X0206 3 2021-08-05 0 0001832038 Adagio Therapeutics, Inc. ADGI 0001545672 Adimab, LLC 7 LUCENT DRIVE LEBANON NH 03766 0 0 1 0 Common Stock 1985295 D Series A Preferred Stock Common Stock 25000000 D Series B Preferred Stock Common Stock 220380 D Series C Preferred Stock Common Stock 640320 D Each share of Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock is convertible at any time at the option of the holder, without payment of additional consideration, into 5 shares of Common Stock, has no expiration date and is expected to automatically convert into shares of Common Stock immediately prior to the closing of the Issuer's initial public offering of its Common Stock. /s/ Philip Chase, General Counsel 2021-08-05