dealers and other financial intermediaries, please turn to the “Summary of Other Important Information Regarding Fund Shares” section on page 46 of this prospectus.

14  Prospectus | PIMCO Funds

PIMCO High Yield Fund

Investment Objective
The Fund seeks maximum total return, consistent with preservation of capital and prudent investment management.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Class R
Maximum Sales
Charge (Load)
Imposed on
Purchases (as a
percentage of
offering price)
None
None
None
None
3.75%
None
None
Maximum Deferred
Sales Charge (Load)
(as a percentage of
the lower of the
original purchase
price or redemption
price)
None
None
None
None
1.00%
1.00%
None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Class R
Management Fees
0.55%
0.65%
0.75%
0.55%
0.65%
0.65%
0.65%
Distribution and/or
Service (12b-1) Fees
N/A
N/A
N/A
0.25%
0.25%
1.00%
0.50%
Other Expenses(1)
0.02%
0.02%
0.02%
0.02%
0.02%
0.02%
0.02%
Total Annual
Fund Operating
Expenses
0.57%
0.67%
0.77%
0.82%
0.92%
1.67%
1.17%
Fee Waiver and/or
Expense
Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
N/A
N/A
Total Annual
Fund Operating
Expenses After
Fee Waiver
and/or Expense
Reimbursement
0.57%
0.67%
0.72%
0.82%
0.92%
1.67%
1.17%
1
“Other Expenses” include interest expense of 0.02%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.55%, 0.65%, 0.70%, 0.80%, 0.90%, 1.65% and 1.15% for Institutional Class, I-2, I-3, Administrative Class, Class A, Class C and Class R shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Administrative Class, Class A, Class C or Class R shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$58
$183
$318
$714
I-2
$68
$214
$373
$835
I-3
$74
$241
$423
$949
Administrative Class
$84
$262
$455
$1,014
Class A
$465
$657
$865
$1,464
Class C
$270
$526
$907
$1,976
Class R
$119
$372
$644
$1,420
If you do not redeem your shares:
 
1 Year
3 Years
5 Years
10 Years
Class A
$465
$657
$865
$1,464
Class C
$170
$526
$907
$1,976
Portfolio Turnover
The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 25% of the average value of its portfolio.
Principal Investment Strategies
The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets in high yield investments (“junk bonds”), which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. High yield investments include securities (i) rated below investment grade by each of Moody’s Investors Services, Inc. (“Moody’s”), Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”) that provides a rating on such investment or, if unrated, determined by PIMCO to be of comparable quality, or (ii) comprising the ICE BofAML U.S. High Yield, BB-B Rated, Constrained Index. The Fund may invest up to 20% of its total assets in securities rated Caa or below by Moody’s, or equivalently

PIMCO Funds | Prospectus  15

PIMCO High Yield Fund

rated by S&P or Fitch, or, if unrated, determined by PIMCO to be of comparable quality. In the event that ratings services assign different ratings to the same security, PIMCO will use the highest rating as the credit rating for that security. The remainder of the Fund’s assets may be invested in investment grade Fixed Income Instruments. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The average portfolio duration of this Fund normally varies within one year (plus or minus) of the portfolio duration of the securities comprising the ICE BofAML U.S. High Yield, BB-B Rated, Constrained Index, as calculated by PIMCO, which as of May 31, 2023 was 3.53 years. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates. The Fund may invest up to 20% of its total assets in securities denominated in foreign currencies and may invest without limit in U.S. dollar-denominated securities of foreign issuers. The Fund will normally limit its foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) to 20% of its total assets. The Fund may invest up to 15% of its total assets in securities and instruments that are economically tied to emerging market countries (this limitation does not apply to investment grade sovereign debt denominated in the local currency with less than 1 year remaining to maturity, which means the Fund may invest, together with any other investments denominated in foreign currencies, up to 20% of its total assets in such instruments).
The Fund may invest, without limitation, in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities, subject to applicable law and any other restrictions described in the Fund’s prospectus or Statement of Additional Information. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). The “total return” sought by the Fund consists of income earned on the Fund’s investments, plus capital appreciation, if any, which generally arises from decreases in interest rates, foreign currency appreciation, or improving credit fundamentals for a particular sector or security. The Fund may also invest up to 10% of its total assets in preferred securities.
Principal Risks
It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.
Interest Rate Risk:the risk that fixed income securities will fluctuate in value because of a change in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration
Call Risk:the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call
outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer’s credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment or may not realize the full anticipated earnings from the investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features
Credit Risk:the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, or the issuer or guarantor of collateral,  is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
High Yield Risk:the risk that high yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are subject to greater levels of credit, call and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments, and may be more volatile than higher-rated securities of similar maturity
Market Risk:the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk:the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk:the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Derivatives Risk:the risk of investing in derivative instruments (such as forwards, futures, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investments may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Over-the-counter (“OTC”) derivatives or other

