COMPASS Pathways plc has 8 Schedule 13D or 13G filings on record since 2025-08-14. 2 holders' latest filing reports 5% or more of ordinary shares, par value gbp 0.008 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| RTW Investments, LP | 9.9% | 12,971,571 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| ATAI Life Sciences N.V. | 6% | 5,785,774 | SCHEDULE 13D/A, 2025-10-29 | 2025-10-27 |
| AtaiBeckley Inc. | 4.96% | 4,764,710 | SCHEDULE 13D/A, 2026-02-17 | 2026-01-21 |
| Chen Yu | 3.9% | 3,858,000 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Nantahala Capital Management, LLC | 3.57% | 3,484,315 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Vivo Opportunity Fund Holdings, L.P. | 3.2% | 3,174,494 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Chen Yu | 3.9% | SCHEDULE 13G/A |
| 2025-08-14 | Nantahala Capital Management, LLC | 6.23% | SCHEDULE 13G |
| 2025-08-14 | RTW Investments, LP | 9.9% | SCHEDULE 13G/A |
| 2025-10-29 | ATAI Life Sciences N.V. | 6% | SCHEDULE 13D/A |
| 2025-11-14 | Nantahala Capital Management, LLC | 3.57% | SCHEDULE 13G/A |
| 2025-11-14 | Vivo Opportunity Fund Holdings, L.P. | 3.2% | SCHEDULE 13G/A |
| 2026-02-17 | AtaiBeckley Inc. | 4.96% | SCHEDULE 13D/A |
| 2026-05-15 | RTW Investments, LP | 9.9% | 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.