Y-Mabs TherapeuticsYMAB
13F holders, Q2 2025 (June 30)97holders −5
12new positions
20sold out
5famous investors
$4.51avg. 13F price*
At the end of Q2 2025, 97 institutions reported holding Y-Mabs Therapeutics Inc. (YMAB) in their 13F filings, down 5 from Q1 2025. 12 opened new positions and 20 sold out. The largest holders were Paradigm Biocapital Advisors LP ($19.1M), Acorn Capital Advisors, LLC ($15.4M) and BlackRock, Inc. ($12.4M). 5 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Y-Mabs Therapeutics Inc.
- CUSIP
- 984241109
- Latest filing quarter
- Q3 2025
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 12 | $2.4M |
| Exits | 20 | $4.1M |
All 13F filers, Q1 2025 → Q2 2025: 1,490,841 shares bought and 2,393,248 shares sold, net −902,407 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 97 holders
| Paradigm Biocapital Advisors LP | 0.82% | No change | 4,236,346 | $19.1M |
| Acorn Capital Advisors, LLC | 10.09% | Add +5.7% | 3,418,995 | $15.4M |
| BlackRock, Inc. | 0.00% | Reduce -5.3% | 2,748,077 | $12.4M |
| Caligan Partners LP | 2.05% | No change | 2,342,609 | $10.6M |
| Sofinnova Investments, Inc. | 0.67% | No change | 2,194,278 | $9.9M |
| Vanguard Group Inc. | 0.00% | Reduce -0.2% | 1,943,285 | $8.8M |
| Polar Capital Holdings Plc | 0.04% | Reduce -2.3% | 1,789,800 | $8.1M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.1% | 848,461 | $3.8M |
| State Street Corp. | 0.00% | Reduce -1.1% | 780,145 | $3.5M |
| Boothbay Fund Management, LLC | 0.10% | No change | 693,693 | $3.1M |
| D. E. Shaw & Co. | 0.00% | Reduce -6.0% | 516,857 | $2.3M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -1.5% | 412,246 | $1.9M |
| Nantahala Capital Management, LLC | 0.11% | New | 351,878 | $1.6M |
| Soleus Capital Management, L.P. | 0.11% | No change | 349,982 | $1.6M |
| Northern Trust Corp. | 0.00% | Reduce -6.0% | 308,130 | $1.4M |
| Morgan Stanley | 0.00% | Reduce -41.5% | 292,567 | $1.3M |
| Stonepine Capital Management, LLC | 1.27% | Add +117.5% | 285,300 | $1.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.2% | 278,179 | $1.3M |
| Bank of America Corp. | 0.00% | Reduce -2.9% | 274,164 | $1.2M |
| AQR Capital Management | 0.00% | Add +53.0% | 252,142 | $1.1M |
| UBS Group AG | 0.00% | Add +150.1% | 229,072 | $1.0M |
| Goldman Sachs Group Inc. | 0.00% | Add +5.4% | 212,751 | $960K |
| Citadel Advisors | 0.00% | Add +34.9% | 207,642 | $936K |
| Gsa Capital Partners LLP | 0.06% | Add +801.9% | 186,062 | $839K |
| Renaissance Technologies | 0.00% | Reduce -36.1% | 164,100 | $740K |
| JPMorgan Chase & Co. | 0.00% | Reduce -33.7% | 164,055 | $740K |
| Infinitum Asset Management, LLC | 0.16% | No change | 155,529 | $701K |
| Jacobs Levy Equity Management, Inc. | 0.00% | Reduce -39.9% | 142,641 | $643K |
| Millennium Management | 0.00% | Reduce -70.0% | 139,955 | $631K |
| Two Sigma Investments, LP | 0.00% | Reduce -19.1% | 125,298 | $565K |
| Federated Hermes, Inc. | 0.00% | Reduce -22.2% | 119,425 | $539K |
| Two Sigma Advisers, LP | 0.00% | Reduce -19.3% | 115,700 | $522K |
| Rice Hall James & Associates, LLC | 0.03% | Add +5.8% | 109,604 | $494K |
| Bank of New York Mellon Corp | 0.00% | Add +7.4% | 99,352 | $448K |
| BNP Paribas Financial Markets | 0.00% | Reduce -1.2% | 94,383 | $426K |
| Nuveen, LLC | 0.00% | Reduce -16.9% | 93,418 | $421K |
| XTX Topco Ltd | 0.02% | Reduce -5.5% | 86,440 | $390K |
| Barclays PLC | 0.00% | Add +55.8% | 72,842 | $329K |
| Cubist Systematic Strategies, LLC | 0.00% | Reduce -55.0% | 69,908 | $315K |
| Rhumbline Advisers | 0.00% | Add +26.9% | 68,399 | $308K |
| STRS Ohio | 0.00% | Add +43.8% | 62,400 | $281K |
| Jump Financial, LLC | 0.00% | Add +61.5% | 61,500 | $277K |
