Company: DAWN
Filing Date: 2025-04-11
Form Type: DEF 14A
Source: 0001140361-25-013462
Chunk: 40

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-04-11
Form: DEF 14A
Chunk 40
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 filed with the SEC on November 14, 2024. Of the total 6,430,257 shares beneficially owned, (i) Atlas Venture Fund XI, L.P. (“Atlas XI”) holds 4,806,826 shares directly, (ii) Atlas Venture Associates XI, L.P. (“AVA XI LP”) holds 62,855 shares directly, (iii) Atlas Venture Opportunity Fund I, L.P. (“AVO I”) holds 793,116 shares directly, (iv) Atlas Venture Associates Opportunity I, L.P. (“AVAO LP”) holds 793 shares directly, and (v) Atlas Venture Opportunity Fund II, L.P (“AVO II”) holds 766,667 shares directly. |

Atlas Venture Associates XI, L.P. (“AVA XI LP”) is the general partner of Atlas XI and Atlas Venture Associates XI, LLC (“AVA XI LLC” and together with Atlas XI and AVA XI LP, the “Fund XI Reporting Persons”) is the general partner of AVA XI LP. Each of AVA XI LP and AVA XI LLC has voting and dispositive power over the shares held by Atlas XI. As such, each of the Fund XI Reporting Persons share voting and dispositive power with respect to the shares held by Atlas XI. Atlas Venture Associates Opportunity I, L.P. (“AVAO LP’) is the general partner of AVO I and Atlas Venture Associates Opportunity I, LLC (“AVAO LLC”) is the general partner of Atlas Venture Associates Opportunity I, L.P. (“AVAO LP”). Each of AVO I, AVAO LP and AVAO LLC has shared voting and dispositive power over the shares held by AVO I. As such, each of the Opportunity Fund Reporting Persons share voting and dispositive power with respect to the shares held by AVO I. Atlas Venture Associates Opportunity II, L.P. (“AVAO II LP”) is the general partner of AVO II and Atlas Venture Associates Opportunity II, LLC (“AVAO II LLC”) is the general partner of AVAO II LP. Each of AVO II, AVAO II LP and AVAO II LLC has shared voting and dispositive power over the shares held by AVO II. As such, each of the Opportunity Fund II Reporting Persons share voting and dispositive power with respect to the shares held by AVO II. The business address and principal executive offices of each of Atlas XI, AVO I and AVO II is 300 Technology Square, 8 thFloor, Cambridge, MA