Company: PTY
Filing Date: 2025-09-25
Form Type: 40-17G
Source: 0001193125-25-217116
Chunk: 44

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-09-25
Form: 40-17G
Chunk 44
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 not involving an Employee or forgery or alteration of financial instruments caused by (a) a single act, or series                                                                                       
 of related acts, (b) any act or acts involving one person, or a group of persons acting together, or (c) an act or event, or a series of related acts or events, not involving any identifiable person. |

will be treated as a single loss subject to the Limit of Liability set forth in Item 3. of the Declarations.

| 3. | The Policy is amended to add the following new sections: |

| • |     | · DEFINITIONS |

Employeeshall have the same definition as set forth in the Followed Policy. All other terms and conditions of the Policy remain unchanged. This endorsement, which forms a part of and is for attachment to the Policy issued by the designated Insurers, takes effect on the effective date of said Policy at the hour stated in said Policy, unless another effective date is shown below, and expires concurrently with said Policy.

| GSL43879XX (8-11)            |     | Policy No:      |     |  267860356 |
| Page 1                       |     | Endorsement No: |     |          2 |
| Continental Casualty Company |     | Effective Date: |     | 07/01/2025 |
| Insured Name: PIMCO Funds    |     |                 |     |            |

© CNA All Rights Reserved.

PO Box 2950 Hartford, CT 06104-2950 August 12, 2025 PIMCO Funds 650 Newport Center Drive NEWPORT BEACH, CA 92660 Re: Important Information about Claims Information Line Dear PIMCO Funds Travelers Bond & Specialty Insurance is pleased to announce its 1-800-842-8496Claims Information Line. This line is designed to provide insureds with an additional resource on how to report claims or those circumstances or events which may become claims. Policyholders will be able to obtain assistance on the following topics from the Claims Information Line:

| • |     | The information that needs to be included with the claim notice |

| • |     | The address, electronic mail address and/or facsimile number to which the policyholder can send claims related 
 information                                                                                                    |

| • |     | Get questions on the claim process answered |

The Declarations Page of your policy sets forth where you should report claims and claims related information. You should also review the policy’s reporting requirements to be aware