RRA
MIAX

Round Rock Advisors’s Miami International Holdings MIAX Stock Holding History

Round Rock Advisors’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 		$350K Buy
8,983
+1,995
+29% +$82.2K 0.05% 241
2025
Q4 		$310K Buy
+6,988
New +$312K 0.05% 260

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

Round Rock Advisors's MIAX Position: Q1 2026 in Review

Round Rock Advisors increased its Miami International Holdings (MIAX) stake by 29% in Q1 2026, buying an estimated $82.2K and bringing the position to 8,983 shares worth $350K. The position accounts for 0.05% of the portfolio, ranked #241.

Round Rock Advisors first reported a position in MIAX in Q4 2025 and has held it in 2 quarters since. 201 funds tracked by Wall St. Rank hold MIAX as of Q1 2026.

  • Round Rock Advisors held 8,983 shares of Miami International Holdings worth $350K as of Q1 2026.
  • Round Rock Advisors bought 1,995 Miami International Holdings shares in Q1 2026, an estimated $82.2K.
  • Miami International Holdings made up 0.05% of Round Rock Advisors's portfolio in Q1 2026, its #241 holding.
  • Round Rock Advisors first reported a position in Miami International Holdings in Q4 2025 and has held it in 2 quarters since.
  • 201 funds tracked by Wall St. Rank held Miami International Holdings as of Q1 2026.

Based on Round Rock Advisors's 13F filing for Q1 2026, filed 15 May 2026.