JY
MIAX

Jeff Yass’s Miami International Holdings MIAX Stock Holding History

Jeff Yass’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 		$125M Buy
3,355,043
+58,697
+2% +$2.62M 0.01% 826
2026
Q1 		$128M Buy
3,296,346
+11,394
+0.3% +$469K 0.01% 694
2025
Q4 		$146M Buy
3,284,952
+100
+0% +$4.46K 0.02% 670
2025
Q3 		$132M Buy
+3,284,852
New +$120M 0.02% 726

Other funds holding MIAX

HKAM
Horizon Kinetics Asset Management New York $8.82B AUM 23.05% 1-Year Est. Return
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
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

Jeff Yass's MIAX Position: Q2 2026 in Review

Jeff Yass increased its Miami International Holdings (MIAX) stake by 1.8% in Q2 2026, buying an estimated $2.62M and bringing the position to 3,355,043 shares worth $125M. The position accounts for 0.01% of the portfolio, ranked #826.

Jeff Yass first reported a position in MIAX in Q3 2025 and has held it in 4 quarters since. The position peaked at $146M in Q4 2025. 205 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Jeff Yass held 3,355,043 shares of Miami International Holdings worth $125M as of Q2 2026.
  • Jeff Yass bought 58,697 Miami International Holdings shares in Q2 2026, an estimated $2.62M.
  • Miami International Holdings made up 0.01% of Jeff Yass's portfolio in Q2 2026, its #826 holding.
  • Jeff Yass first reported a position in Miami International Holdings in Q3 2025 and has held it in 4 quarters since.
  • Jeff Yass's Miami International Holdings position peaked at $146M in Q4 2025.
  • 205 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.