Miami International Holdings (MIAX) Institutional Buying & Selling Tracker (Q2 2026)

MIAX ranks #2819 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.

MIAX is a top-conviction position for J Digital 6 LLC — at 39.7% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.

The largest dollar stake in MIAX belongs to Horizon Kinetics Asset Management LLC, but the position matters far more to J Digital 6 LLC, who has 39.7% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.

Horizon Kinetics Asset Management LLC has added to its MIAX position for two straight quarters, increasing it by $210.7M to reach $291.4M today.

North Reef Capital Management LP has trimmed its MIAX position for two straight quarters, cutting it by $46.8M while still holding $9.3M.

MIAX is down 2.1% today, but institutions show net buying of $957.1M this quarter — a divergence between today's price move and the underlying institutional flow.

MIAX posted net income of $142.3M over the trailing twelve months, and currently trades at a P/E of 21.3.

• Profitable — net income of $142.3M over the trailing twelve months
• Revenue grew 16.8% year over year
• Net income improved year over year, from $1.8M to $142.3M
• Generated $167.8M in positive operating cash flow
• Current ratio of 2.54x — enough short-term assets to cover short-term liabilities
• Liabilities run 0.43x equity — within a conventional range