MIAMI INTERNATIONAL HOLDINGS, INC. - Common Stock (MIAX)

CUSIP: 59356Q108

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class
Equity / Common Stock
Total 13F shares
25,501,338
Total 13F value
$1,026,412,421
Holder snapshot 6 signals
Share change
+25,501,338
Put/Call ratio
59%
SEC-reported price per share
$40.26
Number of holders
114
Value change
+$1,026,412,421
Number of buys
114
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
94,875,846

Security key

59356Q108

Report period

Q3 2025

Institutions

114

Top holders

10

MIAX full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 MIAMI INTERNATIONAL HOLDINGS, INC. SEC filings MIAMI INTERNATIONAL HOLDINGS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of MIAX - MIAMI INTERNATIONAL HOLDINGS, INC. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Thomas P. Gallagher
Disclosed value leader
—
Comparable rows
1/2
Latest evidence
26 Aug 2025
13D/G 3/4/5 Lead comparable stake: 4.9% 1 rows are not safely comparable across share classes. 13D/G row: Thomas P. Gallagher

Quick read

Thomas P. Gallagher leads the comparable SEC ownership view at 4.9%.

1 of 2 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Thomas P. Gallagher's linked filing trail.
Comparable ownership Top 1
Thomas P. Gallagher 4.9%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-2 of 2 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Thomas P. Gallagher
13D/G
13D/G
4.9%
—
4,036,237 shares
 $0 26 Aug 2025
Jamil Nazarali
3/4/5
Director
3/4/5
—
class O/S missing
—
2,500 shares
 — 13 Aug 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
114
Shares
25,501,338
Rows available
114
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2025 vs Q1 2026 Across Filers

Q1 2026 holders
198
Q3 2025 holders
114
Holder diff
-84
Investor Q1 2026 Shares Q3 2025 Shares Share Diff Share Chg % Q1 2026 value Q3 2025 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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