Based on 103 hedge funds · latest filing: 2025 Q4 · updated quarterly
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Buying streak — 3 quarters in a row
For 3 consecutive quarters, more hedge funds added JBIO than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
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At the ownership peak (100% of max)
100% of all-time peak
103 hedge funds hold JBIO right now — the highest count in 3.0 years. When ownership is this concentrated, any bad news can trigger a chain reaction: one big fund sells, others follow. This is a classic 'crowded trade' — high popularity doesn't equal safety.
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Fast accumulation — +10200% more funds vs a year ago
fund count last 6Q
+102 new funds entered over the past year (+10200% YoY). That's a rapid rush of institutional money. Fast accumulation often signals a major thesis — but it also means the stock could fall quickly if that thesis breaks.
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More buyers than sellers — 82% buying
78 buying17 selling
Last quarter: 78 funds were net buyers (35 opened a brand new position + 43 added to an existing one). Only 17 were sellers (12 trimmed + 5 sold completely). A clear majority buying is a strong confirmation signal.
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More new buyers each quarter (+26 vs last Q)
new funds entering per quarter
Funds opening a new JBIO position: 0 → 67 → 9 → 35. A growing influx of new institutional buyers means the asset is still gathering momentum — the consensus hasn't fully saturated yet.
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Mostly new holders — 92% entered in last year
■ 3% conviction (2yr+)
■ 5% medium
■ 92% new
Only 3 funds (3%) have held >2 years. The majority of current holders are relatively new to the position. New holders tend to sell faster when prices drop — a shallow conviction base that could amplify any sell-off.
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Value +166% but shares only +49% — price-driven
Last quarter: the total dollar value of institutional holdings rose +166%, but actual share count only changed +49%. The gap is explained by the stock's price rising — not new buying. Strong value growth with weak share growth means the rally is price momentum, not fresh institutional demand.
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Peak discovery — momentum slowing
1 → 0 → 67 → 9 → 35 new funds/Q
New funds entering each quarter: 0 → 67 → 9 → 35. JBIO is well-known in the hedge fund world, but fresh entries are gradually declining. The explosive phase of institutional discovery is likely behind us.
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Early stage — 92% of holders entered in last year
■ 8% veterans
■ 0% 1-2yr
■ 92% new
Of 104 current holders: 96 (92%) entered in the past year, only 8 (8%) are 2+ year veterans. This is an early-phase institutional idea — still being discovered. High upside potential if the thesis plays out, but thin conviction base.
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Strong quality — 25% AUM from major funds
25% from top-100 AUM funds
24 of 103 holders rank in the top 100 by AUM, accounting for 25% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.
Exit risk score 7.3/10 — multiple crowding signals converge. Institutional ownership is at 100% of its all-time high — near peak crowding. Crowded trades can unwind fast — a single catalyst can trigger a cascade.