Pioneer Municipal High Income Opportunities Fund, Inc. SEC EDGAR Filings (CIK 0001864290)

SEC EDGAR filings, ownership reports, and insider transactions for Pioneer Municipal High Income Opportunities Fund, Inc..

Business address
60 State Street, 5 Th Floor, Boston, MA, 02109
State of incorporation
MD
Fiscal year end
30 April
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Pioneer Municipal High Income Opportunities Fund, Inc. has filed 173 SEC EDGAR filings since 26 May 2021

Latest Filings

Recent SEC filings for Pioneer Municipal High Income Opportunities Fund, Inc. including N-CSRS, NPORT-P, 4 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
N-CSRS Open N-CSRS document | Open XBRL data View SEC filing for N-CSRS PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC 06 Jan 2026 31 Oct 2025 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 19 Dec 2025 31 Oct 2025 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 26 Sep 2025 31 Jul 2025 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Sep 2025 27 Aug 2025
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 02 Sep 2025 005-93825
N-PX Open N-PX document View SEC filing for N-PX 27 Aug 2025 30 Jun 2025 811-23699
25-NSE Open 25-NSE document View SEC filing for 25-NSE 27 Aug 2025 001-40705
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Aug 2025 005-93825
N-CEN Open N-CEN document View SEC filing for N-CEN 14 Jul 2025 30 Apr 2025 811-23699
N-CSR Open N-CSR document | Open XBRL data View SEC filing for N-CSR PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 09 Jul 2025 30 Apr 2025 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A ADDITIONAL DEFINITIVE PROXY MATERIALS 09 Jul 2025 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 27 Jun 2025 30 Apr 2025 811-23699
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 10 Jun 2025 17 Jul 2025 811-23699
CORRESP Open CORRESP document View SEC filing for CORRESP 03 Jun 2025
PRE 14A Open PRE 14A document View SEC filing for PRE 14A CEF FUNDS 20 May 2025 17 Jul 2025 811-23699
8-K Open 8-K document View SEC filing for 8-K 8-K 20 May 2025 20 May 2025 811-23699
8-K Open 8-K document View SEC filing for 8-K 8-K 09 May 2025 07 May 2025 811-23699
8-K Open 8-K document View SEC filing for 8-K 8-K 08 May 2025 07 May 2025 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 May 2025 07 May 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 May 2025 29 Apr 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 24 Apr 2025 22 Apr 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Apr 2025 21 Apr 2025
40-17G Open 40-17G document View SEC filing for 40-17G VP IV AND VVIF II FIDELITY BOND 2025 14 Apr 2025 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Apr 2025 11 Apr 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Apr 2025 07 Apr 2025
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 04 Apr 2025 01 Apr 2025
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Apr 2025 01 Apr 2025 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 26 Mar 2025 811-23699
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Mar 2025 25 Mar 2025 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 25 Mar 2025 31 Jan 2025 811-23699
DFAN14A Open DFAN14A document View SEC filing for DFAN14A 24 Feb 2025 811-23699
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Feb 2025 005-93825
DEFC14A Open DEFC14A document View SEC filing for DEFC14A MIO 11 Feb 2025 811-23699
CORRESP Open CORRESP document View SEC filing for CORRESP 10 Feb 2025
DEFC14A Open DEFC14A document View SEC filing for DEFC14A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 10 Feb 2025 811-23699
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 04 Feb 2025 005-93825
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Feb 2025 31 Jan 2025
PRRN14A Open PRRN14A document View SEC filing for PRRN14A 31 Jan 2025 811-23699
PREC14A Open PREC14A document View SEC filing for PREC14A MIO 29 Jan 2025 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Jan 2025 27 Jan 2025
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 28 Jan 2025 005-93825
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Jan 2025 23 Jan 2025
PREC14A Open PREC14A document View SEC filing for PREC14A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 24 Jan 2025 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Jan 2025 21 Jan 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Jan 2025 16 Jan 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Jan 2025 10 Jan 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Jan 2025 08 Jan 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Jan 2025 02 Jan 2025
N-CSRS Open N-CSRS document | Open XBRL data View SEC filing for N-CSRS PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC 03 Jan 2025 31 Oct 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 Dec 2024 27 Dec 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Dec 2024 23 Dec 2024
