Portolan Capital Management’s Miami International Holdings MIAX Stock Holding History

Portolan Capital 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 Q1	$5.01M	Buy	+128,819	New	+$5.31M	0.27%	97

Other funds holding MIAX

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 Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

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 Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

Portolan Capital Management's MIAX Position: Q1 2026 in Review

Portolan Capital Management opened a new position in Miami International Holdings (MIAX) in Q1 2026: 128,819 shares worth $5.01M. The stake represents 0.27% of the portfolio and ranks #97 among its holdings.

201 funds tracked by Wall St. Rank hold MIAX as of Q1 2026.

Portolan Capital Management held 128,819 shares of Miami International Holdings worth $5.01M as of Q1 2026.
Miami International Holdings was a new Portolan Capital Management position in Q1 2026.
Miami International Holdings made up 0.27% of Portolan Capital Management's portfolio in Q1 2026, its #97 holding.
201 funds tracked by Wall St. Rank held Miami International Holdings as of Q1 2026.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.