Vanguard Portfolio Management
MIAX

Vanguard Portfolio Management’s Miami International Holdings MIAX Stock Holding History

Vanguard Portfolio 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 		$141M Buy
3,786,418
+2,411,472
+175% +$108M 0.01% 1373
2026
Q1 		$53.5M Buy
+1,374,946
New +$56.6M ﹤0.01% 1650

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
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

Vanguard Portfolio Management's MIAX Position: Q2 2026 in Review

Vanguard Portfolio Management increased its Miami International Holdings (MIAX) stake by 175% in Q2 2026, buying an estimated $108M and bringing the position to 3,786,418 shares worth $141M. The position accounts for 0.01% of the portfolio, ranked #1373.

Vanguard Portfolio Management first reported a position in MIAX in Q1 2026 and has held it in 2 quarters since. 204 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Vanguard Portfolio Management held 3,786,418 shares of Miami International Holdings worth $141M as of Q2 2026.
  • Vanguard Portfolio Management bought 2,411,472 Miami International Holdings shares in Q2 2026, an estimated $108M.
  • Miami International Holdings made up 0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #1373 holding.
  • Vanguard Portfolio Management first reported a position in Miami International Holdings in Q1 2026 and has held it in 2 quarters since.
  • 204 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.