Company: PTY
Filing Date: 2025-09-25
Form Type: 40-17G
Source: 0001193125-25-217116
Chunk: 30

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-09-25
Form: 40-17G
Chunk 30
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 loss occurred, even though the amount of loss does not exceed the applicable Deductible Amount, or the exact amount or details of loss may not then be known.

| (2) | Section 9., Notice to Company – Proof – Legal Proceedings Against Company, of the                 
 Conditions and Limitations, is amended by deleting paragraph a. and replacing with the following: |

| a. | The Assured shall give the Company notice at the earliest practicable moment, not to exceed ninety (90) days                                                                                                                   
 after discovery of a loss by the Risk Management’s or General Counsels’ office of the first named Assured, in an amount that is in excess of 50% of the applicable Deductible Amount, as stated in Item 2 of the Declarations. |

| (3) | Section 13., Termination, of the Conditions and Limitations, is amended by deleting the lead-in to paragraph c. and replacing with the following: |

| c. | If the Risk Management’s or General Counsels’ office of the first named Assured, not                                                                                                                                      
 acting in collusion with an Employee, discovers any dishonest or fraudulent act committed by such Employee, whether in the employment of the Assured or otherwise, and whether against the Assured or any other person or 
 entity, the Assured; The title and any headings in this endorsement/rider are solely for convenience and form no part of the terms and conditions of coverage.                                                            |

All other terms, conditions and limitations of this policy shall remain unchanged.

| Authorized Representative |

| PF-52911 (08/21) |     | Page 1 of 1 |

FRAUDULENT TRANSFER INSTRUCTION ENDORSEMENT

| Named Assured             
 PIMCO FUNDS               |     |                              |     | Endorsement                   
 Number 5                      |
| Bond Number               
 J06915000                 |     | Bond Period                  
 07-01-2025   to   07-01-2026 |     | Effective Date of Endorsement 
 July 1, 2025                  |
| Issued By                 
 Federal Insurance Company |     |                              |     |                               |

THIS ENDORSEMENT CHANGES THE BOND. PLEASE READ IT CAREFULLY. This endorsement modifies insurance provided under the following: FINANCIAL INSTITUTION BOND FOR INVESTMENT COMPANIES In consideration of the premium charged, it is agreed that solely with respect to coverage afforded