DOSSIER · 13F Holders · Q1 2026Healthcare · Pharmaceutical Preparations
DAWN

DAY ONE BIOPHARMACEUTICALS I

30 institutions still hold DAY ONE BIOPHARMACEUTICALS I as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 23954D109·Pharmaceutical Preparations·30 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$268M
visible holders
Holders
30
filers reporting
Concentration
37.48%
GLAZER CAPITAL, LLC #1
top holder share
AI Holders Summary · Q1 2026

30 institutions reported DAWN in Q1 2026. GLAZER CAPITAL, LLC leads at 37.5% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
GLAZER CAPITAL, LLC
CIK 0001076809
$100M4.7M2.13%Q1 2026
02
PERCEPTIVE ADVISORS LLC
CIK 0001224962
$38M1.8M0.74%Q1 2026
03
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 0001009258
$35M3.7M0.44%Q4 2025
04
SOROS FUND MANAGEMENT LLC
CIK 0001029160
$33M1.5M0.36%Q1 2026
05
TIG Advisors, LLC
CIK 0001358253
$13M614K0.61%Q1 2026
06
JANUS HENDERSON GROUP PLC
CIK 0001274173
$12M546K0.01%Q1 2026
07
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$11M1.2M0.00%Q1 2026
08
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$11M506K0.00%Q1 2026
09
HRT FINANCIAL LP
CIK 0001475597
$4M451K0.01%Q4 2025
10
SG Americas Securities, LLC
CIK 0001313360
$3M123K0.00%Q1 2026
11
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$3M119K0.00%Q1 2026
12
Mint Tower Capital Management B.V.
CIK 0001666606
$1M60K0.12%Q1 2026
13
ORACLE INVESTMENT MANAGEMENT INC
CIK 0001012622
$932K100K0.56%Q4 2025
14
Point72 Asset Management, L.P.
CIK 0001603466
$685K32K0.00%Q1 2026
15
Twin Securities, Inc.
CIK 0001351351
$678K32K0.33%Q1 2026
16
Engineers Gate Manager LP
CIK 0001620220
$624K29K0.01%Q1 2026
17
CWM, LLC
CIK 0001535847
$537K25K0.00%Q1 2026
18
Jain Global LLC
CIK 0002024579
$393K18K0.00%Q1 2026
19
AlphaQuest LLC
CIK 0001883897
$329K35K0.02%Q4 2025
20
Kodai Capital Management LP
CIK 0001999612
$275K35K0.01%Q1 2025
Page 1 of 2
10 more holders available. Log in →
Insiders at DAY ONE BIOPHARMACEUTICALS I
Bender JeremyMerendino LaurenJosey John A.Dubow AdamVasconcelles Michael