HOOKIPA Pharma Inc. (“HOOKIPA”) Rule 2.9 Announcement – Amendment

Core Points - HOOKIPA Pharma Inc. has amended its previous announcement regarding the potential combination with Poolbeg Pharma plc, specifically correcting the ISIN of its common stock [2][3] - The correct ISIN for HOOKIPA's common stock is US43906K2096, effective after a 1-for-10 reverse stock split on July 9, 2024 [3][4] - HOOKIPA currently has 9,655,022 shares of common stock issued, along with additional classes of stock including Class A common stock and various series of convertible preferred stock [4][5] Stock Structure - HOOKIPA has 2,399,517 shares of Class A common stock, which can be converted into common stock at a ratio of 10:1, subject to ownership limitations [5][6] - The company also has 370 shares of Series A convertible preferred stock, 10,800 shares of Series A-1 convertible preferred stock, and 15,268 shares of Series A-2 convertible preferred stock, each convertible into 100 shares of common stock [5][6] - HOOKIPA has granted 369,070 shares of common stock in the form of restricted stock units as part of its incentive plans [7]