As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of COMPASS Pathways plc. The largest reported stake is RTW Investments, LP's, at 9.9%. 9 filings are on record since August 14, 2025 (Schedule 13G/A, May 15, 2026).
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Key facts
- · Reporting person: BIT Capital GmbH · Sole voting: 8,148,280 · Shared voting: 0 · Sole dispositive: 8,148,280 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-28
- · Reporting person: RTW Investments, LP · Sole voting: 0 · Shared voting: 12,971,571 · Sole dispositive: 0 · Shared dispositive: 12,971,571 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: AtaiBeckley Inc. · Sole voting: 0 · Shared voting: 4,764,710 · Sole dispositive: 0 · Shared dispositive: 4,764,710 · SCHEDULE 13D/A, 2026-02-17
- · Reporting person: Vivo Opportunity Fund Holdings, L.P. · Sole voting: 3,174,494 · Shared voting: 0 · Sole dispositive: 3,174,494 · Shared dispositive: 0 · SCHEDULE 13G/A, 2025-11-14
- · Holder: Nantahala Capital Management, LLC · Percent: 3.57% · SCHEDULE 13G/A
COMPASS Pathways plc has 9 Schedule 13D or 13G filings on record since 2025-08-14. 3 holders' latest filing reports 5% or more of american depositary shares. 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 |
| BIT Capital GmbH | 5.9% | 8,148,280 | SCHEDULE 13G, 2026-10-28 | 2026-09-30 |
| AtaiBeckley Inc. | 4.96% | 4,764,710 | SCHEDULE 13D/A, 2026-02-17 | 2026-01-21 |
| 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 |
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More on COMPASS Pathways plc and the records around it.
COMPASS Pathways plc elsewhere on the record
Companies that share a holder
- BIT Capital GmbH also filed stake reports on 1 other company: Freenome, Inc. (Aug 2026)
- TCG Crossover GP I, LLC also filed stake reports on 6 other companies: Abivax SA (Aug 2026), Entrada Therapeutics, Inc. (Aug 2026), Vistagen Therapeutics, Inc. (Aug 2026)
- Vivo Opportunity Fund Holdings, L.P. also filed stake reports on 20 other companies: ArriVent BioPharma, Inc. (Oct 2026), Clene Inc. (Aug 2026), Compass Therapeutics, Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| RTW Investments, LP | 0 | 12,971,571 | 0 | 12,971,571 | SCHEDULE 13G/A, 2026-05-15 |
| Roderick Wong | 0 | 12,971,571 | 0 | 12,971,571 | SCHEDULE 13G/A, 2026-05-15 |
| BIT Capital GmbH | 8,148,280 | 0 | 8,148,280 | 0 | SCHEDULE 13G, 2026-10-28 |
| AtaiBeckley Inc. | 0 | 4,764,710 | 0 | 4,764,710 | SCHEDULE 13D/A, 2026-02-17 |
| Vivo Opportunity Fund Holdings, L.P. | 3,174,494 | 0 | 3,174,494 | 0 | SCHEDULE 13G/A, 2025-11-14 |
| Vivo Opportunity, LLC | 3,174,494 | 0 | 3,174,494 | 0 | SCHEDULE 13G/A, 2025-11-14 |
| Vivo Opportunity Cayman Fund, L.P. | 187,891 | 0 | 187,891 | 0 | SCHEDULE 13G/A, 2025-11-14 |
| Vivo Opportunity Cayman, LLC | 187,891 | 0 | 187,891 | 0 | SCHEDULE 13G/A, 2025-11-14 |
The latest filing identifies COMPASS Pathways plc by CUSIP 20451W101 and gives its principal executive office as 3RD FLOOR, 1 ASHLEY ROAD, ALTRINCHAM, CHESIRE (SCHEDULE 13G, 2026-10-28).
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 |
| 2026-10-28 | BIT Capital GmbH | 5.9% | SCHEDULE 13G |
Questions about who owns COMPASS Pathways plc
Who owns COMPASS Pathways plc?
On this page, 3 holders' latest ownership filings report 5% or more of COMPASS Pathways plc: RTW Investments, LP (9.9%, Schedule 13G/A, filed 2026-05-15), ATAI Life Sciences N.V. (6%, Schedule 13D/A, filed 2025-10-29) and BIT Capital GmbH (5.9%, Schedule 13G, filed 2026-10-28).
Who are the largest shareholders of COMPASS Pathways plc?
By the share each holder's latest filing reports, the largest holders of COMPASS Pathways plc on this page are RTW Investments, LP (9.9%), ATAI Life Sciences N.V. (6%) and BIT Capital GmbH (5.9%).
When did RTW Investments, LP buy into COMPASS Pathways plc?
The filings give report dates, not purchase dates. The earliest filing from RTW Investments, LP on this page is the Schedule 13G/A, filed 2025-08-14, reporting 9.9%; its latest, Schedule 13G/A filed 2026-05-15, reports 9.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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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.