16  Prospectus | PIMCO Funds

Prospectus

similar investments are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives or other similar investments. The primary credit risk on derivatives that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered fund’s use of derivatives and related instruments could potentially limit or impact the Fund’s ability to invest in derivatives, limit the Fund’s ability to employ certain strategies that use derivatives or other similar investments and/or adversely affect the value of derivatives or other similar investments and the Fund’s performance
Equity Risk:the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities
Mortgage-Related and Other Asset-Backed Securities Risk:the risks of investing in mortgage-related and other asset-backed securities, including interest rate risk, extension risk, prepayment risk and credit risk. The Fund may invest in any tranche of mortgage-related or other asset-backed securities, including junior and/or equity tranches (to the extent consistent with other of the Fund’s guidelines), which generally carry higher levels of the foregoing risks
Foreign (Non-U.S.) Investment Risk:the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes, diplomatic developments or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers
Emerging Markets Risk:the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Sovereign Debt Risk:the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer’s inability or unwillingness to make principal or interest payments in a timely fashion
Currency Risk:the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies
Leveraging Risk:the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss
Management Risk:the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk:the risk of entering into short sales or other short positions, including the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale or other short position will not fulfill its contractual obligations, causing a loss to the Fund
LIBOR Transition Risk:the risk related to the anticipated discontinuation and replacement of the London Interbank Offered Rate (“LIBOR”). Certain instruments held by the Fund rely or relied in some fashion upon LIBOR. Although the transition process away from LIBOR for most instruments has been completed, some LIBOR use is continuing and there are potential effects related to the transition away from LIBOR or the continued use of LIBOR on the Fund, or on certain instruments in which the Fund invests, which can be difficult to ascertain and could result in losses to the Fund
Please see “Description of Principal Risks” in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund’s average annual returns compare with the returns of a broad-based securities market index and an index of similar funds. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund’s Institutional Class shares. For periods prior to the inception date of I-3 shares (April 27, 2018), performance information shown in the table for that class is based on the performance of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses paid by that class of shares. Performance for Class A and Class C shares in

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  17

PIMCO High Yield Fund

the Average Annual Total Returns table reflects the impact of sales charges.The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
The ICE BofAML U.S. High Yield, BB-B Rated, Constrained Index tracks the performance of BB-B Rated U.S. Dollar-denominated corporate bonds publicly issued in the U.S. domestic market. Qualifying bonds are capitalization-weighted provided the total allocation to an individual issuer (defined by Bloomberg tickers) does not exceed 2%. Issuers that exceed the limit are reduced to 2% and the face value of each of their bonds is adjusted on a pro-rata basis. Similarly, the face value of bonds of all other issuers that fall below the 2% cap are increased on a pro-rata basis. The Lipper High Yield Funds Average is a total return performance average of funds tracked by Lipper, Inc. that aim at high (relative) current yield from fixed income securities, have no quality or maturity restrictions, and tend to invest in lower grade debt issues.
Performance for the Fund is updated daily and quarterly and may be obtained as follows: daily and quarterly updates on the net asset value and performance page at https://www.pimco.com/en-us/product-finder.

Calendar Year Total Returns — Institutional Class
Best Quarter
June 30, 2020
7.99%
Worst Quarter
March 31, 2020
-11.04%
Year-to-Date
June 30, 2023
5.07%
Average Annual Total Returns (for periods ended 12/31/22)
 
