Based on 117 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 ZLAB 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 — 78% of 3.0Y peak
78% of all-time peak
117 funds currently hold this stock — 78% of the 3.0-year high of 150 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 ZLAB is almost the same as a year ago (-3 funds, -2% change). No significant rush to buy or sell — institutional backing is holding steady.
🟠
More sellers than buyers — 44% buying
67 buying84 selling
Last quarter: 84 funds reduced or exited vs 67 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 (+10 vs last Q)
new funds entering per quarter
Funds opening a new ZLAB position: 45 → 32 → 19 → 29. A growing influx of new institutional buyers means the asset is still gathering momentum — the consensus hasn't fully saturated yet.
🔒
52% of holders stayed for 2+ years
■ 52% conviction (2yr+)
■ 28% medium
■ 20% new
61 out of 117 hedge funds have held ZLAB 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.
💎
Buying through price weakness — shares -17%, value -57%
Last quarter: funds added -17% more shares while total portfolio value only changed -57%. Institutions were buying while the price was falling — a high-conviction accumulation signal. They're deliberately loading up on the dip.
📊
Peak discovery — momentum slowing
30 → 45 → 32 → 19 → 29 new funds/Q
New funds entering each quarter: 45 → 32 → 19 → 29. ZLAB is well-known in the hedge fund world, but fresh entries are gradually declining. The explosive phase of institutional discovery is likely behind us.
🏛️
Deep conviction — 61% of holders stayed 2+ years
■ 61% veterans
■ 11% 1-2yr
■ 28% new
Of 122 current holders: 74 (61%) 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.
✅
Strong quality — 23% AUM from major funds
23% from top-100 AUM funds
25 of 117 holders rank in the top 100 by AUM, accounting for 23% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.
Exit risk score 2.7/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.