0001415889-24-009146.txt : 20240326
0001415889-24-009146.hdr.sgml : 20240326
20240326180924
ACCESSION NUMBER: 0001415889-24-009146
CONFORMED SUBMISSION TYPE: 4
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20240325
FILED AS OF DATE: 20240326
DATE AS OF CHANGE: 20240326
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Blackman Samuel C.
CENTRAL INDEX KEY: 0001863676
ORGANIZATION NAME:
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40431
FILM NUMBER: 24785143
MAIL ADDRESS:
STREET 1: 395 OYSTER POINT BLVD.
STREET 2: SUITE 217
CITY: SOUTH SAN FRANCISCO
STATE: CA
ZIP: 94080
ISSUER:
COMPANY DATA:
COMPANY CONFORMED NAME: Day One Biopharmaceuticals, Inc.
CENTRAL INDEX KEY: 0001845337
STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834]
ORGANIZATION NAME: 03 Life Sciences
IRS NUMBER: 832415215
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
BUSINESS ADDRESS:
STREET 1: 2000 SIERRA POINT PARKWAY, SUITE 501
CITY: BRISBANE
STATE: CA
ZIP: 94005
BUSINESS PHONE: 650 484-0899
MAIL ADDRESS:
STREET 1: 2000 SIERRA POINT PARKWAY, SUITE 501
CITY: BRISBANE
STATE: CA
ZIP: 94005
FORMER COMPANY:
FORMER CONFORMED NAME: Day One Biopharmaceuticals Holding Co LLC
DATE OF NAME CHANGE: 20210209
4
1
form4-03262024_100315.xml
X0508
4
2024-03-25
0001845337
Day One Biopharmaceuticals, Inc.
DAWN
0001863676
Blackman Samuel C.
2000 SIERRA POINT PARKWAY, SUITE 501
BRISBANE
CA
94005
false
true
false
false
HEAD OF R&D
1
Common Stock
2024-03-25
4
S
0
10000
16.0055
D
1184662
D
Common Stock
1000000
I
See footnote
The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on October 10, 2023.
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.00 to $16.04 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
The Reporting Person is the sole manager, and has shared voting and dispositive power with his wife as members. The Reporting Person continues to report beneficial ownership of all of the Issuer's Common Stock held by the 2021 Blackman Family LLC but disclaims beneficial ownership except to the extent of his and his wife's pecuniary interest therein.
/s/ Charles N. York II, as Attorney-in-Fact
2024-03-26