Based on 36 hedge funds · latest filing: 2025 Q4 · updated quarterly
📉
Selling streak — 1 quarter in a row
For 1 consecutive quarter, more hedge funds reduced or closed their ATLN 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 — 92% of 3.0Y peak
92% of all-time peak
36 funds currently hold this stock — 92% of the 3.0-year high of 39 funds (reached 2025 Q3). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.
🚀
Fast accumulation — +3500% more funds vs a year ago
fund count last 6Q
+35 new funds entered over the past year (+3500% 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.
🔴
Heavy selling pressure — only 35% buying
13 buying24 selling
Last quarter: 24 funds sold vs only 13 buyers. This is widespread institutional distribution — not a few funds rebalancing, but a broad exit. High conviction bearish signal.
⚠️
Fewer new buyers each quarter (-10 vs last Q)
new funds entering per quarter
Funds opening this position for the first time: 8 → 20 → 15 → 5. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.
🔄
Mostly new holders — 81% entered in last year
■ 3% conviction (2yr+)
■ 17% medium
■ 81% new
Only 1 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.
💎
Buying through price weakness — shares -1%, value -57%
Last quarter: funds added -1% 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
0 → 8 → 20 → 15 → 5 new funds/Q
New funds entering each quarter: 8 → 20 → 15 → 5. ATLN is well-known in the hedge fund world, but fresh entries are gradually declining. The explosive phase of institutional discovery is likely behind us.
🌱
Early stage — 94% of holders entered in last year
■ 6% veterans
■ 0% 1-2yr
■ 94% new
Of 36 current holders: 34 (94%) entered in the past year, only 2 (6%) 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.
🏆
Elite ownership — 53% AUM from top-100 funds
53% from top-100 AUM funds
17 of 36 holders are among the 100 largest funds by AUM, controlling 53% of total institutional value in ATLN. 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 7.4/10 — multiple crowding signals converge. Institutional ownership is at 92% of its all-time high — near peak crowding. Selling pressure exceeds buying: only 35% of active funds buying. Crowded trades can unwind fast — a single catalyst can trigger a cascade.