Miami International Holdings Ownership | Who Owns Miami International Holdings?

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Miami International Holdings Ownership Summary

Miami International Holdings is owned by 23.68% institutional investors, 11.42% insiders, and 64.89% retail investors. T. rowe price investment management is the largest institutional shareholder, holding 3.47% of MIAX shares.

MIAX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Miami International Holdings	23.68%	11.42%	64.89%
Industry	Capital Markets Stocks	28.28%	14.21%	57.51%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
T. rowe price investment management	2.43M	3.47%	$97.86M
Vanguard group	1.93M	2.75%	$85.58M
Horizon kinetics asset management	1.82M	2.60%	$80.76M
Blackrock funding, inc. /de	1.75M	2.50%	$77.82M
Alyeska investment group	1.27M	1.80%	$50.96M
Allspring global investments	932.05K	1.33%	$40.68M
Jpmorgan chase	814.34K	1.16%	$36.14M
Caldwell investment management	738.81K	1.05%	$33.73M
North reef capital management lp	725.80K	1.03%	$29.22M
Lord, abbett	659.67K	0.94%	$29.28M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Caldwell investment management	738.81K	20.74%	$33.73M
Monashee investment management	175.00K	4.38%	$7.77M
Intrinsic edge capital management	322.52K	2.55%	$14.31M
Mad river investors	75.05K	1.52%	$3.33M
North reef capital management lp	725.80K	1.37%	$29.22M
Seven grand managers	400.00K	1.35%	$17.75M
Atlas wealth partners	24.47K	1.19%	$1.09M
Horizon kinetics asset management	1.82M	1.09%	$80.76M
Maltese capital management	160.00K	0.98%	$6.44M
Penn capital management company	252.13K	0.89%	$11.22M

Top Buyers

Holder	Shares	% Assets	Change
T. rowe price investment management	2.43M	0.06%	2.43M
Alyeska investment group	1.27M	0.15%	1.27M
Blackrock funding, inc. /de	1.75M	0.00%	1.05M
North reef capital management lp	725.80K	1.37%	725.80K
Adage capital partners gp	631.65K	0.04%	631.65K

Top Sellers

Holder	Shares	% Assets	Change
Morgan stanley	220.88K	0.00%	-300.10K
Federated hermes	200.00K	0.01%	-50.00K
Intrinsic edge capital management	322.52K	2.55%	-25.87K
Massachusetts financial services co /ma/	273.91K	0.00%	-23.81K
Omers administration	-	-	-11.40K

New Positions

Holder	Shares	% Assets	Change	Value
T. rowe price investment management	2.43M	0.06%	2.43M	$97.86M
Alyeska investment group	1.27M	0.15%	1.27M	$50.96M
North reef capital management lp	725.80K	1.37%	725.80K	$29.22M
Adage capital partners gp	631.65K	0.04%	631.65K	$25.43M
Wellington management group llp	583.12K	0.00%	583.12K	$23.48M

Sold Out

Holder	Change
Washington trust advisors	-106.00
Manchester capital management	-732.00
Hrt financial lp	-5.94K
Sompo asset management	-8.20K
Squarepoint ops	-10.30K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	88	-16.98%	16,609,099	-27.80%	23	2.20%	75	-25.00%	9	-
Sep 30, 2025	33	-	6,876,749	-	9	-	33	-	-	-

MIAX Ownership FAQ

Who Owns Miami International Holdings?

Miami International Holdings shareholders are primarily institutional investors at 23.68%, followed by 11.42% insiders and 64.90% retail investors. The average institutional ownership in Miami International Holdings's industry, Capital Markets Stocks, is 28.28%, which Miami International Holdings falls below.

Who owns the most shares of Miami International Holdings?

Miami International Holdings’s largest shareholders are T. rowe price investment management (2.43M shares, 3.47%), Vanguard group (1.93M shares, 2.75%), and Horizon kinetics asset management (1.82M shares, 2.60%). Together, they hold 8.81% of Miami International Holdings’s total shares outstanding.

Does Blackrock own Miami International Holdings?

BlackRock is not among the top 10 institutional shareholders of Miami International Holdings.

Who is Miami International Holdings’s biggest shareholder by percentage of total assets invested?

Caldwell investment management is Miami International Holdings’s biggest shareholder by percentage of total assets invested, with 20.74% of its assets in 738.81K Miami International Holdings shares, valued at 33.73M$.

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