| Jane Street Group, LLC | 0.00% | New | 60,873 | $275K |
| Alliancebernstein L.P. | 0.00% | Add +8.4% | 59,380 | $268K |
| Bridgeway Capital Management, LLC | 0.01% | Add +123.7% | 55,700 | $251K |
| State of Wisconsin Investment Board | 0.00% | New | 51,336 | $232K |
| Susquehanna International Group, LLP | 0.00% | Reduce -15.8% | 51,090 | $230K |
| Sapient Capital LLC | 0.00% | No change | 43,700 | $197K |
| Invesco Ltd. | 0.00% | Add +31.6% | 42,833 | $193K |
| Marshall Wace, LLP | 0.00% | New | 40,181 | $181K |
| AlphaQuest LLC | 0.02% | No change | 38,925 | $176K |
| FMR LLC | 0.00% | Add +5.5% | 30,868 | $139K |
| Deutsche Bank AG | 0.00% | No change | 28,803 | $130K |
| Alps Advisors Inc. | 0.00% | Reduce -26.7% | 24,429 | $110K |
| MetLife Investment Management, LLC | 0.00% | Add +28.4% | 21,928 | $99K |
| Intech Investment Management LLC | 0.00% | Reduce -18.8% | 21,674 | $98K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -4.2% | 21,185 | $96K |
| Wells Fargo & Company | 0.00% | Add +6.6% | 19,037 | $86K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 17,211 | $78K |
| Citigroup Inc. | 0.00% | Reduce -46.5% | 15,250 | $69K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 14,596 | $66K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -5.7% | 13,143 | $59K |
| Squarepoint Ops LLC | 0.00% | Reduce -90.5% | 12,233 | $55K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.01% | Reduce -60.9% | 12,171 | $55K |
| HSBC Holdings PLC | 0.00% | New | 11,948 | $55K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +129.0% | 11,494 | $52K |
| Voya Investment Management LLC | 0.00% | Add +5.2% | 10,742 | $48K |
| Los Angeles Capital Management LLC | 0.00% | New | 10,284 | $46K |
| New York State Common Retirement Fund | 0.00% | No change | 10,110 | $46K |
| China Universal Asset Management Co., Ltd. | 0.00% | Add +1.3% | 9,097 | $41K |
| Raymond James Financial Inc. | 0.00% | New | 7,701 | $35K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 7,327 | $33K |
| Cwm, LLC | 0.00% | Add +203.0% | 7,121 | $32K |
| Brooklyn Investment Group | 0.00% | Reduce -16.4% | 4,951 | $22K |
| Legal & General Group Plc | 0.00% | Reduce -51.8% | 4,131 | $19K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,701 | $17K |
| California State Teachers Retirement System | 0.00% | No change | 2,665 | $12K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +16.3% | 1,750 | $8K |
| Royal Bank of Canada | 0.00% | Reduce -5.7% | 1,612 | $7K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +2775.0% | 1,265 | $6K |
| GF Fund Management Co. LTD. | 0.00% | No change | 1,111 | $5K |
| Amalgamated Bank | 0.00% | No change | 1,217 | $5K |
| Essential Partners LLC | 0.00% | — | 930 | $4K |
| IFP Advisors, Inc | 0.00% | Add +0.0% | 334 | $2K |
| Point72 (DIFC) Ltd | 0.00% | Reduce -94.3% | 287 | $1K |
| Daiwa Securities Group Inc. | 0.00% | No change | 162 | $1K |
| Allworth Financial LP | 0.00% | New | 201 | $907 |
| PNC Financial Services Group, Inc. | 0.00% | New | 129 | $582 |
| Rialto Wealth Management, LLC | 0.00% | New | 122 | $551 |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -59.9% | 104 | $469 |
| Sterling Capital Management LLC | 0.00% | Add +128.9% | 87 | $392 |
| Rothschild Investment LLC | 0.00% | Reduce -54.5% | 50 | $226 |
| True Wealth Design, LLC | 0.00% | Add +70.6% | 29 | $131 |
| SBI Securities Co., Ltd. | 0.00% | No change | 16 | $72 |
| Clearstead Advisors, LLC | 0.00% | New | 9 | $41 |
| Osaic Holdings, Inc. | 0.00% | New | 4 | $18 |
| Farther Finance Advisors, LLC | 0.00% | Reduce -100.0% | 1 | $5 |
"% of holder's portfolio" is YMAB's weight in each manager's 13F, not the share of Y-Mabs Therapeutics Inc. the manager owns.