Bright Minds Biosciences Inc. has 17 Schedule 13D or 13G filings on record since 2025-08-13. 5 holders' latest filing reports 5% or more of common shares. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Ian McDonald | 13.7% | 1,396,665 | SCHEDULE 13D/A, 2026-07-02 | 2024-11-04 |
| Janus Henderson Group Plc | 13.1% | 1,284,324 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Cormorant Asset Management, LP | 9.17% | 900,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Vivo Opportunity Fund Holdings, L.P. | 5.2% | 504,645 | SCHEDULE 13G/A, 2026-05-12 | 2026-03-31 |
| Vestal Point Capital, LP | 5% | 492,319 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Perceptive Advisors LLC | 4.6% | 449,290 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| Adage Capital Management, L.P. | 3.41% | 335,000 | SCHEDULE 13G/A, 2026-08-12 | 2026-06-30 |
| Sio Capital Management, LLC | 2.69% | 190,764 | SCHEDULE 13G/A, 2025-11-12 | 2025-09-30 |
| Commodore Capital LP | 0.3% | 18,851 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
Purpose of Transaction (Item 4)
Ian McDonald
The purpose of this statement is to report aggregate reductions in ownership of securities held by the Reporting Person of one percent (1%) or more of the securities of the Issuer then outstanding, as a result of distributions of securities by the Issuer, as of: - November 4, 2024, when the Reporting Person had the sole power to vote or to direct the voting of, or to dispose or to direct the disposition of 1,396,665 Common Shares representing approximately 19.0% of the Issuer's issued and outstanding Common Shares inclusive of Common Shares issuable to the Reporting Person pursuant to the Derivative Securities held by the Reporting Person; - September 9, 2025, when the Reporting Person had the sole power to vote or to direct the voting of, or to dispose or to direct the disposition of 1,396,665 Common Shares representing approximately 17.9% of the Issuer's issued and outstanding Common Shares inclusive of Common Shares issuable to the Reporting Person pursuant to the Derivative Securities held by the Reporting Person; and - January 9, 2026, when the Reporting Person had the sole power to vote or to direct the voting of, or to dispose or to direct the disposition of 1,396,665 Common Shares representing approximately 13.8% of the Issuer's issued and outstanding Common Shares inclusive of Common Shares issuable to the Reporting Person pursuant to the Derivative Securities held by the Reporting Person. The Reporting Person may, depending on market and other conditions, increase …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-07-02; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Sio Capital Management, LLC | 7.27% | SCHEDULE 13G/A |
| 2025-08-14 | Janus Henderson Group Plc | 16.3% | SCHEDULE 13G/A |
| 2025-11-12 | Sio Capital Management, LLC | 2.69% | SCHEDULE 13G/A |
| 2025-11-13 | Adage Capital Management, L.P. | 5.58% | SCHEDULE 13G |
| 2025-11-14 | Vivo Opportunity Fund Holdings, L.P. | 6.4% | SCHEDULE 13G |
| 2026-02-06 | Cormorant Asset Management, LP | 10.88% | SCHEDULE 13G/A |
| 2026-02-17 | Perceptive Advisors LLC | 4.6% | SCHEDULE 13G/A |
| 2026-02-17 | Janus Henderson Group Plc | 14.9% | SCHEDULE 13G/A |
| 2026-02-17 | Commodore Capital LP | 0.3% | SCHEDULE 13G/A |
| 2026-04-30 | Cormorant Asset Management, LP | 9.71% | SCHEDULE 13G/A |
| 2026-05-12 | Vivo Opportunity Fund Holdings, L.P. | 5.2% | SCHEDULE 13G/A |
| 2026-05-15 | Vestal Point Capital, LP | 5% | SCHEDULE 13G |
| 2026-05-15 | Janus Henderson Group Plc | 13.1% | SCHEDULE 13G/A |
| 2026-05-15 | Janus Henderson Group Plc | 13.1% | SCHEDULE 13G/A |
| 2026-07-02 | Ian McDonald | 13.7% | SCHEDULE 13D/A |
| 2026-08-12 | Adage Capital Management, L.P. | 3.41% | SCHEDULE 13G/A |
| 2026-08-14 | Cormorant Asset Management, LP | 9.17% | SCHEDULE 13G/A |
Tools for this story
Each opens in a new tab, filled in for Bright Minds Biosciences Inc.. With no account yet, you sign up free and land on the result.
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.