Based on 508 hedge funds · latest filing: 2025 Q4 · updated quarterly
📉
Selling streak — 3 quarters in a row
For 3 consecutive quarters, more hedge funds reduced or closed their BMRN positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.
📊
High ownership — 93% of 3.0Y peak
93% of all-time peak
508 funds currently hold this stock — 93% of the 3.0-year high of 547 funds (reached 2025 Q1). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.
〰️
Stable — ownership unchanged year-over-year
fund count last 6Q
The number of hedge funds holding BMRN is almost the same as a year ago (+2 funds, +0% change). No significant rush to buy or sell — institutional backing is holding steady.
🟠
More sellers than buyers — 45% buying
270 buying336 selling
Last quarter: 336 funds reduced or exited vs 270 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.
📈
More new buyers each quarter (+27 vs last Q)
new funds entering per quarter
Funds opening a new BMRN position: 99 → 83 → 73 → 100. A growing influx of new institutional buyers means the asset is still gathering momentum — the consensus hasn't fully saturated yet.
🔒
60% of holders stayed for 2+ years
■ 60% conviction (2yr+)
■ 21% medium
■ 18% new
307 out of 508 hedge funds have held BMRN for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
➡️
Steady discovery — ~100 new funds/quarter
78 → 99 → 83 → 73 → 100 new funds/Q
New funds entering each quarter: 99 → 83 → 73 → 100. Consistent flow of new institutional buyers without clear acceleration or slowdown.
🏛️
Deep conviction — 67% of holders stayed 2+ years
■ 67% veterans
■ 10% 1-2yr
■ 23% new
Of 538 current holders: 361 (67%) have held for over 2 years without selling. These are not momentum buyers — they have lived through drawdowns and stayed. A large veteran base acts as a stabilizing force during selloffs.
🏆
Elite ownership — 46% AUM from top-100 funds
46% from top-100 AUM funds
45 of 508 holders are among the 100 largest funds by AUM, controlling 46% of total institutional value in BMRN. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
Exit risk score 3.4/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.