CABA: Cabaletta Bio, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | 13G amendment | Cormorant Asset Management, LP | 5.95% | SEC | |
| 2026-08-14 | 13G amendment | T. Rowe Price Investment Management, Inc. | 11.60% | SEC | |
| 2026-08-14 | 13G amendment | Bain Capital Life Sciences Opportunities III, LP | 9.99% | SEC | |
| 2026-08-12 | 13G amendment | Adage Capital Management, L.P. | 8.43% | SEC | |
| 2026-08-12 | New 13G stake | Norges Bank | 5.38% | SEC | |
| 2026-07-31 | New 13G stake | Vanguard Capital Management | 5.08% | SEC | |
| 2026-07-27 | New 13G stake | BlackRock, Inc. | 5.90% | SEC |
Institutional ownership (Q2 2026)
139 institutions reported holding $418.24M of Cabaletta Bio, Inc. on Form 13F (108 the quarter before). 54 opened a new position and 23 sold out. Shares held by institutions: +87%.
| Largest holders | Shares | Value |
|---|---|---|
| JENNISON ASSOCIATES LLC | 20,033,730 | $62.30M |
| Bain Capital Life Sciences Investors, LLC | 17,241,445 | $53.62M |
| BlackRock, Inc. | 10,754,701 | $33.45M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 9,174,758 | $28.53M |
| STATE STREET CORP | 7,839,305 | $24.38M |
| VANGUARD CAPITAL MANAGEMENT LLC | 7,227,018 | $22.48M |
| Cormorant Asset Management, LP | 5,000,000 | $15.55M |
| Woodline Partners LP | 4,200,142 | $13.06M |
| NORGES BANK | 4,112,401 | $12.79M |
| Opaleye Management Inc. | 3,863,800 | $12.02M |
Get new insider and activist filings the morning after: daily alerts. Not investment advice.