SEI Investments
MIAX

SEI Investments’s Miami International Holdings MIAX Stock Holding History

SEI Investments’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
Q1 		$20.5M Buy
526,363
+186,108
+55% +$7.67M 0.02% 788
2025
Q4 		$15.1M Buy
340,255
+239,064
+236% +$10.7M 0.01% 870
2025
Q3 		$4.07M Buy
+101,191
New +$3.7M ﹤0.01% 1386

Other funds holding MIAX

T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
HKAM
Horizon Kinetics Asset Management New York $9.23B AUM 27.52% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

SEI Investments's MIAX Position: Q1 2026 in Review

SEI Investments increased its Miami International Holdings (MIAX) stake by 55% in Q1 2026, buying an estimated $7.67M and bringing the position to 526,363 shares worth $20.5M. The position accounts for 0.02% of the portfolio, ranked #788.

SEI Investments first reported a position in MIAX in Q3 2025 and has held it in 3 quarters since. 201 funds tracked by Wall St. Rank hold MIAX as of Q1 2026.

  • SEI Investments held 526,363 shares of Miami International Holdings worth $20.5M as of Q1 2026.
  • SEI Investments bought 186,108 Miami International Holdings shares in Q1 2026, an estimated $7.67M.
  • Miami International Holdings made up 0.02% of SEI Investments's portfolio in Q1 2026, its #788 holding.
  • SEI Investments first reported a position in Miami International Holdings in Q3 2025 and has held it in 3 quarters since.
  • 201 funds tracked by Wall St. Rank held Miami International Holdings as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.