HKAM
MIAX

Horizon Kinetics Asset Management’s Miami International Holdings MIAX Stock Holding History

Horizon Kinetics Asset Management’s Portfolio MIAX Stock Details MIAX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$291M Buy
7,842,173
+4,390,624
+127% +$196M 3.3% 5
2026
Q1 		$134M Buy
3,451,549
+1,631,751
+90% +$67.2M 1.46% 9
2025
Q4 		$80.8M Buy
1,819,798
+437,395
+32% +$19.5M 1.09% 15
2025
Q3 		$55.7M Buy
+1,382,403
New +$50.6M 0.68% 22

Other funds holding MIAX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
JD6
J Digital 6 Chicago, Illinois $169M AUM 111.5% 1-Year Est. Return
William Blair & Company
William Blair & Company Chicago, Illinois $38.4B AUM 25.71% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $80.2B AUM 51.53% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Horizon Kinetics Asset Management's MIAX Position: Q2 2026 in Review

Horizon Kinetics Asset Management increased its Miami International Holdings (MIAX) stake by 127% in Q2 2026, buying an estimated $196M and bringing the position to 7,842,173 shares worth $291M. The position accounts for 3.3% of the portfolio, ranked #5.

Horizon Kinetics Asset Management first reported a position in MIAX in Q3 2025 and has held it in 4 quarters since. 207 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Horizon Kinetics Asset Management held 7,842,173 shares of Miami International Holdings worth $291M as of Q2 2026.
  • Horizon Kinetics Asset Management bought 4,390,624 Miami International Holdings shares in Q2 2026, an estimated $196M.
  • Miami International Holdings made up 3.3% of Horizon Kinetics Asset Management's portfolio in Q2 2026, its #5 holding.
  • Horizon Kinetics Asset Management first reported a position in Miami International Holdings in Q3 2025 and has held it in 4 quarters since.
  • 207 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on Horizon Kinetics Asset Management's 13F filing for Q2 2026, filed 11 Aug 2026.