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, Q1 2025
Institutional positions in Y-mAbs Therapeutics, Inc. as of Mar 31, 2025. 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
- 103
- −9 vs. Q4 2024
- Shares held
- 28.8M
- +120.5K (+0.4%) vs. Q4 2024
- Total value
- $127.6M
- −$97.0M (−43.2%) vs. Q4 2024
- New holders
- 17
- 40 more added
- Sold out
- 26
- 28 more reduced
1 institution that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Y-mAbs Therapeutics, Inc.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 2,902,025 | $12.9M | 0.00% | −96,447−3.2% | Reduced |
| Acorn Capital Advisors, LLC | 3,235,387 | $14.3M | 9.56% | +373,562+13.1% | Added |
| Paradigm Biocapital Advisors LP | 4,236,346 | $18.8M | 0.86% | 00.0% | Unchanged |
| Logos Global Management LP | 0 | $0 | 0.00% | −1,000,000−100.0% | Sold out |
| Cormorant Asset Management, LP | 0 | $0 | 0.00% | −425,000−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −67,367−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −60,300−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −52,356−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −49,225−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −41,255−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −37,857−100.0% | Sold out |
| Virtus ETF Advisers LLC | 0 | $0 | 0.00% | −35,789−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −33,203−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −32,256−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −27,386−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −18,625−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −17,850−100.0% | Sold out |
| Janus Henderson Group PLC | 0 | $0 | 0.00% | −16,300−100.0% | Sold out |
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −5,900−100.0% | Sold out |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −3,324−100.0% | Sold out |
| Great West Life Assurance Co | 0 | $0 | 0.00% | −3,048−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −2,520−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −550−100.0% | Sold out |
| Bessemer Group Inc | 0 | $0 | 0.00% | −180−100.0% | Sold out |
| UMA Financial Services, Inc. | 0 | $0 | 0.00% | −87−100.0% | Sold out |
| Eagle Bay Advisors LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −45−100.0% | Sold out |
| GAMMA Investing LLC | 0 | $0 | 0.00% | −33−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −23−100.0% | Sold out |
| Nuveen Asset Management, LLC | – | – | – | – | Not filed |