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. Blackrock funding, inc. /de is the largest institutional shareholder, holding 6.81% of DAWN shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.43% 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 | 232.80% | 10.63% | -143.43% |
| Industry | Biotech Stocks | 379.48% | 10.37% | -289.85% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 7.04M | 6.81% | $151.03M |
| Vanguard group | 6.28M | 6.08% | $58.55M |
| Blackrock | 4.53M | 5.23% | $62.47M |
| Glazer capital | 4.68M | 4.53% | $100.42M |
| Fil | 4.13M | 4.00% | $88.59M |
| Deerfield management company, l.p. (series c) | 3.72M | 3.60% | $79.82M |
| Jpmorgan chase | 3.13M | 3.03% | $67.15M |
| State street | 2.87M | 2.78% | $61.53M |
| Balyasny asset management | 2.63M | 2.54% | $56.29M |
| Aqr arbitrage | 2.46M | 2.38% | $52.79M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Beryl capital management | 514.11K | 10.04% | $11.02M |
| Versor investments lp | 123.67K | 6.49% | $2.65M |
| Dafna capital management | 978.46K | 4.77% | $20.98M |
| Water island capital | 944.25K | 2.26% | $20.24M |
| Glazer capital | 4.68M | 2.13% | $100.42M |
| First trust capital management | 1.50M | 1.69% | $32.07M |
| Alpine associates management | 925.00K | 1.17% | $19.83M |
| Slotnik capital | 166.84K | 1.05% | $3.58M |
| Gabelli & co investment advisers | 325.35K | 1.03% | $6.98M |
| Deerfield management company, l.p. (series c) | 3.72M | 0.94% | $79.82M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Glazer capital | 4.68M | 2.13% | 4.68M |
| Fil | 4.13M | 0.07% | 4.13M |
| Jpmorgan chase | 3.13M | 0.00% | 3.09M |
| Aqr arbitrage | 2.46M | 0.87% | 2.46M |
| Ubs group | 2.31M | 0.01% | 2.13M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Atlas venture life science advisors | - | - | -6.41M |
| Ra capital management | - | - | -5.76M |
| Fmr | 23.64K | - | -5.69M |
| Vestal point capital, lp | - | - | -5.20M |
| Rubric capital management lp | - | - | -3.38M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Glazer capital | 4.68M | 2.13% | 4.68M | $100.42M |
| Fil | 4.13M | 0.07% | 4.13M | $88.59M |
| Aqr arbitrage | 2.46M | 0.87% | 2.46M | $52.79M |
| Perceptive advisors | 1.76M | 0.74% | 1.76M | $37.64M |
| Soros fund management | 1.54M | 0.36% | 1.54M | $33.00M |
Sold Out
| Holder | Change |
|---|---|
| Dunhill financial | -1.00 |
| 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 |
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 |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 2.46M | 2.43% | 522.40K |
| Vanguard Total Stock Mkt Idx Inv | 2.46M | 2.38% | 48.47K |
| Polar Capital Biotech S Inc | 2.11M | 2.06% | - |
| iShares Russell 2000 ETF | 1.90M | 1.84% | -15.51K |
| Pictet-Biotech P USD | 1.69M | 1.64% | 1.69M |
| Franklin US Small Cap Growth Equity | 1.61M | 1.59% | 130.60K |
| Franklin Small Cap Growth SMA | 1.61M | 1.59% | 1.61M |
| Franklin Biotechnology Discv A(acc)USD | 1.55M | 1.52% | - |
| Franklin Small Cap Growth Adv | 1.48M | 1.45% | - |
| Pictet Biotech | 1.37M | 1.40% | 1.37M |
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 Q2 | - | - |
| 2026 Q1 | - | 5 |
| 2025 Q4 | - | 4 |
| 2025 Q3 | - | 4 |
| 2025 Q2 | - | 4 |
DAWN Ownership FAQ
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