Company: PTY
Filing Date: 2025-06-06
Form Type: 424B5
Source: 0001193125-25-137029
Chunk: 423

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-06-06
Form: 424B5
Chunk 423
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-profit organization(since 2015). Formerly, ManagingDirector and Head of TraditionalProduct Strategies, PIMCO(2015-2021); Global Bond Strategist,PIMCO (2008-2015); and ManagingDirector and Head of Global FixedIncome, HSBC Global AssetManagement (2005-2008). |                                                  30 | None                                                                                                                                                  |

* “Independent Trustees” are those Trustees who are not “interested persons” of the Fund (as defined in Section 2(a)(19) of the 1940 Act). ** Under the Fund’s Amended and Restated Agreement and Declaration of Trust, a Trustee serves until his or her retirement, removal, disqualification, resignation or replacement. *** The Trustee is an “interested person” of the Fund, as defined in Section 2(a)(19) of the 1940 Act, due to their affiliations with PIMCO and its affiliates.. **** Mr. Fisher’s and Ms. Cantrill’s address is 650 Newport Center Drive, Newport Beach, California 92660. (1) Ms. Cantrill was appointed as a Trustee of the Fund effective April 30, 2023.

80

Officers

| Name, Addressand Year of Birth | Position(s) Heldwith Fund | Term of Office andLength of Time Served | Principal Occupation(s)During the Past 5 Years                                                                                                                                                                                                                                                                                                                      |
| Eric D. Johnson11970           | President                 | Since 2019                              | Executive Vice President andHead of Funds Business GroupAmericas, PIMCO. President,PIMCO-Managed Funds, PIMCOFunds, PIMCO Variable InsuranceTrust, PIMCO ETF Trust, PIMCOEquity Series, PIMCO EquitySeries VIT and PIMCO FlexibleReal Estate Income Fund.                                                                                                           |
| Keisha Audain-Pressley1975     | ChiefComplianceOfficer    | Since 2018                              | Executive Vice President andDeputy Chief Compliance Officer,PIMCO. Chief ComplianceOfficer, PIMCO-Managed Funds,PIMCO Funds, PIMCO VariableInsurance Trust, PIMCO ETFTrust, PIMCO Equity Series,PIMCO Equity Series VIT,PIMCO Flexible Real EstateIncome Fund and PIMCO CapitalSolutions BDC Corp.                                                                  |
| Ryan G. Leshaw11980            | Chief LegalOfficer        | Since 2019                              | Executive Vice President andSenior Counsel, PIMCO. ChiefLegal