Wellington Management Group
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Wellington Management Group’s Miami International Holdings MIAX Stock Holding History

Wellington Management Group’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 		$9.74M Sell
262,170
-182,681
-41% -$8.17M ﹤0.01% 1300
2026
Q1 		$17.3M Sell
444,851
-171,267
-28% -$7.06M ﹤0.01% 1071
2025
Q4 		$27.3M Buy
616,118
+32,998
+6% +$1.47M ﹤0.01% 925
2025
Q3 		$23.5M Buy
+583,120
New +$21.3M ﹤0.01% 960

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
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

Wellington Management Group's MIAX Position: Q2 2026 in Review

Wellington Management Group reduced its Miami International Holdings (MIAX) stake by 41% in Q2 2026, selling an estimated $8.17M and leaving 262,170 shares worth $9.74M. The position accounts for ﹤0.01% of the portfolio, ranked #1300.

Wellington Management Group first reported a position in MIAX in Q3 2025 and has held it in 4 quarters since. The position peaked at $27.3M in Q4 2025. 206 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Wellington Management Group held 262,170 shares of Miami International Holdings worth $9.74M as of Q2 2026.
  • Wellington Management Group sold 182,681 Miami International Holdings shares in Q2 2026, an estimated $8.17M.
  • Miami International Holdings made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1300 holding.
  • Wellington Management Group first reported a position in Miami International Holdings in Q3 2025 and has held it in 4 quarters since.
  • Wellington Management Group's Miami International Holdings position peaked at $27.3M in Q4 2025.
  • 206 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

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