American Century Companies
MIAX

American Century Companies’s Miami International Holdings MIAX Stock Holding History

American Century Companies’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 		$47.5M Sell
1,221,485
-226,808
-16% -$9.34M 0.02% 774
2025
Q4 		$64.3M Buy
1,448,293
+1,193,011
+467% +$53.2M 0.03% 619
2025
Q3 		$10.3M Buy
+255,282
New +$9.34M 0.01% 1415

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

American Century Companies's MIAX Position: Q1 2026 in Review

American Century Companies reduced its Miami International Holdings (MIAX) stake by 16% in Q1 2026, selling an estimated $9.34M and leaving 1,221,485 shares worth $47.5M. The position accounts for 0.02% of the portfolio, ranked #774.

American Century Companies first reported a position in MIAX in Q3 2025 and has held it in 3 quarters since. The position peaked at $64.3M in Q4 2025. 201 funds tracked by Wall St. Rank hold MIAX as of Q1 2026.

  • American Century Companies held 1,221,485 shares of Miami International Holdings worth $47.5M as of Q1 2026.
  • American Century Companies sold 226,808 Miami International Holdings shares in Q1 2026, an estimated $9.34M.
  • Miami International Holdings made up 0.02% of American Century Companies's portfolio in Q1 2026, its #774 holding.
  • American Century Companies first reported a position in Miami International Holdings in Q3 2025 and has held it in 3 quarters since.
  • American Century Companies's Miami International Holdings position peaked at $64.3M in Q4 2025.
  • 201 funds tracked by Wall St. Rank held Miami International Holdings as of Q1 2026.

Based on American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.