Day One Biopharmaceuticals Ownership | Who Owns Day One Biopharmaceuticals?
Day One Biopharmaceuticals Ownership Summary
Day One Biopharmaceuticals is owned by 59.23% institutional investors, 16.94% insiders, and 23.83% retail investors. Fmr is the largest institutional shareholder, holding 9.80% of DAWN shares. State Street® SPDR® S&P® Biotech ETF is the top mutual fund, with 2.61% of its assets in Day One Biopharmaceuticals shares.
DAWN Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Day One Biopharmaceuticals | 59.23% | 16.94% | 23.83% |
| Sector | Healthcare Stocks | 232.63% | 10.66% | -143.29% |
| Industry | Biotech Stocks | 382.12% | 10.42% | -292.54% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Fmr | 10.10M | 9.80% | $71.19M |
| Blackrock funding, inc. /de | 8.84M | 8.55% | $82.37M |
| Atlas venture life science advisors | 6.43M | 6.24% | $45.33M |
| Vanguard group | 6.28M | 6.08% | $58.55M |
| Blackrock | 4.53M | 5.23% | $62.47M |
| Deerfield management company, l.p. (series c) | 4.71M | 4.57% | $33.17M |
| State street | 3.24M | 3.14% | $22.85M |
| Pictet asset management sa | 2.99M | 2.89% | $27.87M |
| Vestal point capital, lp | 2.67M | 2.60% | $18.86M |
| Braidwell lp | 2.18M | 2.12% | $15.38M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Atlas venture life science advisors | 6.43M | 6.02% | $45.33M |
| Aigh capital management | 1.99M | 4.49% | $18.57M |
| Stonepine capital management | 647.38K | 3.71% | $4.56M |
| Dafna capital management | 999.16K | 1.74% | $7.04M |
| Lion point capital, lp | 42.00K | 1.68% | $296.10K |
| Mak capital one | 1.45M | 1.57% | $10.21M |
| Boxer capital | 1.19M | 0.86% | $16.40M |
| Vestal point capital, lp | 2.67M | 0.85% | $18.86M |
| Perkins capital management | 84.00K | 0.62% | $782.88K |
| Deerfield management company, l.p. (series c) | 4.71M | 0.51% | $33.17M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Mak capital one | 1.45M | 1.57% | 1.45M |
| Jefferies financial group | 1.12M | 0.05% | 1.12M |
| Deerfield management company, l.p. (series c) | 4.71M | 0.51% | 982.28K |
| Pictet asset management sa | 2.99M | 0.03% | 617.67K |
| Jane street group | 845.15K | 0.00% | 565.81K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ra capital management | - | - | -5.76M |
| Franklin resources | 52.73K | 0.00% | -3.42M |
| Rubric capital management lp | - | - | -3.38M |
| Estuary capital management lp | - | - | -3.33M |
| Fairmount funds management | - | - | -3.10M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Mak capital one | 1.45M | 1.57% | 1.45M | $10.21M |
| Jefferies financial group | 1.12M | 0.05% | 1.12M | $10.45M |
| Jump financial | 272.55K | 0.02% | 272.55K | $1.92M |
| Norges bank | 169.00K | 0.00% | 169.00K | $1.58M |
| Massachusetts financial services co /ma/ | 150.93K | 0.00% | 150.93K | $1.41M |
Sold Out
| Holder | Change |
|---|---|
| Nelson, van denburg & campbell wealth management group | -12.00 |
| Northwestern mutual wealth management | -14.00 |
| Geowealth management | -23.00 |
| C m bidwell & associates | -28.00 |
| Clearstead advisors | -39.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 159 | -7.56% | 61,236,176 | -28.40% | 59 | 0.86% | 91 | 1.11% | 37 | -33.93% |
| Sep 30, 2025 | 167 | -1.76% | 83,154,276 | 1.47% | 80 | 1.28% | 87 | -12.12% | 54 | 10.20% |
| Jun 30, 2025 | 178 | -6.32% | 86,133,514 | 0.67% | 83 | 1.20% | 101 | -6.48% | 52 | 10.64% |
| Mar 31, 2025 | 193 | 11.56% | 94,051,909 | 0.33% | 91 | 0.97% | 108 | 13.68% | 47 | 20.51% |
| Dec 31, 2024 | 170 | -3.41% | 93,046,512 | 1.26% | 96 | 1.06% | 93 | -8.82% | 40 | 8.11% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 2.69M | 2.61% | -14.49K |
| Vanguard US Total Market Shares ETF | 2.46M | 2.43% | 522.40K |
| Vanguard Total Stock Mkt Idx Inv | 2.41M | 2.33% | - |
| Polar Capital Biotech S Inc | 2.11M | 2.06% | - |
| Pictet-Biotech P USD | 1.91M | 1.85% | 575.67K |
| iShares Russell 2000 ETF | 1.88M | 1.82% | 1.39M |
| Franklin Small Cap Growth SMA | 1.61M | 1.59% | 1.61M |
| Franklin US Small Cap Growth Equity | 1.61M | 1.59% | 130.60K |
| Franklin Biotechnology Discv A(acc)USD | 1.55M | 1.52% | - |
| FIAM Small Cap Core Composite | 1.55M | 1.50% | 226.95K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Feb 17, 2026 | Merendino Lauren | Chief Commercial Officer | Sell | $67.45K |
| Feb 17, 2026 | Dubow Adam | Gen Counsel & Secretary | Sell | $74.19K |
| Feb 17, 2026 | York Charles N II | COO and CFO | Sell | $70.36K |
| Feb 17, 2026 | Bender Jeremy | CHIEF EXECUTIVE OFFICER | Sell | $179.34K |
| Feb 17, 2026 | VASCONCELLES MICHAEL | Head of Research and Dev. | Sell | $31.65K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 5 |
| 2025 Q4 | - | 4 |
| 2025 Q3 | - | 4 |
| 2025 Q2 | - | 4 |
| 2025 Q1 | - | 3 |
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