Company: PTY
Filing Date: 2025-06-06
Form Type: 424B5
Source: 0001193125-25-137029
Chunk: 255

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-06-06
Form: 424B5
Chunk 255
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 serves as auction agent, transfer agent, registrar, dividend paying agent and redemption agent for the Preferred Shares. Independent Registered Public Accounting Firm PwC 1100 Walnut Street, Suite 1300, Kansas City, MO 64106, serves as independent registered public accounting firm for the Fund. PwC provides audit services, tax and other audit related services to the Fund. Legal Matters Certain legal matters will be passed on for the Fund by Ropes & Gray LLP, Prudential Tower 800 Boylston Street, Boston, Massachusetts 02199. Incorporation by Reference As noted above, this prospectus is part of a registration statement filed with the SEC. The Fund is permitted to “incorporate by reference” the information filed with the SEC, which means that the Fund can disclose important information to you by referring you to those documents. In addition, all documents subsequently filed by the Fund pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), (excluding any information furnished rather than filed) prior to the termination of the offering shall be deemed to be incorporated by reference into the prospectus and the Statement of Additional Information. The information incorporated by reference is an important part of this prospectus. Any statement in a document incorporated by reference into this prospectus will be deemed to be automatically modified or superseded to the extent a statement contained in (1) this prospectus or (2) any other subsequently filed document that is incorporated by reference into this prospectus modifies or supersedes such statement. The documents incorporated by reference herein include: ◾ the Fund’s Statement of Additional Information, dated September 28, 2023, filed with this Prospectus; ◾ the Fund’s Annual Report on Form N-CSR , filed on September 1, 2023;

September 28, 2023 | Base Prospectus 99

PIMCO Corporate & Income Opportunity Fund

◾ the Fund’s Description of Common Shares on Form 8-A, filed on November 25, 2002 You may obtain copies of any information incorporated by reference into this prospectus, at no charge, by calling toll-free (844) 33-PIMCO (844-337-4626) or by writing to the Fund at c/o Pacific Investment Management Company LLC, 1633 Broadway, New York, New York 10019. The Fund’s periodic reports filed pursuant to Section 30(b)(