X0508 4 2023-06-22 0001850079 Telesis Bio Inc. TBIO 0001866752 Nelson Todd Robert C/O TELESIS BIO INC. 10431 WATERIDGE CIRCLE, SUITE 150 SAN DIEGO CA 92121 true true true false Chief Executive Officer false Common Stock 2023-06-22 4 A false 47700 0 A 178996 D Common Stock 2024-03-01 4 F false 4756 0.528 D 174240 D Common Stock 6000000 I See footnote Common Stock 122516 I See footnote Stock Option (right to buy) 1.66 2023-06-22 4 A false 385500 0 A 2032-06-22 Common Stock 385500 385500 D The Reporting Person was granted restricted stock units ("RSUs"), which represent a contingent right to receive one share of Issuer's Common Stock for each RSU. Subject to the Reporting Person's continuing as a Service Provider (as defined in the Issuer's 2021 Stock Incentive Plan (the "Plan")) through each applicable vesting date, 25% of the RSUs shall vest on each of March 1, 2024, March 1, 2025, March 1, 2026, and March 1, 2027. Represents the number of shares withheld by the Issuer to satisfy the tax withholding obligation in connection with the vesting of RSUs. Shares held of record by GATTACA Mining LLC ("GATTACA"). The Reporting Person is the managing member of GATTACA and may be deemed to have voting and dispositive power over the shares held by GATTACA. Shares held of record by M-185 Corporation ("M-185"). The Reporting Person is the majority owner of M-185 and may be deemed to have voting and dispositive power over the shares held by M-185. Subject to the Reporting Person's continuing as a Service Provider (as defined in the Plan) through each applicable vesting date, twenty-five percent (25%) of the shares subject to the option shall vest on March 1, 2024, and one thirty-sixth (1/36th) of the remaining shares subject to the option shall vest each month thereafter. /s/ Rob Cutler, as Attorney-in-Fact 2024-03-05