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NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NMZ) SEC Filings | Global Financial Data

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

NMZSEC EDGAR

(MA)CIK: 1266585

425

FILING UNDER SECURITIES ACT RULE 425

Filed: Mar 9, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Mar 9, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Mar 9, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Mar 9, 2026

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Filed: Mar 6, 2026 | Report: Mar 5, 2026

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425

FILING UNDER RULE 425

Filed: Feb 27, 2026

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425

FILING UNDER SECURITIES ACT RULE 425 OF CERTAIN PROSPECTUSES AND COMMUNICATIONS

Filed: Feb 26, 2026

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Filed: Feb 23, 2026 | Report: Oct 16, 2025

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 4, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 4, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 4, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 2, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 2, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Feb 2, 2026

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425

FILING UNDER RULE 425

Filed: Jan 23, 2026

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425

FILING UNDER RULE 425

Filed: Jan 23, 2026

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425

FILING UNDER RULE 425

Filed: Jan 23, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Jan 16, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Jan 16, 2026

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Jan 16, 2026

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N-CEN

Filed: Jan 14, 2026 | Report: Oct 31, 2025

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N-CSR

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Filed: Jan 7, 2026 | Report: Oct 31, 2025

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NPORT-P

Filed: Dec 30, 2025 | Report: Oct 31, 2025

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Dec 29, 2025

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Dec 29, 2025

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Dec 29, 2025

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425

FILING UNDER SECURITIES ACT RULE 425

Filed: Dec 29, 2025

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PRIMARY DOCUMENT

Filed: Dec 22, 2025 | Report: Dec 19, 2025

AMENDMENT TO FORM N-14 8C

Filed: Dec 15, 2025 | Report: Dec 11, 2025

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N-14 8C/A

INITIAL REGISTRATION ON FORM N-14

Filed: Nov 18, 2025

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Filed: Nov 5, 2025 | Report: Sep 10, 2025

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N-23C-2

NOTICE OF INTENTION TO REDEEM SECURITIES

Filed: Oct 31, 2025 | Report: Oct 31, 2025

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PRIMARY DOCUMENT

Filed: Oct 14, 2025 | Report: Oct 10, 2025

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PRIMARY DOCUMENT

Filed: Oct 10, 2025 | Report: Oct 9, 2025

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N-14 8C

INITIAL REGISTRATION STATEMENT ON FORM N-14

Filed: Sep 29, 2025

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NPORT-P

Filed: Sep 26, 2025 | Report: Jul 31, 2025

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PRIMARY DOCUMENT

Filed: Sep 19, 2025 | Report: Sep 17, 2025

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N-PX

Filed: Aug 22, 2025 | Report: Jun 30, 2025

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Filed: Jul 7, 2025 | Report: Apr 30, 2025

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DEF 14A

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Filed: Jun 30, 2025 | Report: Aug 14, 2025

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NPORT-P

Filed: Jun 26, 2025 | Report: Apr 30, 2025

NOTICE OF INTENTION TO REDEEM SECURITIES

Filed: Apr 28, 2025 | Report: Apr 28, 2025

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NPORT-P

Filed: Mar 26, 2025 | Report: Jan 31, 2025

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Filed: Mar 24, 2025 | Report: Mar 21, 2025

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