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MIAX

Miami International Holdings
MIAX

201 hedge funds and large institutions have $1.95B invested in Miami International Holdings in 2026 Q1 according to their latest regulatory filings, with 80 funds opening new positions, 83 increasing their positions, 26 reducing their positions, and 35 closing their positions.

New
Increased
Maintained
Reduced
Closed

219% more repeat investments, than reductions

Existing positions increased: 83 | Existing positions reduced: 26

129% more first-time investments, than exits

New positions opened: 80 | Existing positions closed: 35

25% more funds holding

Funds holding: 161 → 201 (+40)

22% more call options, than puts

Call options by funds: $13.4M | Put options by funds: $11M

18% more capital invested

Capital invested by funds: $1.66B → $1.95B (+$291M)

8.75% more ownership

Funds ownership: 46.03% → 54.79% (+8.8%)

0% more funds holding in top 10

Funds holding in top 10: 4 → 4 (0)

Holders
201
Holders Change
+40
Holders Change %
+24.84%
% of All Funds
2.47%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
80
Increased
83
Reduced
26
Closed
35
Calls
$13.4M
Puts
$11M
Net Calls
+$2.38M
Net Calls Change
-$541K

Top Buyers

Rank Fund Capital Flow
1
HKAM
Horizon Kinetics Asset Management
New York
+$67.2M
2
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
+$46.1M
3
Citadel Advisors
Citadel Advisors
Florida
+$40.7M
4
Morgan Stanley
Morgan Stanley
New York
+$38.2M
5
Two Sigma Investments
Two Sigma Investments
New York
+$31M

Top Sellers

Rank Fund Capital Flow
1
Jane Street
Jane Street
New York
-$26.3M
2
JF
Jump Financial
Illinois
-$11M
3
NRCM
North Reef Capital Management
California
-$10.3M
4
American Century Companies
American Century Companies
Missouri
-$9.34M
5
LGM
Lykos Global Management
Connecticut
-$7.77M
Name Holding Trade Value Shares
Change 		Change in
Stake
Voloridge Investment Management
76
Voloridge Investment Management
Florida
$3.33M +$3.53M +85,621 New
Qube Research & Technologies (QRT)
77
Qube Research & Technologies (QRT)
United Kingdom
$3.21M +$3.4M +82,474 New
MRI
78
Mad River Investors
Massachusetts
$3.16M +$255K +6,200 +8%
WC
79
Wexford Capital
Florida
$3.13M +$3.31M +80,400 New
CBA
80
Coastal Bridge Advisors
Connecticut
$3.04M +$24.8K +601 +0.8%
Bank of New York Mellon
81
Bank of New York Mellon
New York
$3.04M +$724K +17,572 +29%
SPC
82
Spirepoint Private Client
Florida
$2.68M +$2.84M +68,883 New
BAM
83
Bullseye Asset Management
Colorado
$2.57M +$1.62M +39,217 +147%
Wells Fargo
84
Wells Fargo
California
$2.38M +$1.05M +25,596 +72%
OL
85
one8zero8 LLC
North Carolina
$2.3M +$26.8K +650 +1%
QCM
86
Quantinno Capital Management
New York
$2.16M +$2.29M +55,487 New
GIPM
87
G2 Investment Partners Management
New York
$2.05M +$2.17M +52,600 New
EGM
88
Engineers Gate Manager
New York
$2.01M +$2.13M +51,736 New
Corient Private Wealth
89
Corient Private Wealth
Florida
$2M +$2.12M +51,430 New
Credit Agricole
90
Credit Agricole
France
$1.98M – – –
AB
91
Atlas Brown
Kentucky
$1.98M +$2.1M +50,974 New
CC
92
Covalis Capital
United Kingdom
$1.95M +$412K +10,000 +25%
PCA
93
Prosperity Capital Advisors
Ohio
$1.83M +$1.93M +46,948 New
Osaic Holdings
94
Osaic Holdings
Arizona
$1.75M +$194K +4,720 +12%
Squarepoint
95
Squarepoint
New York
$1.57M +$1.66M +40,222 New
SLAM
96
Swiss Life Asset Management
$1.56M +$630K +15,287 New
ET
97
Entropy Technologies
New York
$1.56M +$1.65M +40,076 New
LPL Financial
98
LPL Financial
California
$1.55M +$1.65M +39,932 New
State of Wisconsin Investment Board
99
State of Wisconsin Investment Board
Wisconsin
$1.53M -$132K -3,211 -8%
NA
100
NewEdge Advisors
Louisiana
$1.52M +$1.61M +39,025 New
2 3
4
5 6

MIAX Hedge Fund Activity: Q1 2026 in Review

201 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Miami International Holdings (MIAX) for Q1 2026, worth a combined $1.95B — up 18% from $1.66B a quarter earlier.

Buyers outnumbered sellers: 80 funds opened new MIAX positions and 35 closed out — a net gain of 45 holders — while 83 added to existing stakes and 26 trimmed.

The largest buyer was Horizon Kinetics Asset Management, adding an estimated $67.2M. The largest seller was Jane Street, exiting entirely with an estimated $26.3M sold.

  • 201 institutional investors held Miami International Holdings (MIAX) as of Q1 2026, up from 161 in Q4 2025.
  • Funds reported $1.95B of Miami International Holdings stock for Q1 2026, up 18% quarter-over-quarter.
  • 80 funds opened new Miami International Holdings positions in Q1 2026 and 35 closed out, a net change of +45 holders.
  • The largest Miami International Holdings buyer in Q1 2026 was Horizon Kinetics Asset Management, an estimated $67.2M added.
  • The largest Miami International Holdings seller in Q1 2026 was Jane Street, an estimated $26.3M sold.

Based on aggregated 13F filings for Q1 2026.