Y-mAbs Therapeutics, Inc. has 9 Schedule 13D or 13G filings on record since 2025-08-12. 1 holder's latest filing reports 5% or more of common stock, $0.0001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Anders Hove | 6.2% | 2,796,297 | SCHEDULE 13G/A, 2025-08-20 | 2025-08-19 |
| Beryl Capital Management LLC | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Glazer Capital, LLC | 0% | 0 | SCHEDULE 13G/A, 2025-11-13 | 2025-09-30 |
| Caligan Partners LP | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| HBM Healthcare Investments (Cayman) Ltd. | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Paradigm BioCapital Advisors LP | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | Beryl Capital Management LLC | 9% | SCHEDULE 13G |
| 2025-08-15 | Glazer Capital, LLC | 5.84% | SCHEDULE 13G |
| 2025-08-15 | Anders Hove | 7% | SCHEDULE 13G/A |
| 2025-08-20 | Anders Hove | 6.2% | SCHEDULE 13G/A |
| 2025-11-13 | Glazer Capital, LLC | 0% | SCHEDULE 13G/A |
| 2025-11-14 | Caligan Partners LP | 0% | SCHEDULE 13G/A |
| 2025-11-14 | Beryl Capital Management LLC | 0% | SCHEDULE 13G/A |
| 2025-11-14 | HBM Healthcare Investments (Cayman) Ltd. | 0% | SCHEDULE 13G/A |
| 2025-11-14 | Paradigm BioCapital Advisors LP | 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.