Thomas P. Gallagher owns 2.23% of Miami International Holdings
2,209,817 shares as of the September 3, 2026 filing, worth $68.4M at the latest close.
MIAX · $3.1B market cap · Founder-ledGet an email when Thomas P. Gallagher’s stake moves.
Free.
The stake
2.23%
worth $68.4M at the latest close
Stake rank
#573
by dollar value of the stake
Last sale
46 days ago
Sep 3, 2026
Last buy
432 days ago
Aug 13, 2025 · $276,000
Thomas P. Gallagher owns 2.23% of MIAMI INTERNATIONAL HOLDINGS, INC.: 2,209,817 of 99,230,898 shares, worth about $68.4M at the 2026-10-16 close. The stake has moved from 2.52% in 2025 to 2.23% on 2026-09-03, across 3 sales and 1 purchase that moved it since 2016. The last trade that moved it was a planned sale of $2M on 2026-09-03.
How the stake is held
as of the Sep 3, 2026 filing
SHARES
OF THE STAKE
COMMON STOCK · stated Sep 3, 2026 · Form 4 ↗
HELD DIRECTLY
786,542
35.6%
HELD INDIRECTLY · By Gallagher Investments, LLC
1,423,275
64.4%
THE STAKE
2,209,817
2.23%