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Pioneer Municipal High Income Opportunities Fund, Inc.

MIODelisted Aug 27, 2025

Pioneer Municipal High Income Opportunities Fund, Inc. was delisted on Aug 27, 2025; its insiders filed their last Form 4 on Sep 2, 2025; 31 institutions reported holding it in 13F filings for Q2 2025, worth $108.4M in total; no superinvestor held it.

13F holders, Q4 2022

Institutional positions in Pioneer Municipal High Income Opportunities Fund, Inc. as of Dec 31, 2022. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
26
+2 vs. Q3 2022
Shares held
5.67M
+807.3K (+16.6%) vs. Q3 2022
Total value
$60.4M
+$11.1M (+22.5%) vs. Q3 2022
New holders
7
11 more added
Sold out
5
6 more reduced

1 institution that held it in Q3 2022 haven't filed for Q4 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2022: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MIO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2022: 26 institutions
Q1 2021: 0 institutionsQ2 2021: 0 institutionsQ3 2021: 7 institutionsQ4 2021: 23 institutionsQ1 2022: 24 institutionsQ2 2022: 26 institutionsQ3 2022: 25 institutionsQ4 2022: 26 institutionsQ1 2023: 25 institutionsQ2 2023: 24 institutionsQ3 2023: 29 institutionsQ4 2023: 33 institutionsQ1 2024: 31 institutionsQ2 2024: 32 institutionsQ3 2024: 29 institutionsQ4 2024: 31 institutionsQ1 2025: 34 institutionsQ2 2025: 31 institutionsQ3 2025: 1 institutionQ4 2025: 0 institutionsQ1 2026: 0 institutionsQ2 2026: 0 institutions
Value heldQ4 2022: $60.4M
Q1 2021: $0Q2 2021: $0Q3 2021: $22.8MQ4 2021: $71.4MQ1 2022: $63.4MQ2 2022: $57.4MQ3 2022: $49.5MQ4 2022: $60.4MQ1 2023: $64.8MQ2 2023: $70.0MQ3 2023: $67.8MQ4 2023: $76.5MQ1 2024: $84.3MQ2 2024: $106.4MQ3 2024: $102.7MQ4 2024: $109.1MQ1 2025: $109.3MQ2 2025: $108.4MQ3 2025: $12.1KQ4 2025: $0Q1 2026: $0Q2 2026: $0
Institutions holding MIO and their total value by quarter
QuarterHoldersValue
Q2 20260$0
Q1 20260$0
Q4 20250$0
Q3 20251$12.1K
Q2 202531$108.4M
Q1 202534$109.3M
Q4 202431$109.1M
Q3 202429$102.7M
Q2 202432$106.4M
Q1 202431$84.3M
Q4 202333$76.5M
Q3 202329$67.8M
Q2 202324$70.0M
Q1 202325$64.8M
Q4 202226$60.4M
Q3 202225$49.5M
Q2 202226$57.4M
Q1 202224$63.4M
Q4 202123$71.4M
Q3 20217$22.8M
Q2 20210$0
Q1 20210$0

Institutions, Q4 2022

Shares, value and share of portfolio for each institution holding Pioneer Municipal High Income Opportunities Fund, Inc.; share changes are against Q3 2022.

Institutions holding MIO in Q4 2022
InstitutionSharesValue% of portfolioChange in sharesAction
Morgan Stanley1,329,612$14.2M0.00%+274,448+26.0%Added
Sit Investment Associates Inc952,566$10.1M0.28%−238,953−20.1%Reduced
Saba Capital Management, L.P.934,382$9.95M0.17%+847,204+971.8%Added
Atlas Wealth LLC698,709$7.44M2.01%+698,709New
City of London Investment Management Co Ltd459,072$4.90M0.39%−62,736−12.0%Reduced
1607 Capital Partners, LLC289,447$3.08M0.21%−6,000−2.0%Reduced
Wells Fargo & Company284,207$3.03M0.00%+91,015+47.1%Added
Woodline Partners LP150,881$1.61M0.02%+150,881New
Matisse Capital110,000$1.17M1.04%+23,477+27.1%Added
Van Eck Associates Corp105,586$1.12M0.00%+9,521+9.9%Added
UBS Group AG85,172$907.1K0.00%−20,049−19.1%Reduced
Mariner Investment Group LLC83,134$885.0K2.67%−61,313−42.4%Reduced
Moors & Cabot, Inc.52,500$559.1K0.04%+52,500New
OTA Financial Group L.P.46,222$492.0K0.49%+46,222New
HighTower Advisors, LLC23,371$244.0K0.00%+23,371New
Bank of America Corp20,000$213.0K0.00%+7,901+65.3%Added
Single Point Partners, LLC10,225$109.0K0.03%00.0%Unchanged
Signaturefd, LLC9,099$96.9K0.00%+6,099+203.3%Added
Advisor Group Holdings, Inc.7,647$81.0K0.00%+2,251+41.7%Added
Steward Partners Investment Advisory, LLC5,661$60.3K0.00%+472+9.1%Added
Amundi5,000$56.5K0.00%00.0%Unchanged
JPMorgan Chase & Co4,856$52.0K0.00%+4,856New
Royal Bank of Canada2,500$27.0K0.00%−5,000−66.7%Reduced
Rockefeller Capital Management L.P.1,212$12.0K0.00%+1,212New
IFP Advisors, Inc400$9.00K0.00%+310+344.4%Added
Bessemer Group Inc421$4.00K0.00%+42+11.1%Added
Rivernorth Capital Management, LLC0$00.00%−591,566−100.0%Sold out
Karpus Management, Inc.0$00.00%−266,483−100.0%Sold out
Robinson Capital Management, LLC0$00.00%−114,369−100.0%Sold out
The PNC Financial Services Group, Inc.0$00.00%−55,000−100.0%Sold out
First Trust Advisors LP0$00.00%−11,768−100.0%Sold out
Hightower 6M Holding, LLC––––Not filed