T. Rowe Price Investment Management
MIAX

T. Rowe Price Investment Management’s Miami International Holdings MIAX Stock Holding History

T. Rowe Price Investment 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 		$187M Buy
5,032,970
+887,352
+21% +$39.7M 0.12% 190
2026
Q1 		$161M Buy
4,145,618
+1,119,906
+37% +$46.1M 0.11% 186
2025
Q4 		$134M Buy
3,025,712
+595,096
+24% +$26.5M 0.08% 212
2025
Q3 		$97.9M Buy
+2,430,616
New +$88.9M 0.06% 273

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
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

T. Rowe Price Investment Management's MIAX Position: Q2 2026 in Review

T. Rowe Price Investment Management increased its Miami International Holdings (MIAX) stake by 21% in Q2 2026, buying an estimated $39.7M and bringing the position to 5,032,970 shares worth $187M. The position accounts for 0.12% of the portfolio, ranked #190.

T. Rowe Price Investment Management first reported a position in MIAX in Q3 2025 and has held it in 4 quarters since. 206 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • T. Rowe Price Investment Management held 5,032,970 shares of Miami International Holdings worth $187M as of Q2 2026.
  • T. Rowe Price Investment Management bought 887,352 Miami International Holdings shares in Q2 2026, an estimated $39.7M.
  • Miami International Holdings made up 0.12% of T. Rowe Price Investment Management's portfolio in Q2 2026, its #190 holding.
  • T. Rowe Price Investment Management first reported a position in Miami International Holdings in Q3 2025 and has held it in 4 quarters since.
  • 206 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on T. Rowe Price Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.