X0508 4 2023-05-17 0 0000861838 Aceragen, Inc. ACGN 0001534428 Pillar Invest Corp C/O STUARTS CORPORATE SERVICES LTD. KENSINGTON HOUSE, 69 DR. ROY'S DRIVE GEORGETOWN, GRAND CAYMAN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0001783583 Pillar Partners Foundation, L.P. C/O STUARTS CORPORATE SERVICES LTD. KENSINGTON HOUSE, 69 DR. ROY'S DRIVE GEORGETOWN, GRAND CAYMAN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0001783584 Pillar Pharmaceuticals 6, L.P. C/O STUARTS CORPORATE SERVICES LTD. KENSINGTON HOUSE, 69 DR. ROY'S DRIVE GEORGETOWN, GRAND CAYMAN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0001783582 Umari Abude C/O STUARTS CORPORATE SERVICES LTD. KENSINGTON HOUSE, 69 DR. ROY'S DRIVE GEORGETOWN, GRAND CAYMAN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0001193366 ZEIN YOUSSEF EL C/O STUARTS CORPORATE SERVICES LTD. KENSINGTON HOUSE, 69 DR. ROY'S DRIVE GEORGETOWN, GRAND CAYMAN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0 Common Stock 2023-05-17 4 P 0 26965 1.42 A 170712 I By Abude Umari See Footnote Common Stock 355247 I By Pillar Partners Foundation, L.P. See Footnote Common Stock 135540 I By Pillar Pharmaceuticals 6, L.P. See Footnote Common Stock 1547 I By Youssef El Zein See Footnote Pillar Invest Corporation ("Pillar GP") is the general partner of Pillar Pharmaceuticals 6, L.P. ("Pillar 6") and Pillar Partners Foundation, L.P. ("Pillar Partners", together with Pillar GP and Pillar 6, the "Pillar Funds"). Youssef El Zein and Abude Umari are directors of Pillar GP. Each of Pillar GP, Mr. El Zein and Mr. Umari disclaims Section 16 beneficial ownership of the securities beneficially owned by the Pillar Funds and this report shall not be deemed an admission that any of Pillar GP, Mr. El Zein or Mr. Umari is the Section 16 beneficial owner of any such securities, except to the extent of its or his pecuniary interest therein, if any, by virtue of its or his ownership interest in the Pillar Funds or Pillar GP, as applicable. Pillar Invest Corporation, /s/ Youssef El Zein, Authorized Person 2023-07-19 Pillar Partners Foundation, L.P., /s/ Youssef El Zein, Authorized Person 2023-07-19 Pillar Pharmaceuticals, 6, L.P., /s/ Youssef El Zein, Authorized Person 2023-07-19 /s/ Abude Umari 2023-07-19 /s/ Youssef El Zein 2023-07-19