X0206 3 2022-06-08 0 0001854270 Senti Biosciences, Inc.\ SNTI 0001629794 New Enterprise Associates 15, L.P. 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 21093 0 0 1 0 0001640031 NEA Partners 15, L.P. 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 0 0 1 0 0001640033 NEA 15 GP, LLC 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 21093 0 0 1 0 0001277631 BASKETT FOREST 529 ALMANOR AVENUE SUNNYVALE CA 94085 0 0 1 0 0001559827 Florence Anthony A. Jr. 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 0 0 1 0 0001237289 SANDELL SCOTT D 1119 ST PAUL STREET BALTIMORE MD 21202 0 0 1 0 0001630226 Makhzoumi Mohamad 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 0 0 1 0 0001559807 Sonsini Peter W. 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 0 0 1 0 Common Stock 4426151 D Earnout Rights (Common Stock) Common Stock 137117 D Earnout Rights (Common Stock) Common Stock 137117 D The shares are directly held by New Enterprise Associates 15, L.P. ("NEA 15") and are indirectly held by NEA Partners 15, L.P. ("NEA Partners 15"), the sole general partner of NEA 15, NEA 15 GP, LLC ("NEA 15 GP"), the sole general partner of NEA Partners 15, and the individual managers of NEA 15 GP (NEA Partners 15, NEA 15 GP and the individual managers of NEA 15 GP (collectively, the "Managers") together, the "Indirect Reporting Persons"). The Managers are Forest Baskett, Anthony A. Florence, Jr., Mohamad Makhzoumi, Scott D. Sandell and Peter W. Sonsini. The Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 15 in which the Indirect Reporting Persons have no pecuniary interest. Each earnout right represents a contingent right to receive one share of the Issuer's Common Stock. The earnout rights vest, if on or before the date which is two (2) calendar years after June 8, 2022, the volume weighted average price of shares of the Issuer's Common Stock ("VWAP"), is greater than or equal to fifteen dollars ($15.00) over any twenty (20) trading days within any consecutive thirty (30) trading day period. If the target VWAP is not achieved during such period, the earnout rights will be forfeited. Each earnout right represents a contingent right to receive one share of the Issuer's Common Stock. The earnout rights vest, if on or before the date which is three (3) calendar years after June 8, 2022, the VWAP is greater than or equal to twenty dollars ($20.00) over any twenty (20) trading days within any consecutive thirty (30) trading day period. If the target VWAP is not achieved during such period, the earnout rights will be forfeited. /s/ Louis Citron, attorney-in-fact 2022-06-15