Company: PTY
Filing Date: 2025-06-06
Form Type: 424B5
Source: 0001193125-25-137029
Chunk: 271

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-06-06
Form: 424B5
Chunk 271
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| PERFORMANCE RELATED AND COMPARATIVE INFORMATION                                        | 123 |
| SHAREHOLDER SERVICING AGENTS, CUSTODIAN, TRANSFER AGENT AND DIVIDENDDISBURSEMENT AGENT | 124 |
| INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM                                          | 124 |
| COUNSEL                                                                                | 124 |
| REGISTRATION STATEMENT                                                                 | 124 |
| FINANCIAL STATEMENTS                                                                   | 124 |
| INCORPORATION BY REFERENCE                                                             | 125 |
| AppendixA                                                                              | A-1 |

i

THE FUND The Fund commenced operations on December 27, 2002, following the initial public offering of its Common Shares. Effective February 1, 2012, the Fund changed its name from PIMCO Corporate Opportunity Fund to its current name, PIMCO Corporate & Income Opportunity Fund. The Fund was organized as a Massachusetts business trust on September 13, 2002. Prior to commencing operations on December 27, 2002, the Fund had no operations other than matters relating to its organization and registration as a diversified, closed-end management company registered under the Investment Company Act of 1940, as amended (the “1940 Act”). INVESTMENT OBJECTIVE AND POLICIES The investment objective and general investment policies of the Fund are described in the Prospectus. Additional information concerning the characteristics of certain of the Fund’s investments, strategies and risks is set forth below. Unless a strategy or policy described below is specifically prohibited by the investment restrictions listed in the Prospectus, by the investment restrictions under “Investment Restrictions” in this Statement of Additional Information, or by applicable law, the Fund may engage in each of the practices described below. However, the Fund is not required to engage in any particular transaction or purchase any particular type of securities or investment even if to do so might benefit the Fund. Unless otherwise stated herein, all investment policies of the Fund may be changed by the Board of Trustees (the “Board”) without shareholder approval. In addition, the Fund may be subject to restrictions on its ability to utilize certain investments or investment techniques. Unless otherwise stated herein, these additional restrictions may be changed with the consent of the Board but without approval by or notice to shareholders. High Yield Securities (“Junk Bonds”) and Securities of Distressed Companies The Fund may invest in debt instruments that are, at the time of purchase, rated below investment grade, or unrated but determined by PIMCO to be of comparable quality. The Fund will