Day One Biopharmaceuticals, Inc. Common Stock 23954D109 41796671 6430257 SH SOLE 6430257 0 0 Disc Medicine, Inc. Common Stock 254604101 126280790 2384456 SH SOLE 2384456 0 0 Dyne Therapeutics, Inc. Common Stock 26818M108 86922027 9130465 SH SOLE 9130465 0 0 Generation Bio, Co. Common Stock 37148K100 2650263 8279484 SH SOLE 8279484 0 0 Ikena Oncology, Inc. Common Stock 45175G108 6724359 5018178 SH SOLE 5018178 0 0 Korro Bio, Inc. Common Stock 500946108 14202991 1137149 SH SOLE 1137149 0 0 Kymera Therapeutics, Inc. Common Stock 501575104 213681602 4896462 SH SOLE 4896462 0 0 Q32 Bio, Inc. Common Stock 746964105 3117238 2092106 SH SOLE 2092106 0 0 Sionna Therapeutics, Inc. Common Stock 829401108 64091247 3694020 SH SOLE 3694020 0 0 Third Harmonic Bio, Inc. Common Stock 88427A107 56484413 10402286 SH SOLE 10402286 0 0 Vigil Neuroscience, Inc. Common Stock 92673K108 46403148 5836874 SH SOLE 5836874 0 0