Official SEC submissions

Nuveen Municipal High Income Opportunity Fund SEC Filings

Nuveen Municipal High Income Opportunity Fund (NMZ) SEC filings, periodic repor…

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Nuveen Municipal High Income Opportunity Fund's latest SEC filing is 4.

It was filed on August 6, 2026, and 40 recent filings are available.

Each row links directly to the SEC document and filing index.

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Recent SEC filings

Insider transaction

Filed: 2026-08-06

Report date: 2026-08-04

PRIMARY DOCUMENT

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Insider transaction

Filed: 2026-08-04

Report date: 2026-07-31

PRIMARY DOCUMENT

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Insider transaction

Filed: 2026-07-28

Report date: 2026-07-24

PRIMARY DOCUMENT

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DEF 14A

Proxy statement

Filed: 2026-07-02

Report date: 2026-08-13

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2026-06-29

Report date: 2026-06-22

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Insider transaction

Filed: 2026-04-29

Report date: 2026-04-27

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Insider transaction

Filed: 2026-03-06

Report date: 2026-03-05

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Insider transaction

Filed: 2025-12-22

Report date: 2025-12-19

PRIMARY DOCUMENT

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Insider transaction

Filed: 2025-12-15

Report date: 2025-12-11

PRIMARY DOCUMENT

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Insider transaction

Filed: 2025-10-14

Report date: 2025-10-10

PRIMARY DOCUMENT

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Insider transaction

Filed: 2025-10-10

Report date: 2025-10-09

PRIMARY DOCUMENT

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Insider transaction

Filed: 2025-09-19

Report date: 2025-09-17

PRIMARY DOCUMENT

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DEF 14A

Proxy statement

Filed: 2025-06-30

Report date: 2025-08-14

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2025-03-24

Report date: 2025-03-21

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Insider transaction

Filed: 2025-01-17

Report date: 2025-01-16

PRIMARY DOCUMENT

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Insider transaction

Filed: 2024-12-13

Report date: 2014-06-05

FORM 4

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SC 13D/A

Ownership report

Filed: 2024-12-13

SC 13D/A

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Insider transaction

Filed: 2024-12-06

Report date: 2024-12-03

FORM 4

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DEF 14A

Proxy statement

Filed: 2024-06-27

Report date: 2024-08-08

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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8-K

Current report

Filed: 2024-03-06

Report date: 2024-03-06

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2023-10-26

Report date: 2023-10-26

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Insider transaction

Filed: 2023-10-25

Report date: 2023-10-25

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8-K

Current report

Filed: 2023-10-13

Report date: 2023-10-13

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2023-08-10

Report date: 2023-08-10

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DEF 14A

Proxy statement

Filed: 2023-06-30

Report date: 2023-08-09

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2023-04-26

Report date: 2023-04-24

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SC 13D/A

Ownership report

Filed: 2023-04-26

SC 13D/A

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Insider transaction

Filed: 2023-04-26

Report date: 2023-04-24

FORM 4 SUBMISSION

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SC 13D/A

Ownership report

Filed: 2023-04-26

SC 13D/A

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SC 13D

Ownership report

Filed: 2023-04-12

SC 13D

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SC 13D/A

Ownership report

Filed: 2023-04-05

SC 13D/A

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Insider transaction

Filed: 2023-04-05

Report date: 2023-04-03

FORM 4 SUBMISSION

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Insider transaction

Filed: 2022-11-28

Report date: 2022-11-28

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DEF 14A

Proxy statement

Filed: 2022-06-28

Report date: 2022-08-05

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Insider transaction

Filed: 2022-06-13

Report date: 2022-06-09

FORM 4 SUBMISSION

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SC 13D/A

Ownership report

Filed: 2022-06-13

SC 13D/A

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Insider transaction

Filed: 2022-05-26

Report date: 2022-05-26

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8-K

Current report

Filed: 2022-02-25

Report date: 2022-02-24

8-K

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SC 13D/A

Ownership report

Filed: 2022-01-04

SC 13D/A

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DEF 14A

Proxy statement

Filed: 2021-06-25

Report date: 2021-08-04

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

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Verified data

Recent filing categories: 4
Recent filings: 40
SEC CIK: 0001266585
Latest filing date: August 6, 2026

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