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, Q2 2021
Institutional positions in Y-mAbs Therapeutics, Inc. as of Jun 30, 2021. 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
- 100
- −17 vs. Q1 2021
- Shares held
- 26.1M
- −370.2K (−1.4%) vs. Q1 2021
- Total value
- $886.9M
- +$82.1M (+10.2%) vs. Q1 2021
- New holders
- 13
- 45 more added
- Sold out
- 30
- 22 more reduced
Compare with Q1 2021: 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, Q2 2021
Shares, value and share of portfolio for each institution holding Y-mAbs Therapeutics, Inc.; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Loomis Sayles & Co L P | 0 | $0 | 0.00% | −782,084−100.0% | Sold out |
| Driehaus Capital Management LLC | 0 | $0 | 0.00% | −352,717−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −284,888−100.0% | Sold out |
| Compagnie Lombard Odier SCmA | 0 | $0 | 0.00% | −181,492−100.0% | Sold out |
| Great Point Partners LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −93,597−100.0% | Sold out |
| California Public Employees Retirement System | 0 | $0 | 0.00% | −55,666−100.0% | Sold out |
| Pinz Capital Management, LP | 0 | $0 | 0.00% | −41,295−100.0% | Sold out |
| Aviva PLC | 0 | $0 | 0.00% | −38,351−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −32,200−100.0% | Sold out |
| AlphaCentric Advisors LLC | 0 | $0 | 0.00% | −22,000−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −20,800−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −17,700−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −15,200−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −12,988−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −11,800−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −10,433−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −8,295−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −8,036−100.0% | Sold out |
| AMP Capital Investors Ltd | 0 | $0 | 0.00% | −7,700−100.0% | Sold out |
| Martingale Asset Management L P | 0 | $0 | 0.00% | −7,304−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −7,204−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −6,790−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −1,812−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −1,524−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −1,350−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −945−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −243−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −181−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −40−100.0% | Sold out |