1 Year
5 Years
10 Years
Institutional Class Return Before Taxes
-10.78%
1.85%
3.55%
Institutional Class Return After Taxes on Distributions(1)
-13.09%
-0.30%
1.09%
Institutional Class Return After Taxes on Distributions
and Sales of Fund Shares(1)
-6.15%
0.56%
1.68%
I-2 Return Before Taxes
-10.87%
1.74%
3.44%
I-3 Return Before Taxes
-10.91%
1.69%
3.39%
Administrative Class Return Before Taxes
-11.01%
1.59%
3.29%
Class A Return Before Taxes
-14.43%
0.72%
2.79%
Class C Return Before Taxes
-12.59%
0.73%
2.42%
Class R Return Before Taxes
-11.32%
1.24%
2.93%
ICE BofAML U.S. High Yield, BB-B Rated, Constrained
Index (reflects no deductions for fees, expenses or
taxes)
-10.58%
2.31%
3.94%
Lipper High Yield Funds Average (reflects no
deductions for taxes)
-10.66%
1.73%
3.23%
1
After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.
Investment Adviser/Portfolio Managers
PIMCO serves as the investment adviser for the Fund. The Fund’s portfolio is jointly and primarily managed by David Forgash, Sonali Pier and Jason Duko. Mr. Forgash and Ms. Pier are Managing Directors of PIMCO and Mr. Duko is an Executive Vice President of PIMCO. Ms. Pier has managed the Fund since July 2019, Mr. Forgash has managed the Fund Since January 2023 and Mr. Duko has managed the Fund since May 2023.
Other Important Information Regarding Fund Shares
For important information about purchase and sale of Fund shares, tax information, and payments to broker-dealers and other financial intermediaries, please turn to the “Summary of Other Important Information Regarding Fund Shares” section on page 46 of this prospectus.

18  Prospectus | PIMCO Funds

PIMCO High Yield Spectrum Fund

Investment Objective
The Fund seeks maximum total return, consistent with prudent investment management.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Maximum Sales Charge (Load) Imposed on
Purchases (as a percentage of offering price)
None
None
None
3.75%
None
Maximum Deferred Sales Charge (Load) (as a
percentage of the lower of the original purchase
price or redemption price)
None
None
None
1.00%
1.00%
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Class A
Class C
Management Fees
0.60%
0.70%
0.80%
0.70%
0.70%
Distribution and/or Service (12b-1) Fees
N/A
N/A
N/A
0.25%
1.00%
Other Expenses(1)
0.02%
0.02%
0.02%
0.02%
0.02%
Total Annual Fund Operating Expenses
0.62%
0.72%
0.82%
0.97%
1.72%
Fee Waiver and/or Expense Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
Total Annual Fund Operating Expenses
After Fee Waiver and/or Expense
Reimbursement
0.62%
0.72%
0.77%
0.97%
1.72%
1
“Other Expenses” include interest expense of 0.02%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.60%, 0.70%, 0.75%, 0.95% and 1.70% for Institutional Class, I-2, I-3, Class A and Class C shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Class A or Class C shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$63
$199
$346
$774
I-2
$74
$230
$401
$894
I-3
$79
$257
$450
$1,009
Class A
$470
$672
$891
$1,520
Class C
$275
$542
$933
$2,030
If you do not redeem your shares:
 
1 Year
3 Years
5 Years
10 Years
Class A
$470
$672
$891
$1,520
Class C
$175
$542
$933
$2,030
Portfolio Turnover
The Fund pays transaction costs 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 the Annual Fund Operating Expenses or in the Example tables, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 51% of the average value of its portfolio.
Principal Investment Strategies
The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets in high yield investments (“junk bonds”), which may be represented by convertibles, warrants, forwards or derivatives such as swap agreements. High yield investments include securities (i) rated below investment grade by each of Moody’s Investors Services, Inc. (“Moody’s”), Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”) that provides a rating on such investment or, if unrated, determined by PIMCO to be of comparable quality, or (ii) comprising the ICE BofAML Developed Markets High Yield Constrained (USD Hedged) Index (the “Benchmark”). The Fund may invest, without limitation, in Fixed Income Instruments and other securities of any rating below investment grade as rated by Moody’s, or equivalently rated by S&P or Fitch, or, if unrated, determined by PIMCO to be of comparable quality. In the event that ratings services assign different ratings to the same security, PIMCO will use the highest rating as the credit rating for that security. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The average portfolio duration of the Fund normally varies within one year (plus or minus) of the portfolio duration of the securities comprising the Benchmark, as calculated by PIMCO, which as of

