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Filing Details

Accession Number:: 0001209191-22-038713
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2022-06-22 17:09:25
Reporting Period:: 2022-06-17

Accepted Time:: 2022-06-22 17:09:25
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1845337	Day One Biopharmaceuticals Inc.	DAWN	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1708269	Atlas Venture Fund Xi, L.p.	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1759241	Atlas Venture Opportunity Fund I, L.p.	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1780065	Atlas Venture Associates Opportunity I, L.p.	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1780066	Atlas Venture Associates Opportunity I, Llc	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1780067	Atlas Venture Associates Xi, Llc	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1780068	Atlas Venture Associates Xi, L.p.	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No
1885327	Atlas Venture Opportunity Fund Ii, L.p.	300 Technology Square, 8Th Floor Cambridge MA 02139	No	No	Yes	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2022-06-17	766,667	$15.00	766,667	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	7,210,242	Indirect	See footnote
Common Stock	15,714	Indirect	See footnote
Common Stock	991,396	Indirect	See footnote

Footnotes

The shares are held directly by Atlas Venture Opportunity Fund II, L.P. ("AVOF II"). The general partner of AVOF II is Atlas Venture Associates Opportunity II, L.P. ("AVAO II LP"). Atlas Venture Associates Opportunity II, LLC ("AVAO II LLC") is the general partner of AVAO II LP. Each of AVAO II LP and AVAO II LLC disclaims Section 16 beneficial ownership of the securities held by AVOF II, except to the extent of its pecuniary interest therein, if any.
The shares are held directly by Atlas Venture Fund XI, L.P. ("Atlas Venture Fund XI"). The general partner of Atlas Venture Fund XI is Atlas Venture Associates XI, L.P. ("AVA XI LP"). Atlas Venture Associates XI, LLC ("AVA XI LLC") is the general partner of AVA XI LP. Each of AVA XI LP and AVA XI LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund XI, except to the extent of its pecuniary interest therein, if any.
The shares are held directly by AVA XI LP. AVA XI LLC is the general partner of AVA XI LP. AVA XI LLC disclaims Section 16 beneficial ownership of the securities held by AVA XI LP, except to the extent of its pecuniary interest therein, if any.
The shares are held directly by Atlas Venture Opportunity Fund I, L.P. ("AVOF I"). The general partner of AVOF I is Atlas Venture Associates Opportunity I, L.P. ("AVAO I LP"). Atlas Venture Associates Opportunity I, LLC ("AVAO I LLC") is the general partner of AVAO I LP. Each of AVAO I LP and AVAO I LLC disclaims Section 16 beneficial ownership of the securities held by AVOF I, except to the extent of its pecuniary interest therein, if any.