Companies / Day One Biopharmaceuticals, Inc. / Activity

Activity — Day One Biopharmaceuticals, Inc.

94 moves.

Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
InsidersInstitutions
DateActorActionSecurityValueShares ΔPosition afterImpact
Q2 2026
as of
BlackRock, Inc.
13F manager
ExitCommon stock$-82.37M-8.8M
-100.00%
0
high
Q1 2026
as of
AQR Arbitrage LLC
13F manager
NewCommon stock$52.79M+2.5M
2,462,154
2.38% of shares
high
Q2 2026
as of
State Street Corporation
13F manager
ExitCommon stock$-39.98M-4.3M
-100.00%
0
medium
Q1 2026
as of
Perceptive Advisors LLC
13F manager
NewCommon stock$37.64M+1.8M
1,755,799
1.70% of shares
medium
Q1 2026
as of
Soros Fund Management LLC
13F manager
NewCommon stock$33.00M+1.5M
1,539,100
1.49% of shares
medium
Q1 2026
as of
Balyasny Asset Management L.P.
13F manager
AddCommon stock$24.34M+1.1M
+76.20%
2,625,235
2.54% of shares
medium
Q1 2026
as of
Hudson Bay Capital Management LP
13F manager
TrimCommon stock$-22.08M-1.0M
-60.59%
670,000
0.65% of shares
medium
Q1 2026
as of
Water Island Capital LLC
13F manager
NewCommon stock$20.24M+944K
944,247
0.91% of shares
medium
Q1 2026
as of
Alpine Associates Management Inc.
13F manager
NewCommon stock$19.83M+925K
925,000
0.90% of shares
medium
Q2 2026
as of
AIGH Capital Management LLC
13F manager
ExitCommon stock$-18.57M-2.0M
-100.00%
0
medium
Q1 2026
as of
Magnetar Financial LLC
13F manager
NewCommon stock$13.83M+645K
645,173
0.62% of shares
medium
Q1 2026
as of
Polar Asset Management Partners Inc.
13F manager
NewCommon stock$13.52M+630K
630,410
0.61% of shares
medium
Q1 2026
as of
TIG Advisors, LLC
13F manager
NewCommon stock$13.16M+614K
613,918
0.59% of shares
medium
Q1 2026
as of
Millennium Management LLC
13F manager
AddCommon stock$12.38M+578K
+42.79%
1,927,557
1.87% of shares
medium
Q1 2026
as of
Janus Henderson Group PLC
13F manager
AddCommon stock$11.26M+525K
+2465.39%
546,428
0.53% of shares
medium
Q1 2026
as of
AllianceBernstein L.P.
13F manager
AddCommon stock$10.69M+1.1M
+1691.98%
1,214,783
1.18% of shares
medium
Q1 2026
as of
Gabelli Funds LLC
13F manager
NewCommon stock$9.95M+464K
464,097
0.45% of shares
medium
Q2 2025
as of
Boxer Capital Management, LLC
13F manager
ExitCommon stock$-9.44M-1.2M
-100.00%
0
medium
Q1 2026
as of
Mak Capital One LLC
13F manager
ExitCommon stock$-7.70M-826K
-100.00%
0
medium
Q1 2026
as of
Marshall Wace, LLP
13F manager
NewCommon stock$7.05M+329K
328,638
0.32% of shares
medium
Q1 2026
as of
Schroder Investment Management Group
13F manager
ExitCommon stock$-5.23M-570K
-100.00%
0
medium
Q1 2026
as of
Arrowstreet Capital, Limited Partnership
13F manager
TrimCommon stock$-5.14M-240K
-94.00%
15,294
0.01% of shares
medium
Q1 2026
as of
Public Sector Pension Investment Board
13F manager
NewCommon stock$5.06M+236K
236,000
0.23% of shares
medium
Q1 2026
as of
Credit Industriel Et Commercial
13F manager