PIMCO Funds | Prospectus  19

PIMCO High Yield Spectrum Fund

May 31, 2023 was 3.31 years. Duration is a measure used to determine the sensitivity of a security’s price to changes in interest rates. The longer a security’s duration, the more sensitive it will be to changes in interest rates.
The Fund may invest without limit in securities of foreign issuers or securities denominated in foreign currencies. The Fund may invest, without limit, in securities and instruments of corporate issuers economically tied to emerging market countries and may invest up to 10% of its total assets in sovereign debt issued by governments, their agencies or instrumentalities, or other government-related entities, that are economically tied to emerging market countries. The Fund will normally limit its foreign currency exposure (from non-U.S. dollar-denominated securities or currencies) to within 10% (plus or minus) of the Benchmark’s foreign currency exposure, which as of May 31, 2022 was 0.02%.
The Fund may invest, without limitation, in derivative instruments, such as credit default swap agreements and total return swap agreements. The Fund may purchase or sell securities on a when issued, delayed delivery or forward commitment basis and may engage in short sales. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). The “total return” sought by the Fund consists of income earned on the Fund’s investments, plus capital appreciation, if any, which generally arises from decreases in interest rates, foreign currency appreciation, or improving credit fundamentals for a particular sector or security. The Fund may also invest up to 15% of its total assets in preferred securities.
Principal Risks
It is possible to lose money on an investment in the Fund. The principal risks of investing in the Fund, which could adversely affect its net asset value, yield and total return, are listed below.
Interest Rate Risk:the risk that fixed income securities will fluctuate in value because of a change in interest rates; a fund with a longer average portfolio duration will be more sensitive to changes in interest rates than a fund with a shorter average portfolio duration
Call Risk:the risk that an issuer may exercise its right to redeem a fixed income security earlier than expected (a call). Issuers may call outstanding securities prior to their maturity for a number of reasons (e.g., declining interest rates, changes in credit spreads and improvements in the issuer’s credit quality). If an issuer calls a security that the Fund has invested in, the Fund may not recoup the full amount of its initial investment or may not realize the full anticipated earnings from the investment and may be forced to reinvest in lower-yielding securities, securities with greater credit risks or securities with other, less favorable features
Credit Risk:the risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to a derivative contract, or the issuer or guarantor of collateral,  is unable or unwilling,
or is perceived (whether by market participants, rating agencies, pricing services or otherwise) as unable or unwilling, to meet its financial obligations
High Yield Risk:the risk that high yield securities and unrated securities of similar credit quality (commonly known as “junk bonds”) are subject to greater levels of credit, call and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer’s continuing ability to make principal and interest payments, and may be more volatile than higher-rated securities of similar maturity
Market Risk:the risk that the value of securities owned by the Fund may go up or down, sometimes rapidly or unpredictably, due to factors affecting securities markets generally or particular industries
Issuer Risk:the risk that the value of a security may decline for a reason directly related to the issuer, such as management performance, changes in financial condition or credit rating, financial leverage, reputation or reduced demand for the issuer’s goods or services
Liquidity Risk:the risk that a particular investment may be difficult to purchase or sell and that the Fund may be unable to sell illiquid investments at an advantageous time or price or achieve its desired level of exposure to a certain sector. Liquidity risk may result from the lack of an active market, reduced number and capacity of traditional market participants to make a market in fixed income securities, and may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income funds may be higher than normal, causing increased supply in the market due to selling activity
Derivatives Risk:the risk of investing in derivative instruments (such as forwards, futures, swaps and structured securities) and other similar investments, including leverage, liquidity, interest rate, market, counterparty (including credit), operational, legal and management risks, and valuation complexity. Changes in the value of a derivative or other similar investments may not correlate perfectly with, and may be more sensitive to market events than, the underlying asset, rate or index, and the Fund could lose more than the initial amount invested. Changes in the value of a derivative or other similar instrument may also create margin delivery or settlement payment obligations for the Fund. The Fund’s use of derivatives or other similar investments may result in losses to the Fund, a reduction in the Fund’s returns and/or increased volatility. Over-the-counter (“OTC”) derivatives or other similar investments are also subject to the risk that a counterparty to the transaction will not fulfill its contractual obligations to the other party, as many of the protections afforded to centrally-cleared derivative transactions might not be available for OTC derivatives or other similar investments. The primary credit risk on derivatives that are exchange-traded or traded through a central clearing counterparty resides with the Fund's clearing broker or the clearinghouse. Changes in regulation relating to a registered fund’s use of derivatives and related instruments could potentially limit or impact the Fund’s ability to invest in derivatives, limit the Fund’s ability to employ certain strategies that use derivatives or other similar investments and/or adversely affect the