SCHEDULE 13D/A Open SCHEDULE 13D/A document | Open XBRL data View SEC filing for SCHEDULE 13D/A 23 Dec 2024 005-93825
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Dec 2024 19 Dec 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Dec 2024 17 Dec 2024
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 19 Dec 2024 31 Oct 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Dec 2024 12 Dec 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Dec 2024 10 Dec 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Nov 2024 26 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Nov 2024 25 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 25 Nov 2024 21 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Nov 2024 19 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Nov 2024 14 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Nov 2024 12 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Nov 2024 11 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Nov 2024 04 Nov 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Nov 2024 31 Oct 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 Oct 2024 29 Oct 2024
DEFA14A Open DEFA14A document View SEC filing for DEFA14A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 22 Oct 2024 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 27 Sep 2024 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 23 Sep 2024 31 Jul 2024 811-23699
40-17G Open 40-17G document View SEC filing for 40-17G PIONEER FAMILY OF MUTUAL FUNDS 10 Sep 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Aug 2024 28 Aug 2024
N-PX Open N-PX document View SEC filing for N-PX 28 Aug 2024 30 Jun 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Aug 2024 23 Aug 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Aug 2024 22 Aug 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Aug 2024 21 Aug 2024
DEF 14A Open DEF 14A document View SEC filing for DEF 14A MHI MAV MIIO 22 Aug 2024 03 Oct 2024 811-23699
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A FORM SC 13D/A 21 Aug 2024 005-93825
DEFC14A Open DEFC14A document View SEC filing for DEFC14A MIO 19 Aug 2024 811-23699
CORRESP Open CORRESP document View SEC filing for CORRESP 15 Aug 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Aug 2024 13 Aug 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Aug 2024 12 Aug 2024
PREC14A Open PREC14A document View SEC filing for PREC14A MIO 09 Aug 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Aug 2024 07 Aug 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Aug 2024 05 Aug 2024
8-K Open 8-K document View SEC filing for 8-K 8-K 19 Jul 2024 15 Jul 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Jul 2024 11 Jul 2024
N-CEN Open N-CEN document View SEC filing for N-CEN 12 Jul 2024 30 Apr 2024 811-23699
N-CSR Open N-CSR document | Open XBRL data View SEC filing for N-CSR PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 08 Jul 2024 30 Apr 2024 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 27 Jun 2024 30 Apr 2024 811-23699
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 May 2024 28 May 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 May 2024 15 May 2024
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A FORM SC 13D/A 01 Apr 2024 005-93825
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 21 Mar 2024 31 Jan 2024 811-23699
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 21 Mar 2024 28 Feb 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Mar 2024 19 Mar 2024
CORRESP Open CORRESP document View SEC filing for CORRESP 19 Mar 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 11 Mar 2024 07 Mar 2024
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Mar 2024 06 Mar 2024
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 06 Mar 2024 28 Feb 2024
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 06 Mar 2024 05 Mar 2024
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 30 Jan 2024 22 Jan 2024
SC 13D Open SC 13D document View SEC filing for SC 13D FORM SC 13D 05 Jan 2024 005-93825
N-CSRS Open N-CSRS document | Open XBRL data View SEC filing for N-CSRS PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC 03 Jan 2024 31 Oct 2023 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 20 Dec 2023 31 Oct 2023 811-23699
N-CEN/A Open N-CEN/A document View SEC filing for N-CEN/A 25 Oct 2023 30 Apr 2022 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 26 Sep 2023 31 Jul 2023 811-23699
40-17G Open 40-17G document View SEC filing for 40-17G PIONEER FAMILY OF MUTUAL FUNDS 14 Sep 2023 811-23699
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 05 Sep 2023 01 Sep 2023
N-PX Open N-PX document View SEC filing for N-PX FORM N-PX 28 Aug 2023 30 Jun 2023 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 18 Aug 2023 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 11 Aug 2023 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 09 Aug 2023 811-23699