NewCommon stock$2.90M+135K
135,420
0.13% of shares
low
Q1 2026
as of
BNP Paribas Financial Markets
13F manager
TrimCommon stock$-2.48M-116K
-25.49%
337,767
0.33% of shares
low
Q1 2026
as of
Rafferty Asset Management, LLC
13F manager
TrimCommon stock$-2.10M-98K
-62.29%
59,207
0.06% of shares
low
Q1 2024
as of
Barclays PLC
13F manager
TrimCommon stock$-1.96M-118K
-63.70%
67,466
0.07% of shares
low
Q1 2026
as of
Geode Capital Management, LLC
13F manager
AddCommon stock$1.65M+77K
+4.09%
1,954,735
1.89% of shares
low
Q1 2026
as of
Harvest Management LLC
13F manager
NewCommon stock$1.61M+75K
75,000
0.07% of shares
low
Q1 2026
as of
Norges Bank
13F manager
ExitCommon stock$-1.58M-169K
-100.00%
0
low
Q2 2025
as of
Barclays PLC
13F manager
AddCommon stock$1.25M+193K
+124.28%
348,109
0.34% of shares
low
Q1 2026
as of
Prelude Capital Management, LLC
13F manager
NewCommon stock$1.22M+57K
56,673
0.05% of shares
low
Q2 2026
as of
Timothy G. Youngquist 2020 Irrevocable Trust
13F manager
ExitCommon stock$-1.14M-53K
-100.00%
0
low
Q1 2026
as of
Timothy G. Youngquist 2020 Irrevocable Trust
13F manager
NewCommon stock$1.14M+53K
53,399
0.05% of shares
low
Q3 2024
as of
Barclays PLC
13F manager
AddCommon stock$1.11M+80K
+143.50%
135,373
0.13% of shares
low
Q1 2026
as of
Nomura Holdings Inc
13F manager
ExitCommon stock$-1.07M-115K
-100.00%
0
low
Q4 2025
as of
Bank of America Corp /De
13F manager
TrimCommon stock$-1.01M-108K
-9.06%
1,083,818
1.05% of shares
low
Q1 2026
as of
Blackstone Inc
13F manager
NewCommon stock$891.2K+42K
41,567
0.04% of shares
low
Q1 2026
as of
Two Sigma Investments, LP
13F manager
NewCommon stock$889.8K+42K
41,500
0.04% of shares
low
Q2 2023
as of
Barclays PLC
13F manager
AddCommon stock$845.8K+71K
+96.28%
144,403
0.14% of shares
low
Q4 2023
as of
Barclays PLC
13F manager
AddCommon stock$787.8K+54K
+40.91%
185,839
0.18% of shares
low
Q1 2026
as of
Los Angeles Capital Management LLC
13F manager
ExitCommon stock$-706.2K-100K
-100.00%
0
low
Q1 2026
as of
Twin Securities, Inc.
13F manager
NewCommon stock$678.1K+32K
31,626
0.03% of shares
low
Q1 2026
as of
Profund Advisors LLC
13F manager
TrimCommon stock$-662.9K-31K
-53.19%
27,210
0.03% of shares
low
Q1 2026
as of
Commonwealth of Pennsylvania Public School Empls Retrmt Sys
13F manager
NewCommon stock$568.2K+27K
26,500
0.03% of shares
low
Q2 2026
as of
Deutsche Bank AG
13F manager
ExitCommon stock$-531.3K-57K
-100.00%
0
low
Q1 2026
as of
Css LLC/IL
13F manager
NewCommon stock$514.6K+24K
24,000
0.02% of shares
low
Q4 2025
as of
Barclays PLC
13F manager
TrimCommon stock$-511.3K-55K
-15.80%
292,325
0.28% of shares
low
Q1 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-481.1K-36K
-32.85%
73,569
0.07% of shares
low
Q1 2026
as of
Graham Capital Management, L.P.
13F manager
ExitCommon stock$-469.3K-50K
-100.00%
0
low
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