Y-mAbs Therapeutics Ownership | Who Owns Y-mAbs Therapeutics?
Y-mAbs Therapeutics Ownership Summary
Y-mAbs Therapeutics is owned by 61.55% institutional investors, 11.97% insiders, and 26.47% retail investors. Paradigm biocapital advisors lp is the largest institutional shareholder, holding 9.49% of YMAB shares. HBM Healthcare Investments AG Ord is the top mutual fund, with 7.28% of its assets in Y-mAbs Therapeutics shares.
YMAB Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Y-mAbs Therapeutics | 61.55% | 11.97% | 26.47% |
| Sector | Healthcare Stocks | 486.50% | 11.08% | -397.59% |
| Industry | Biotech Stocks | 304.14% | 11.08% | -215.23% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Paradigm biocapital advisors lp | 4.24M | 9.49% | $33.17M |
| Blackrock | 2.94M | 6.71% | $35.50M |
| Blackrock funding, inc. /de | 2.75M | 6.06% | $12.39M |
| Sofinnova investments | 2.19M | 4.84% | $9.90M |
| Vanguard group | 2.00M | 4.48% | $15.66M |
| Caligan partners lp | 1.77M | 3.96% | $13.84M |
| Polar capital | 1.79M | 3.95% | $8.07M |
| Geode capital management | 822.31K | 1.84% | $6.44M |
| State street | 804.61K | 1.84% | $9.72M |
| Boothbay fund management | 693.69K | 1.53% | $3.13M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Caligan partners lp | 1.77M | 3.51% | $13.84M |
| Stonepine capital management | 285.30K | 1.26% | $1.29M |
| Paradigm biocapital advisors lp | 4.24M | 1.15% | $33.17M |
| Sofinnova investments | 2.19M | 0.61% | $9.90M |
| Soleus capital management | 349.98K | 0.10% | $1.58M |
| Nantahala capital management | 351.88K | 0.06% | $1.59M |
| Boothbay fund management | 693.69K | 0.06% | $3.13M |
| Polar capital | 1.79M | 0.04% | $8.07M |
| Quest partners | 27.14K | 0.03% | $212.47K |
| Rice hall james & associates | 109.60K | 0.03% | $494.31K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Caligan partners lp | 1.77M | 3.51% | 572.73K |
| Nantahala capital management | 351.88K | 0.06% | 351.88K |
| Stonepine capital management | 285.30K | 1.26% | 154.14K |
| Paradigm biocapital advisors lp | 4.24M | 1.15% | 150.00K |
| Renaissance | 131.60K | 0.00% | 103.70K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Logos global management lp | - | - | -1.00M |
| Pictet asset management sa | - | - | -441.93K |
| Cormorant asset management, lp | - | - | -425.00K |
| Wellington management group llp | - | - | -204.05K |
| D. e. shaw | 615.13K | 0.00% | -172.41K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Nantahala capital management | 351.88K | 0.06% | 351.88K | $1.59M |
| Susquehanna group, llp | 28.49K | - | 28.49K | $223.07K |
| Los angeles capital management | 10.28K | 0.00% | 10.28K | $46.38K |
| Raymond james financial | 7.70K | - | 7.70K | $34.73K |
| Allworth financial lp | 201.00 | - | 201.00 | $907.00 |
Sold Out
| Holder | Change |
|---|---|
| Capital performance advisors llp | -3.00 |
| Nelson, van denburg & campbell wealth management group | -8.00 |
| Allspring global investments | -8.00 |
| Parallel advisors | -18.00 |
| Us bancorp \de\ | -23.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 96 | -6.80% | 27,894,821 | -3.12% | 61 | 1.51% | 39 | -31.58% | 37 | 37.04% |
| Mar 31, 2025 | 103 | -8.85% | 28,762,925 | 0.03% | 63 | 1.54% | 58 | 1.75% | 27 | -12.90% |
| Dec 31, 2024 | 107 | -0.93% | 25,429,341 | -1.21% | 56 | 1.71% | 52 | -8.77% | 31 | 10.71% |
| Sep 30, 2024 | 108 | 11.34% | 25,741,820 | 5.70% | 57 | 1.88% | 57 | 11.76% | 28 | -20.00% |
| Jun 30, 2024 | 96 | -3.03% | 24,352,792 | 5.85% | 55 | 2.00% | 51 | 13.33% | 34 | -20.93% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| HBM Healthcare Investments AG Ord | 3.30M | 7.28% | - |
| Polar Capital Biotech S Inc | 1.78M | 3.94% | 283.80K |
| Vanguard US Total Market Shares ETF | 1.04M | 2.30% | - |
| Vanguard Total Stock Mkt Idx Inv | 1.02M | 2.24% | -22.45K |
| iShares Russell 2000 ETF | 844.39K | 1.86% | -16.07K |
| SPDR® S&P Biotech ETF | 438.23K | 0.97% | -2.67K |
| Pictet Biotech | 390.64K | 0.88% | 390.64K |
| Pictet-Biotech P USD | 385.84K | 0.85% | 3.99K |
| Fidelity Small Cap Index | 382.77K | 0.84% | -5.05K |
| Vanguard Institutional Extnd Mkt Idx Tr | 355.66K | 0.78% | -145.24K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Mar 07, 2025 | Rossi Michael J | PRESIDENT & CEO | Sell | $20.37K |
| Mar 07, 2025 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | $56.54K |
| Sep 13, 2024 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | $875.55K |
| Sep 16, 2024 | Gad Thomas | CHIEF BUSINESS OFFICER | Sell | $389.10K |
| Aug 28, 2024 | Lund-Hansen Torben | SVP & CHIEF TECHNICAL OFFICER | Sell | $768.50K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | - |
| 2025 Q1 | - | 2 |
| 2024 Q3 | - | 4 |
| 2024 Q2 | - | 7 |
| 2024 Q1 | - | 3 |
YMAB Ownership FAQ
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