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEFINITIVE PROXY FILING 26 Jul 2023 12 Sep 2023 811-23699
N-CEN Open N-CEN document View SEC filing for N-CEN 13 Jul 2023 30 Apr 2023 811-23699
N-CSR Open N-CSR document | Open XBRL data View SEC filing for N-CSR PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC 07 Jul 2023 30 Apr 2023 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 22 Jun 2023 28 Apr 2023 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 22 Mar 2023 31 Jan 2023 811-23699
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A FORM SC 13G/A 14 Feb 2023 005-93825
SC 13G Open SC 13G document View SEC filing for SC 13G 13 Feb 2023 005-93825
N-CSRS Open N-CSRS document View SEC filing for N-CSRS PIONEER MUNICPAL HIGH INCOME OPPORTUNITIES FUND, INC. 04 Jan 2023 31 Oct 2022 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 21 Dec 2022 31 Oct 2022 811-23699
SC 13G Open SC 13G document View SEC filing for SC 13G FORM SC 13G 22 Nov 2022 005-93825
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 23 Sep 2022 29 Jul 2022 811-23699
40-17G Open 40-17G document View SEC filing for 40-17G PIONEER FAMILY OF MUTUAL FUNDS 15 Sep 2022 811-23699
N-PX Open N-PX document View SEC filing for N-PX N-PX 29 Aug 2022 30 Jun 2022 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFINITIVE ADDITIONAL MATERIALS 22 Aug 2022 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A PIONEER FUNDS 12 Aug 2022 811-23699
DEFA14A Open DEFA14A document View SEC filing for DEFA14A PIONEER FUNDS 12 Aug 2022 811-23699
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEFINITIVE PROXY FILING 29 Jul 2022 15 Sep 2022 811-23699
N-CEN Open N-CEN document View SEC filing for N-CEN 12 Jul 2022 30 Apr 2022 811-23699
N-CSR Open N-CSR document View SEC filing for N-CSR PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 01 Jul 2022 30 Apr 2022 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 23 Jun 2022 29 Apr 2022 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 30 Mar 2022 31 Jan 2022 811-23699
N-CSRS Open N-CSRS document View SEC filing for N-CSRS PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 03 Jan 2022 31 Oct 2021 811-23699
NPORT-P Open NPORT-P document View SEC filing for NPORT-P 23 Dec 2021 31 Oct 2021 811-23699
40-17G Open 40-17G document View SEC filing for 40-17G PIONEER FAMILY OF MUTUAL FUNDS 27 Sep 2021 811-23699
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 20 Sep 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 20 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 20 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 18 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 16 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 10 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 10 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 10 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 10 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 10 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021
424B1 Open 424B1 document View SEC filing for 424B1 PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 06 Aug 2021 333-256506
EFFECT Open EFFECT document View SEC filing for EFFECT 05 Aug 2021 333-256506
N-2/A Open N-2/A document View SEC filing for N-2/A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 04 Aug 2021 811-23699,333-256506
CORRESP Open CORRESP document View SEC filing for CORRESP 03 Aug 2021
CORRESP Open CORRESP document View SEC filing for CORRESP 03 Aug 2021
CERT Open CERT document View SEC filing for CERT NYSE CERTIFICATION 03 Aug 2021 001-40705
8-A12B Open 8-A12B document View SEC filing for 8-A12B PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 03 Aug 2021 001-40705
N-2/A Open N-2/A document View SEC filing for N-2/A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 28 Jul 2021 811-23699,333-256506
N-2/A Open N-2/A document View SEC filing for N-2/A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 26 Jul 2021 811-23699,333-256506
CORRESP Open CORRESP document View SEC filing for CORRESP 23 Jul 2021
N-2/A Open N-2/A document View SEC filing for N-2/A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 13 Jul 2021 811-23699,333-256506
CORRESP Open CORRESP document View SEC filing for CORRESP 13 Jul 2021
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 01 Jul 2021
N-2 Open N-2 document View SEC filing for N-2 PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 26 May 2021 811-23699,333-256506
N-8A Open N-8A document View SEC filing for N-8A PIONEER MUNICIPAL HIGH INCOME OPPORTUNITIES FUND, INC. 26 May 2021 811-23699

About this filer

Pioneer Municipal High Income Opportunities Fund, Inc. files with the SEC under CIK 0001864290. This page aggregates EDGAR filings and related ownership activity.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
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