PIMCO CORPORATE & INCOME OPPORTUNITY FUND

NOTICE OF CHANGE OF TRUSTEES

WHEREAS, PIMCO Corporate & Income Opportunity Fund (the “Trust”) is organized as a trust under the laws of the Commonwealth of Massachusetts;

WHEREAS, David N. Fisher retired as a Trustee of the Trust, effective as of December 1, 2024; and

WHEREAS, the Board nominated and appointed David Flattum as a Trustee of the Trust, effective as of December 1, 2024;

NOW, THEREFORE, as a result of the foregoing Trustee retirement and appointment, the seven (7) Trustees of the Trust are:

Libby D. Cantrill	650 Newport Center Drive
	Newport Beach, CA 92660
Sarah E. Cogan	1633 Broadway
	New York, New York 10019
Deborah A. DeCotis	1633 Broadway
	New York, New York 10019
David Flattum	650 Newport Center Drive
	Newport Beach, CA 92660
Alan Rappaport	1633 Broadway
	New York, New York 10019
E. Grace Vandecruze	1633 Broadway
	New York, New York 10019
Kathleen A. McCartney	1633 Broadway New York, New York 10019

IN WITNESS WHEREOF, this Notice has been subscribed this 31st day of December, 2024, by the undersigned who affirms that the statements made herein are true under the penalties of perjury.

/s/ Ryan G. Leshaw

Ryan G. Leshaw, Chief Legal Officer and Secretary

Signature Page – PIMCO Corporate & Income Opportunity Fund (PTY)