Company: PTY
Filing Date: 2025-09-25
Form Type: 40-17G
Source: 0001193125-25-217116
Chunk: 57

Company: PIMCO CORPORATE & INCOME OPPORTUNITY FUND
Filing Date: 2025-09-25
Form: 40-17G
Chunk 57
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 insurance. |

All other provisions of the policy remain unchanged.

| AXIS 1011683 0121 |     | Page 1 of 1 |

| AXIS EXCESS INSURANCE |

| Endorsement Number |     | Effective Date of Endorsement |     | Policy Number      |     | Premium |
| 2                  |     | 12:01 a.m. on 07/01/2025      |     | P-001-000157461-06 |     | N/A     |

EXCLUDE SUBLIMITED COVERAGE FROM INCEPTION ENDORSEMENT It is agreed that the CONDITIONS section of the Policy, paragraph B., is deleted and replaced with the following: If any coverage under the Followed Policyis subject to a sublimit of insurance, this Policy shall not apply to such coverage and the Insurer shall not recognize amounts paid under such coverage as reducing the applicable Underlying Limit. All other provisions of the Policy remain unchanged.

| AXIS 1010309 0817 |     | Page 1 of 1 |

| AXIS EXCESS INSURANCE |

| Endorsement Number |     | Effective Date of Endorsement |     | Policy Number      |     | Premium |
| 3                  |     | 12:01 a.m. on 07/01/2025      |     | P-001-000157461-06 |     | N/A     |

FOLLOW SPECIFIC COVERAGE ENDORSEMENT It is agreed that the INSURING AGREEMENT section is deleted and replaced with the following: Except as specifically set forth herein, and subject to the Limits of Insurance shown on the Declarations, this Policy shall provide insurance excess of the Underlying Insurancein conformance with all provisions of the Followed Policy,but only with respect to the following coverages: Fidelity Coverage On Premises In Transit Securities Counterfeit Currency Forgery or Alteration Voice Initiated Funds Transfer Fraud Computer Systems Fraud Liability shall attach to the Insurer only after the full amount of the applicable Underlying Limit,and any applicable retention or deductible, has been paid, in legal currency, by the insurers of the Underlying Insurance,the Insureds, or others on behalf of the Insureds, in any combination, in accordance with the terms of the Underlying Insurance. All other provisions of the Policy remain unchanged.

| AXIS 1010315 0817 |     | Page 1 of 1 |

| U.S. SPECIALTY INSURANCE COMPANY 
 (Herein called “the