Companies / Day One Biopharmaceuticals, Inc.

Day One Biopharmaceuticals, Inc.

DAWNCIK 1845337BRISBANE, CA

Financials · FY2025

Revenue$158.18M
Net income$-107.32B
Total debt—
Cash$197.08M
Diluted EPS$-1.04
Shares outstanding103.3M

Ownership

103.3M shares outstanding · as of Apr 15, 2026
0.57%Insiders
Ownership
Insiders0.57%589,322
10%+ / strategic10.97%11,332,398
Institutions86.65%89,537,646
Public float1.81%1,874,803

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 9

View all →
Insider% of sharesShares
York Charles N IICOO and CFO
0.30%312,025
Bender JeremyCEOCHIEF EXECUTIVE OFFICER · Director
0.20%204,603
Dubow AdamGen Counsel & Secretary
0.07%72,694
Merendino LaurenFormerChief Commercial Officer
0.06%60,157
Vasconcelles MichaelFormerHead of Research and Dev.
<0.01%4,397
AI Day1 LLC10% owner
0.00%0
Access Industries Holdings LLC10% owner
——
Access Industries Management, LLC10% owner
——
Blavatnik Len10% owner
——

Institutional holders 207

View all →
HolderValue% of shares
BlackRock, Inc.$82.37M8.55%
Deerfield Management Company, L.P.$79.82M3.60%
Atlas Venture Life Science Advisors, LLC$59.77M6.21%
Vanguard Group Inc$58.55M6.08%
Balyasny Asset Management L.P.$56.29M2.54%
Fmr LLC$53.28M5.53%
AQR Arbitrage LLC$52.79M2.38%
Vestal Point Capital, LP$48.46M5.03%
Geode Capital Management, LLC$41.92M1.89%
Millennium Management LLC$41.33M1.87%

Activity

View all →
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Feb 17, 2026Bender Jeremy
CEO
SellCommon Stock$179.3K-15K
-7.02%
204,603
0.20% of shares
medium
Feb 17, 2026Dubow Adam
Executive
SellCommon Stock$74.2K-6K
-8.09%
72,694
0.07% of shares
low
Feb 17, 2026York Charles N II
Executive
SellCommon Stock$70.4K-6K
-1.91%
312,025
0.30% of shares
low
Feb 17, 2026Merendino Lauren
Executive
SellCommon Stock$67.4K-6K
-8.81%
60,157
0.06% of shares
low
Feb 17, 2026Vasconcelles Michael
Executive
SellCommon Stock$31.6K-3K
-38.29%
4,397
<0.01% of shares
low
Apr 23, 2026AI Day1 LLC
10% owner
OtherPre-Funded Warrant (right to buy)—-828K
-100.00%
0
0.00% of shares
low
Feb 15, 2026Bender Jeremy
CEO
ExerciseRestricted Stock Unit (RSU)—-15K
-6.25%
222,188
0.22% of shares
low
Feb 15, 2026Bender Jeremy
CEO
ExerciseRestricted Stock Unit (RSU)—-12K
-8.33%
128,565
0.12% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
Glazer Capital, LLCPassive13G—5,615,390—
Fmr LLCPassive13G/A—5,717,008—
Vestal Point Capital, LPPassive13G———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
DAWN——23954D109—