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Day One Biopharmaceuticals

184 hedge funds and large institutions have $746M invested in Day One Biopharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 42 funds opening new positions, 69 increasing their positions, 46 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

more funds holding in top 10

Funds holding in top 10:

0.15% less ownership

Funds ownership: 92.95%92.8% (-0.15%)

30% less call options, than puts

Call options by funds: $1.23M | Put options by funds: $1.76M

37% less capital invested

Capital invested by funds: $1.19B → $746M (-$442M)

Holders
184
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
2
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.23M
Puts
$1.76M
Net Calls
Net Calls Change

Top Buyers

1 +$17.2M
2 +$12.3M
3 +$9.18M
4
Millennium Management
Millennium Management
New York
+$8.95M
5
Goldman Sachs
Goldman Sachs
New York
+$8.7M

Top Sellers

1 -$39.3M
2 -$21.7M
3 -$12M
4
B
Braidwell
Connecticut
-$10.6M
5
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$10.4M
Name Holding Trade Value Shares
Change
Change in
Stake
101
$213K
102
$209K
103
$198K
104
$195K
105
$194K
106
$188K
107
$173K
108
$172K
109
$161K
110
$151K
111
$151K
112
$147K
113
$143K
114
$142K
115
$142K
116
$137K
117
$136K
118
$130K
119
$130K
120
$130K
121
$126K
122
$125K
123
$119K
124
$119K
125
$118K