X0508 4 2026-01-31 0001745999 Beam Therapeutics Inc. BEAM 0002033155 Cavanagh Bethany J C/O BEAM THERAPEUTICS INC., 238 MAIN STREET CAMBRIDGE MA 02142 false true false false SVP, Finance and Treasurer false Stock Option (Right to Buy) 27.62 2026-01-31 4 A false 40000 0 A 2036-01-31 Common Stock 40000 40000 D This stock option vests in equal monthly installments each month following the date of grant for the subsequent 48 months, subject to the Reporting Person's continued service with Beam Therapeutics Inc. through each vesting date. By: /s/ Christine Bellon, Attorney-in-fact 2026-02-02