Company: VMO
Filing Date: 2025-05-02
Form Type: N-CSR
Source: 0001193125-25-111525
Chunk: 85

Company: Invesco Municipal Opportunity Trust
Filing Date: 2025-05-02
Form: N-CSR
Chunk 85
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 the Act and Section 302 of the Sarbanes-Oxley Act of 2002 are attached as Exhibit 99.CERT.

19(a)(4) Not applicable.

19(a)(5) Not applicable.

19(b) Certifications of Registrant’s PEO and PFO pursuant to Rule 30a-2(b)under the Act and Section 906 of the Sarbanes-Oxley Act of 2002 are attached as Exhibit 99.906CERT.

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| (Registrant) Invesco Municipal Opportunity Trust |     |                             |
| By:                                              |     | /s/ Glenn Brightman         |
| Name:                                            |     | Glenn Brightman             |
| Title:                                           |     | Principal Executive Officer |

Date: May 2, 2025 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

| By:               |     | /s/ Glenn Brightman         |
| Name:             |     | Glenn Brightman             |
| Title:            |     | Principal Executive Officer |
| Date: May 2, 2025 |     |                             |

| By:               |     | /s/ Adrien Deberghes        |
| Name:             |     | Adrien Deberghes            |
| Title:            |     | Principal Financial Officer |
| Date: May 2, 2025 |     |                             |