Avidity Biosciences, Inc. has 15 Schedule 13D or 13G filings on record since 2025-08-07. 3 holders' latest filing reports 5% or more of common stock, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| The Vanguard Group | 9.57% | 13,219,759 | SCHEDULE 13G/A, 2025-10-30 | 2025-09-30 |
| BlackRock, Inc. | 6.4% | 8,631,771 | SCHEDULE 13G/A, 2025-10-17 | 2025-09-30 |
| Avoro Capital Advisors LLC | 5.54% | 8,515,792 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| Janus Henderson Group Plc | 4.6% | 6,939,503 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| RTW Investments, LP | 3.1% | 4,686,110 | SCHEDULE 13D/A, 2025-10-29 | 2025-10-27 |
| Fmr LLC | 2.1% | 2,958,712 | SCHEDULE 13G/A, 2025-11-07 | 2025-10-31 |
| Wellington Management Group LLP | 0.5% | 723,118 | SCHEDULE 13G/A, 2026-02-10 | 2025-12-31 |
| T. Rowe Price Associates, Inc. | 0.1% | 142,888 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| RA Capital Management, L.P. | 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-07 | Janus Henderson Group Plc | 10.1% | SCHEDULE 13G/A |
| 2025-10-17 | BlackRock, Inc. | 6.4% | SCHEDULE 13G/A |
| 2025-10-29 | RTW Investments, LP | 3.1% | SCHEDULE 13D/A |
| 2025-10-30 | The Vanguard Group | 9.57% | SCHEDULE 13G/A |
| 2025-11-05 | Fmr LLC | 15% | SCHEDULE 13G/A |
| 2025-11-07 | Fmr LLC | 2.1% | SCHEDULE 13G/A |
| 2025-11-14 | T. Rowe Price Associates, Inc. | 7.1% | SCHEDULE 13G/A |
| 2025-11-14 | RA Capital Management, L.P. | 5.9% | SCHEDULE 13G/A |
| 2025-11-14 | Janus Henderson Group Plc | 10.7% | SCHEDULE 13G/A |
| 2025-12-05 | Janus Henderson Group Plc | 5.5% | SCHEDULE 13G/A |
| 2026-02-10 | Wellington Management Group LLP | 0.5% | SCHEDULE 13G/A |
| 2026-02-17 | T. Rowe Price Associates, Inc. | 0.1% | SCHEDULE 13G/A |
| 2026-02-17 | Avoro Capital Advisors LLC | 5.54% | SCHEDULE 13G/A |
| 2026-02-17 | Janus Henderson Group Plc | 4.6% | SCHEDULE 13G/A |
| 2026-05-15 | RA Capital Management, L.P. | 0% | 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.