UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported) August 20, 2024

PIMCO Corporate & Income Opportunity Fund

(Exact Name of Registrant as Specified in Its Charter)

Massachusetts

(State or Other Jurisdiction of Incorporation)


811-21238		466121513
(Commission File Number)		(IRS Employer Identification No.)

1633 Broadway, New York, NY		10019
(Address of Principal Executive Offices)		(Zip Code)

(844) 337-4626

(Registrant’s Telephone Number, Including Area Code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common shares	PTY	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events.

On August 15, 2024, the Board approved the removal of the Fund’s non-fundamental investment guideline for the Fund to invest at least 25% of the Fund’s total assets in corporate debt obligations and other corporate income-producing securities and approved the addition of a non-fundamental investment guideline for the Fund to invest at least 50% of the Fund’s total assets in corporate debt obligations and other corporate securities, effective September 20, 2024. The supplement to the Fund’s prospectus and statement of additional information disclosing this change is attached hereto as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.


(d)		Exhibits

99.1		Supplement, dated August 20, 2024

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


PIMCO Corporate & Income Opportunity Fund

By:		/s/ Ryan G. Leshaw
Name:		Ryan G. Leshaw
Title:		Chief Legal Officer and Secretary

Date: August 20, 2024

PIMCO CORPORATE & INCOME OPPORTUNITY FUND 8-K