Company: PTY
Filing Date: 2025-06-06
Form Type: 424B5
Source: 0001193125-25-137029
Chunk: 239

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-06-06
Form: 424B5
Chunk 239
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 and other characteristics of the Moody’s eligible assets included in the portfolio. In the event the Fund does not timely cure a failure to maintain (a) Moody’s Ratings Agency Preferred Shares Asset Coverage or (b) 1940 Act Preferred Shares Asset Coverage, in each case in accordance with the requirements of the rating agency or agencies then rating the ARPS, the Fund will be required to redeem ARPS as described under “—ARPS Redemption— Mandatory Redemption.” In addition to the requirements described above, the rating agency guidelines impose restrictions or limitations on the Fund’s use of certain financial instruments or investment techniques that the Fund might

otherwise utilize in order to obtain and maintain a rating from Moody’s on the ARPS. It is not currently anticipated that these guidelines will materially impede PIMCO from managing the Fund’s portfolio in accordance with the Fund’s investment objective and policies. The Fund may, but is not required to, adopt any modifications to the guidelines that may be established by Moody’s with respect to their ratings of the ARPS. Failure to adopt any such modifications, however, may result in a reduction in the rating described above or a withdrawal of rating altogether. In addition, any rating agency providing a rating for the ARPS may, at any time, change or withdraw any such rating. The Board may, without shareholder approval, amend, alter or repeal various definitions and related provisions that have been adopted by the Fund pursuant to the rating agency guidelines in the event the Fund receives written confirmation from Moody’s (or any substitute rating agency) that any such amendment, alteration or repeal would not impair the rating then assigned by the rating agency to the ARPS. The ratings of the ARPS are based on current information furnished to Moody’s by the Fund or the Investment Manager or information obtained from other sources. The ratings may be changed, suspended or withdrawn as a result of changes in, or the unavailability of, such information. The Common Shares have not been rated by a nationally recognized statistical rating organization. A rating agency’s guidelines will apply to the ARPS only so long as the rating agency is rating the shares. The Fund pays certain fees to Moody’s for rating the ARPS. The foregoing description of the rating agency guidelines and asset coverage requirements applicable to the ARPS is intended only as a summary and is qualified in its entirety by reference to the actual terms of Article 11 and other relevant provisions of the Bylaws and Exhibit 1 thereto. Liquidation Preference Subject to the rights of holders of any series or class or classes of shares ranking