Y-mAbs Therapeutics, Inc.
YMABDelisted Sep 16, 2025- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001722964
Y-mAbs Therapeutics, Inc. was delisted on Sep 16, 2025; its insiders filed their last Form 4 on Sep 19, 2025; 97 institutions reported holding it in 13F filings for Q2 2025, worth $125.9M in total; no superinvestor held it.
13F holders, Q4 2023
Institutional positions in Y-mAbs Therapeutics, Inc. as of Dec 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 94
- −4 vs. Q3 2023
- Shares held
- 20.2M
- +765.3K (+3.9%) vs. Q3 2023
- Total value
- $138.0M
- +$31.8M (+29.9%) vs. Q3 2023
- New holders
- 11
- 37 more added
- Sold out
- 15
- 32 more reduced
1 institution that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting YMAB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 0 | $0 |
| Q4 2025 | 0 | $0 |
| Q3 2025 | 2 | $78.3K |
| Q2 2025 | 97 | $125.9M |
| Q1 2025 | 103 | $127.6M |
| Q4 2024 | 113 | $225.5M |
| Q3 2024 | 105 | $338.5M |
| Q2 2024 | 96 | $294.2M |
| Q1 2024 | 96 | $374.0M |
| Q4 2023 | 94 | $138.0M |
| Q3 2023 | 99 | $107.3M |
| Q2 2023 | 95 | $132.4M |
| Q1 2023 | 86 | $95.4M |
| Q4 2022 | 91 | $94.2M |
| Q3 2022 | 100 | $339.7M |
| Q2 2022 | 91 | $374.7M |
| Q1 2022 | 88 | $300.6M |
| Q4 2021 | 97 | $417.1M |
| Q3 2021 | 97 | $749.0M |
| Q2 2021 | 100 | $886.9M |
| Q1 2021 | 117 | $804.8M |
Institutions, Q4 2023
Shares, value and share of portfolio for each institution holding Y-mAbs Therapeutics, Inc.; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Algert Global LLC | 0 | $0 | 0.00% | −26,670−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | – | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −18,800−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −12,384−100.0% | Sold out |
| Corton Capital Inc. | 0 | $0 | 0.00% | −12,244−100.0% | Sold out |
| Strengthening Families & Communities, LLC | 0 | $0 | 0.00% | −1,650−100.0% | Sold out |
| Cutler Group LP | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −103−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Memorial Sloan Kettering Cancer Center | – | – | – | – | Not filed |