Companies / Adicet Bio, Inc.
Adicet Bio, Inc.
Nasdaq: ACETCIK 1720580BOSTON, MA
Financials
Ownership
9.4M shares outstanding · as of Aug 3, 2026
Ownership
| Insiders | 0.20% | 18,398 |
| 10%+ / strategic | 16.72% | 1,565,353 |
| Institutions | 54.57% | 5,108,801 |
| Public float | 28.51% | 2,668,938 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 18
View all →| Insider | % of shares | Shares |
|---|---|---|
RA Capital Management, L.P.10% owner | 9.96% | 932,624 |
Schor ChenCEOPresident & CEO · Director | 0.07% | 6,820 |
Harvey Brian NicholasChief Financial Officer | 0.05% | 5,145 |
Healey DonChief Technology Officer | 0.04% | 3,452 |
Aftab BlakeChief Scientific Officer | 0.03% | 2,981 |
Orbimed Advisors LLC10% owner | 0.00% | 0 |
Dubin SteveDirector | — | — |
Kolchinsky Peter10% owner | — | — |
Maltzman Julia D.Chief Medical Officer | — | — |
OrbiMed Advisors Israel II Ltd10% owner | — | — |
Institutional holders 50
View all →| Holder | Value | % of shares |
|---|---|---|
| $8.05M | 12.63% | |
| $7.00M | 10.98% | |
| $5.28M | 6.69% | |
| $5.26M | 6.68% | |
| $2.45M | 3.11% | |
| $2.11M | 2.67% | |
| $1.97M | 2.51% | |
| $1.87M | 2.93% | |
| $1.85M | 2.35% | |
| $1.72M | 2.18% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | RA Capital Management, L.P. 13F manager | Add | — | $1.60M | +234K +24.72% | 1,182,624 12.63% of shares | low |
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Trim | — | $-692.5K | -102K -70.23% | 43,106 0.46% of shares | low |
| Q2 2026 as of | Regeneron Pharmaceuticals, Inc. 13F manager | New | — | $522.8K | +61K | 60,511 0.65% of shares | low |
| Q1 2026 as of | Luminus Management, LLC 13F manager | Exit | — | $-501.5K | -60K -100.00% | — | low |
| Q1 2026 as of | Bridgeway Capital Management, LLC 13F manager | Exit | — | $-474.5K | -56K -100.00% | — | low |
| Q2 2026 as of | Quadrature Capital Ltd 13F manager | New | — | $312.7K | +36K | 36,193 0.39% of shares | low |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | — | $220.7K | +26K +69.81% | 62,126 0.66% of shares | low |
| Q4 2025 as of | Barclays PLC 13F manager | New | — | $210.5K | +25K | 25,000 0.27% of shares | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Tang Capital Management, LLC | Passive13G/A | — |
| RA Capital Management, L.P. | Passive13G/A | — |
| Franklin Resources, Inc. | Passive13G | — |
| Woodline Partners LP | Passive13G | — |
| RA Capital Management, L.P. | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| ACET | — | 007002207 |