X0306 4 2022-01-19 0 0001659352 Codiak BioSciences, Inc. CDAK 0001774649 Konstantinov Konstantin C/O CODIAK BIOSCIENCES, INC. 35 CAMBRIDGEPARK DRIVE, SUITE 500 CAMBRIDGE MA 02140 0 1 0 0 Chief Technology Officer Stock Option (Right to Buy) 7.21 2022-01-19 4 A 0 42000 0.00 A 2032-01-18 Common Stock 42000 42000 D Restricted Stock Units 2022-01-19 4 A 0 8400 0.00 A Common Stock 8400 8400 D 25% of this option shall vest and become exercisable on January 19, 2023, with the remainder vesting in 12 equal quarterly installments thereafter. Each restricted stock unit represents a contingent right to receive one share of common stock. On January 19, 2022, the reporting person was granted 8,400 restricted stock units, vesting in three equal annual installments beginning on the first anniversary of the grant date. /s/ Yalonda Howze, Attorney-in-Fact for Konstantin Konstantinov 2022-01-21