20  Prospectus | PIMCO Funds

Prospectus

value of derivatives or other similar investments and the Fund’s performance
Equity Risk:the risk that the value of equity securities, such as common stocks and preferred securities, may decline due to general market conditions which are not specifically related to a particular company or to factors affecting a particular industry or industries. Equity securities generally have greater price volatility than fixed income securities
Foreign (Non-U.S.) Investment Risk:the risk that investing in foreign (non-U.S.) securities may result in the Fund experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies, due to smaller markets, differing reporting, accounting and auditing standards, increased risk of delayed settlement of portfolio transactions or loss of certificates of portfolio securities, and the risk of unfavorable foreign government actions, including nationalization, expropriation or confiscatory taxation, currency blockage, or political changes, diplomatic developments or the imposition of sanctions and other similar measures. Foreign securities may also be less liquid and more difficult to value than securities of U.S. issuers
Emerging Markets Risk:the risk of investing in emerging market securities, primarily increased foreign (non-U.S.) investment risk
Sovereign Debt Risk:the risk that investments in fixed income instruments issued by sovereign entities may decline in value as a result of default or other adverse credit event resulting from an issuer’s inability or unwillingness to make principal or interest payments in a timely fashion
Currency Risk:the risk that foreign (non-U.S.) currencies will change in value relative to the U.S. dollar and affect the Fund’s investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies
Leveraging Risk:the risk that certain transactions of the Fund, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions, or derivative instruments, may give rise to leverage, magnifying gains and losses and causing the Fund to be more volatile than if it had not been leveraged. This means that leverage entails a heightened risk of loss
Management Risk:the risk that the investment techniques and risk analyses applied by PIMCO will not produce the desired results and that actual or potential conflicts of interest, legislative, regulatory, or tax restrictions, policies or developments may affect the investment techniques available to PIMCO and the individual portfolio managers in connection with managing the Fund and may cause PIMCO to restrict or prohibit participation in certain investments. There is no guarantee that the investment objective of the Fund will be achieved
Short Exposure Risk:the risk of entering into short sales or other short positions, including the potential loss of more money than the
actual cost of the investment, and the risk that the third party to the short sale or other short position will not fulfill its contractual obligations, causing a loss to the Fund
Please see “Description of Principal Risks” in the Fund's prospectus for a more detailed description of the risks of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Performance Information
The performance information shows summary performance information for the Fund in a bar chart and an Average Annual Total Returns table. The information provides some indication of the risks of investing in the Fund by showing changes in its performance from year to year and by showing how the Fund’s average annual returns compare with the returns of a broad-based securities market index and an index of similar funds. Absent any applicable fee waivers and/or expense limitations, performance would have been lower. The bar chart shows performance of the Fund’s Institutional Class shares. For periods prior to the inception date of I-3 shares (April 27, 2018), performance information shown in the table for that class is based on the performance of the Fund’s Institutional Class shares, adjusted to reflect the fees and expenses paid by that class of shares. Performance for Class A and Class C shares in the Average Annual Total Returns table reflects the impact of sales charges.The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
The ICE BofAML Developed Markets High Yield Constrained (USD Hedged) Index is a subcomponent of the ICE BofAML Global High Yield Constrained (USD Hedged) Index that excludes all non-developed countries. The Lipper Global High Yield Funds Average is a total return performance average of Funds tracked by Lipper, Inc. that aim at high (relative) current yield from both domestic and foreign fixed income securities, have no quality or maturity restrictions, and tend to invest in lower-grade debt issues.
Performance for the Fund is updated daily and quarterly and may be obtained as follows: daily and quarterly updates on the net asset value and performance page at https://www.pimco.com/en-us/product-finder.

July 31, 2023 (as supplemented September 29, 2023) | Prospectus  21

PIMCO High Yield Spectrum Fund


Calendar Year Total Returns — Institutional Class
Best Quarter
June 30, 2020
8.87%
Worst Quarter
March 31, 2020
-12.61%
Year-to-Date
June 30, 2023
5.60%
Average Annual Total Returns (for periods ended 12/31/22)
 
