SCHEDULE 13G 0002006045 XXXXXXXX LIVE Common Stock 09/30/2025 0001733294 Generation Bio Co. 37148k209 301 BINNEY STREET CAMBRIDGE MA 02142 SymBiosis Capital Partners, LLC DE 421926.00 0.00 421926.00 0.00 421926.00 6.3 IA Generation Bio Co. 301 BINNEY STREET, CAMBRIDGE, MASSACHUSETTS, 02142. SymBiosis Capital Partners, LLC 609 SW 8TH STREET, SUITE 510 BENTONVILLE, AR 72712 Delaware N IA 421,926 6.3 421,926 0 421,926 0 Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. SymBiosis Capital Partners, LLC /s/ Chidozie Ugwumba 11/14/2025