X0609 4 2026-06-03 0001754068 Kalaris Therapeutics, Inc. KLRS 0001277479 ADAMIS ANTHONY P false C/O KALARIS THERAPEUTICS, INC. 400 CONNELL DRIVE, SUITE 5500 BERKELEY HEIGHTS NJ 07922 true false false false false Stock Option (Right to Buy) 4.72 2026-06-03 4 A false 9000 0 A 2036-06-02 Common Stock 9000 9000 D The option was granted on June 3, 2026. The shares underlying the option are scheduled to vest in full on the earlier of (i) June 3, 2027 or (ii) the date of the Issuer's 2027 Annual Meeting of Stockholders, subject to continued service. /s/ Brett Hagen, Attorney-in-Fact 2026-06-04