X0609 4 2026-09-24 0001745999 Beam Therapeutics Inc. BEAM 0001786322 Ciaramella Giuseppe false C/O BEAM THERAPEUTICS INC., 238 MAIN STREET CAMBRIDGE MA 02142 false true false false President false Common Stock 2026-09-24 4 G false 123407 0.00 D 130504 D Common Stock 123407 I By spousal trust On September 24, 2026, the reporting person contributed 123,407 shares of BEAM common stock to the Giuseppe Ciaramella Irrevocable Trust - 2026, of which the reporting person's spouse is trustee. The beneficiaries of the trust are the reporting person's spouse and children. The reporting person disclaims beneficial ownership of the securities held by the trust. By: /s/ Christine Bellon, Attorney-in-fact 2026-09-25