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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
Q2 		$334K Hold
8,983
– – 0.04% 264
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

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

Round Rock Advisors's MIAX Position: Q2 2026 in Review

Round Rock Advisors held its Miami International Holdings (MIAX) position steady in Q2 2026 at 8,983 shares worth $334K. The position accounts for 0.04% of the portfolio, ranked #264.

Round Rock Advisors first reported a position in MIAX in Q4 2025 and has held it in 3 quarters since. The position peaked at $350K in Q1 2026. 206 funds tracked by Wall St. Rank hold MIAX as of Q2 2026.

  • Round Rock Advisors held 8,983 shares of Miami International Holdings worth $334K as of Q2 2026.
  • Round Rock Advisors left its Miami International Holdings share count unchanged in Q2 2026.
  • Miami International Holdings made up 0.04% of Round Rock Advisors's portfolio in Q2 2026, its #264 holding.
  • Round Rock Advisors first reported a position in Miami International Holdings in Q4 2025 and has held it in 3 quarters since.
  • Round Rock Advisors's Miami International Holdings position peaked at $350K in Q1 2026.
  • 206 funds tracked by Wall St. Rank held Miami International Holdings as of Q2 2026.

Based on Round Rock Advisors's 13F filing for Q2 2026, filed 12 Aug 2026.