X0206 3 2017-06-28 0 0001420565 AILERON THERAPEUTICS INC ALRN 0001112278 CVF, LLC 222 NORTH LASALLE STREET SUITE 2000 CHICAGO IL 60601 0 0 1 0 Series E-3 Preferred Stock Common Stock 443973 D Series F Preferred Stock Common Stock 92207 D The Series E-3 Preferred Stock is convertible into Common Stock on a 9.937-for-one basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares have no expiration date. The Series F Preferred Stock is convertible into Common Stock on a 9.937-for-one basis into the number of shares of Common Stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares have no expiration date. Richard H. Robb, manager of CVF, LLC, exercises voting and investment power with respect to shares held by CVF, LLC. Mr. Robb disclaims beneficial ownership of all shares held by CVF, LLC, except to the extent of his pecuniary interest therein. /s/ Richard H. Robb 2017-06-28