Morgan Stanley
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Morgan Stanley’s Miami International Holdings MIAX Stock Holding History

Morgan Stanley’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 		$35.3M Sell
950,593
-196,363
-17% -$8.78M ﹤0.01% 2553
2026
Q1 		$44.6M Buy
1,146,956
+926,077
+419% +$38.2M ﹤0.01% 2219
2025
Q4 		$9.8M Sell
220,879
-300,098
-58% -$13.4M ﹤0.01% 3632
2025
Q3 		$21M Buy
+520,977
New +$19.1M ﹤0.01% 2847

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

Morgan Stanley's MIAX Position: Q2 2026 in Review

Morgan Stanley reduced its Miami International Holdings (MIAX) stake by 17% in Q2 2026, selling an estimated $8.78M and leaving 950,593 shares worth $35.3M. The position accounts for ﹤0.01% of the portfolio, ranked #2553.

Morgan Stanley first reported a position in MIAX in Q3 2025 and has held it in 4 quarters since. The position peaked at $44.6M in Q1 2026. 206 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Morgan Stanley held 950,593 shares of Miami International Holdings worth $35.3M as of Q2 2026.
  • Morgan Stanley sold 196,363 Miami International Holdings shares in Q2 2026, an estimated $8.78M.
  • Miami International Holdings made up ﹤0.01% of Morgan Stanley's portfolio in Q2 2026, its #2553 holding.
  • Morgan Stanley first reported a position in Miami International Holdings in Q3 2025 and has held it in 4 quarters since.
  • Morgan Stanley's Miami International Holdings position peaked at $44.6M in Q1 2026.
  • 206 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on Morgan Stanley's 13F filing for Q2 2026, filed 13 Aug 2026.