1 Year
5 Years
10 Years
Institutional Class Return Before Taxes
-9.74%
2.33%
4.15%
Institutional Class Return After Taxes on Distributions(1)
-12.42%
-0.06%
1.34%
Institutional Class Return After Taxes on Distributions
and Sales of Fund Shares(1)
-5.76%
0.80%
1.95%
I-2 Return Before Taxes
-9.83%
2.23%
4.05%
I-3 Return Before Taxes
-9.88%
2.18%
4.00%
Class A Return Before Taxes
-13.43%
1.20%
3.39%
Class C Return Before Taxes
-11.57%
1.21%
3.02%
ICE BofAML Developed Markets High Yield
Constrained (USD Hedged) Index (reflects no
deductions for fees, expenses or taxes)
-10.56%
2.20%
4.19%
Lipper Global High Yield Funds Average (reflects no
deductions for taxes)
-11.06%
1.06%
2.85%
1
After-tax returns are calculated using the highest historical individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. In some cases the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are for Institutional Class shares only. After-tax returns for other classes will vary.
Investment Adviser/Portfolio Managers
PIMCO serves as the investment adviser for the Fund. The Fund’s portfolio is jointly and primarily managed by Sonali Pier and David Forgash. Ms. Pier is a Managing Director of PIMCO, and she has managed the Fund since July 2019. Mr. Forgash is a Managing Director of PIMCO, and he has managed the Fund since January 2023.
Other Important Information Regarding Fund Shares
For important information about purchase and sale of Fund shares, tax information, and payments to broker-dealers and other financial intermediaries, please turn to the “Summary of Other Important Information Regarding Fund Shares” section on page 46 of this prospectus.

22  Prospectus | PIMCO Funds

PIMCO Income Fund

Investment Objective
The Fund’s primary investment objective is to maximize current income.Long-term capital appreciation is a secondary objective.
Fees and Expenses of the Fund
This table describes the fees and expenses that you may pay if you buy, hold and sell 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Class A shares of eligible funds offered by PIMCO Equity Series and PIMCO Funds. More information about these and other discounts is available in the “Classes of Shares” section on page 66 of the Fund’s prospectus, Appendix B to the Fund’s prospectus (Financial Firm-Specific Sales Charge Waivers and Discounts) or from your financial professional.
Shareholder Fees (fees paid directly from your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Class R
Maximum Sales
Charge (Load)
Imposed on
Purchases (as a
percentage of
offering price)
None
None
None
None
3.75%
None
None
Maximum Deferred
Sales Charge (Load)
(as a percentage of
the lower of the
original purchase
price or redemption
price)
None
None
None
None
1.00%
1.00%
None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
 
Inst
Class
I-2
I-3
Admin
Class
Class A
Class C
Class R
Management Fees
0.50%
0.60%
0.70%
0.50%
0.65%
0.65%
0.65%
Distribution and/or
Service (12b-1) Fees
N/A
N/A
N/A
0.25%
0.25%
1.00%
0.50%
Other Expenses(1)
0.12%
0.12%
0.12%
0.12%
0.12%
0.12%
0.12%
Total Annual
Fund Operating
Expenses
0.62%
0.72%
0.82%
0.87%
1.02%
1.77%
1.27%
Fee Waiver and/or
Expense
Reimbursement(2)
N/A
N/A
(0.05%)
N/A
N/A
N/A
N/A
Total Annual
Fund Operating
Expenses After
Fee Waiver
and/or Expense
Reimbursement
0.62%
0.72%
0.77%
0.87%
1.02%
1.77%
1.27%
1
“Other Expenses” include interest expense of 0.12%. Interest expense is borne by the Fund separately from the management fees paid to Pacific Investment Management Company LLC (“PIMCO”). Excluding interest expense, Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement are 0.50%, 0.60%, 0.65%, 0.75%, 0.90%, 1.65% and 1.15% for Institutional Class, I-2, I-3, Administrative Class, Class A, Class C and Class R shares, respectively.
2
PIMCO has contractually agreed, through July 31, 2024, to reduce its supervisory and administrative fee for the Fund’s I-3 shares by 0.05% of the average daily net assets attributable to I-3 shares of the Fund. This Fee Waiver Agreement renews annually unless terminated by PIMCO upon at least 30 days’ prior notice to the end of the contract term.
Example.The Example is intended to help you compare the cost of investing in Institutional Class, I-2, I-3, Administrative Class, Class A, Class C or Class R shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the noted class of shares for the time periods indicated, and then hold or redeem all 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:
If you redeem your shares at the end of each period:
 
1 Year
3 Years
5 Years
10 Years
Institutional Class
$63
$199
$346
$774
I-2
$74
$230
$401
$894
I-3
$79
$257
$450
$1,009
Administrative Class
$89
$278
$482
$1,073
Class A
$475
$687
$917
$1,576
Class C
$280
$557
$959
$