Are insiders buying MIO stock?

Yes — 4 distinct insiders have bought MIO (Pioneer Municipal High Income Opportunities Fund, Inc.) on the open market, including 3 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was May 8, 2025.

How much MIO stock have insiders bought?

Insiders have bought a combined $4.8M of MIO across 52 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in MIO?

A cluster buy is two or more distinct Pioneer Municipal High Income Opportunities Fund, Inc. insiders — officers, directors, or 10% owners — each buying MIO on the open market within a rolling window. MIO has 3 detected cluster buys to date.

Where does this MIO insider trading data come from?

Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

MIO insider buying

3 cluster buys

Pioneer Municipal High Income Opportunities Fund, Inc. · Financials

When two or more insiders at Pioneer Municipal High Income Opportunities Fund, Inc. buy MIO on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in MIO plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.

Clusters

Distinct insiders

Total bought

$4.8M

Market cap

$192.2M

Detected clusters

Dec 17 – Dec 30, 2024
Detected Dec 30, 2024
2 insiders
Total bought
$1.6M
Market cap
$192.2M
Oct 29 – Nov 21, 2024
Detected Nov 21, 2024
2 insiders
Total bought
$615.2K
Market cap
$192.2M
Aug 7 – Aug 22, 2024
Detected Aug 22, 2024
2 insiders
Total bought
$678.8K
Market cap
$192.2M

All notable open-market buys in MIO

Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.

Date	Insider	Shares	Price	Value	Filing
May 7, 2025	Weinstein Boaz 10% Owner	1,090	$11.58	$12.6K	SEC ↗
Apr 29, 2025	Weinstein Boaz 10% Owner	197	$11.51	$2.3K	SEC ↗
Apr 22, 2025	Saba Capital Management, L.P. 10% Owner	10,963	$11.29	$123.8K	SEC ↗
Apr 21, 2025	Saba Capital Management, L.P. 10% Owner	5,310	$11.24	$59.7K	SEC ↗
Apr 11, 2025	Saba Capital Management, L.P. 10% Owner	26,990	$11.18	$301.7K	SEC ↗
Apr 8, 2025	Weinstein Boaz 10% Owner	2,465	$11.38	$28.1K	SEC ↗
Apr 7, 2025	Weinstein Boaz 10% Owner	700	$11.64	$8.1K	SEC ↗
Jan 31, 2025	Saba Capital Management, L.P. 10% Owner	2,829	$12.00	$33.9K	SEC ↗
Jan 28, 2025	Saba Capital Management, L.P. 10% Owner	200	$11.95	$2.4K	SEC ↗
Jan 27, 2025	Saba Capital Management, L.P. 10% Owner	913	$11.97	$10.9K	SEC ↗
Jan 23, 2025	Saba Capital Management, L.P. 10% Owner	11,150	$11.92	$132.9K	SEC ↗
Jan 22, 2025	Saba Capital Management, L.P. 10% Owner	100	$11.92	$1.2K	SEC ↗
Jan 21, 2025	Saba Capital Management, L.P. 10% Owner	51	$11.91	$607.4	SEC ↗
Jan 16, 2025	Saba Capital Management, L.P. 10% Owner	6,637	$11.84	$78.6K	SEC ↗
Jan 10, 2025	Saba Capital Management, L.P. 10% Owner	100	$11.89	$1.2K	SEC ↗
Jan 8, 2025	Saba Capital Management, L.P. 10% Owner	2,769	$12.00	$33.2K	SEC ↗
Jan 3, 2025	Saba Capital Management, L.P. 10% Owner	1,133	$11.99	$13.6K	SEC ↗
Jan 2, 2025	Saba Capital Management, L.P. 10% Owner	5,317	$11.96	$63.6K	SEC ↗
Dec 30, 2024	Weinstein Boazcluster 10% Owner	21,469	$11.91	$255.7K	SEC ↗
Dec 26, 2024	Weinstein Boazcluster 10% Owner	32,911	$11.85	$390.0K	SEC ↗
Dec 23, 2024	Weinstein Boazcluster 10% Owner	12,165	$11.85	$144.2K	SEC ↗
Dec 20, 2024	Weinstein Boazcluster 10% Owner	14,314	$11.94	$170.9K	SEC ↗
Dec 19, 2024	Weinstein Boazcluster 10% Owner	20,825	$12.00	$249.9K	SEC ↗
Dec 18, 2024	Saba Capital Management, L.P.cluster 10% Owner	17,915	$12.03	$215.5K	SEC ↗
Dec 17, 2024	Saba Capital Management, L.P.cluster 10% Owner	11,865	$12.11	$143.7K	SEC ↗

27 earlier buys hidden — sign in free to see the full history.

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MIO insider buying — FAQ

Are insiders buying MIO stock?: Yes — 4 distinct insiders have bought MIO (Pioneer Municipal High Income Opportunities Fund, Inc.) on the open market, including 3 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was May 8, 2025.
How much MIO stock have insiders bought?: Insiders have bought a combined $4.8M of MIO across 52 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in MIO?: A cluster buy is two or more distinct Pioneer Municipal High Income Opportunities Fund, Inc. insiders — officers, directors, or 10% owners — each buying MIO on the open market within a rolling window. MIO has 3 detected cluster buys to date.
Where does this MIO insider trading data come from?: Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

How we track insider buying in MIO

We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy MIO within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?

This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding MIO.