Cabaletta Bio Inc has 31 Schedule 13D or 13G filings on record since 2025-07-16. 9 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 11.6% | 18,869,907 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Jennison Associates LLC | 11.4% | 24,267,980 | SCHEDULE 13G/A, 2026-06-04 | 2026-05-29 |
| Prudential Financial Inc | 11.4% | 24,267,980 | SCHEDULE 13G/A, 2026-06-05 | |
| Bain Capital Life Sciences Opportunities III, LP | 9.99% | 17,241,445 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Adage Capital Management, L.P. | 8.43% | 14,174,758 | SCHEDULE 13G/A, 2026-08-12 | 2026-06-30 |
| Cormorant Asset Management, LP | 5.95% | 10,000,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| BlackRock, Inc. | 5.9% | 9,613,912 | SCHEDULE 13G, 2026-07-27 | 2026-06-30 |
| Norges Bank | 5.38% | 8,775,653 | SCHEDULE 13G, 2026-08-12 | 2026-06-30 |
| Vanguard Capital Management | 5.08% | 8,295,783 | SCHEDULE 13G, 2026-07-31 | 2026-06-30 |
| Alyeska Investment Group, L.P. | 4.67% | 4,500,000 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| The Vanguard Group | 3.83% | 3,450,727 | SCHEDULE 13G/A, 2025-07-29 | 2025-06-30 |
| Kenneth Griffin | 3.4% | 3,150,275 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Nichtberger Steven | 3.3% | 3,034,499 | SCHEDULE 13G/A, 2025-08-11 | 2025-06-30 |
| Millennium Management LLC | 1.3% | 2,068,491 | SCHEDULE 13G/A, 2026-07-23 | 2026-06-30 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-16 | BlackRock, Inc. | 1% | SCHEDULE 13G/A |
| 2025-07-29 | The Vanguard Group | 3.83% | SCHEDULE 13G/A |
| 2025-08-06 | Jennison Associates LLC | 7.2% | SCHEDULE 13G/A |
| 2025-08-06 | Prudential Financial Inc | 7.4% | SCHEDULE 13G/A |
| 2025-08-11 | Nichtberger Steven | 3.3% | SCHEDULE 13G/A |
| 2025-08-12 | Adage Capital Management, L.P. | 9.99% | SCHEDULE 13G/A |
| 2025-08-14 | Bain Capital Life Sciences Opportunities III, LP | 9.99% | SCHEDULE 13G/A |
| 2025-08-14 | Cormorant Asset Management, LP | 5.47% | SCHEDULE 13G |
| 2025-08-14 | Alyeska Investment Group, L.P. | 9.9% | SCHEDULE 13G |
| 2025-11-05 | Jennison Associates LLC | 8.9% | SCHEDULE 13G/A |
| 2025-11-07 | Prudential Financial Inc | 8.9% | SCHEDULE 13G/A |
| 2025-11-07 | T. Rowe Price Investment Management, Inc. | 9.1% | SCHEDULE 13G/A |
| 2025-11-07 | T. Rowe Price Investment Management, Inc. | 11.3% | SCHEDULE 13G/A |
| 2025-11-14 | Kenneth Griffin | 3.4% | SCHEDULE 13G/A |
| 2025-11-14 | Cormorant Asset Management, LP | 9.99% | SCHEDULE 13G/A |
| 2025-11-14 | Alyeska Investment Group, L.P. | 6.03% | SCHEDULE 13G/A |
| 2026-02-17 | Cormorant Asset Management, LP | 9.28% | SCHEDULE 13G/A |
| 2026-02-17 | Alyeska Investment Group, L.P. | 4.67% | SCHEDULE 13G/A |
| 2026-02-17 | T. Rowe Price Investment Management, Inc. | 10.2% | SCHEDULE 13G/A |
| 2026-02-18 | Millennium Management LLC | 5.3% | SCHEDULE 13G |
| 2026-05-15 | Cormorant Asset Management, LP | 9.03% | SCHEDULE 13G/A |
| 2026-06-04 | Jennison Associates LLC | 11.4% | SCHEDULE 13G/A |
| 2026-06-05 | Prudential Financial Inc | 11.4% | SCHEDULE 13G/A |
| 2026-07-23 | Millennium Management LLC | 1.3% | SCHEDULE 13G/A |
| 2026-07-27 | BlackRock, Inc. | 5.9% | SCHEDULE 13G |
| 2026-07-31 | Vanguard Capital Management | 5.08% | SCHEDULE 13G |
| 2026-08-12 | Adage Capital Management, L.P. | 8.43% | SCHEDULE 13G/A |
| 2026-08-12 | Norges Bank | 5.38% | SCHEDULE 13G |
| 2026-08-14 | Cormorant Asset Management, LP | 5.95% | SCHEDULE 13G/A |
| 2026-08-14 | Bain Capital Life Sciences Opportunities III, LP | 9.99% | SCHEDULE 13G/A |
| 2026-08-14 | T. Rowe Price Investment Management, Inc. | 11.6% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.