X0306 4/A 2017-07-05 2017-07-05 0 0001420565 AILERON THERAPEUTICS INC ALRN 0001709654 Kapnick Scott C/O AILERON THERAPEUTICS, INC. 281 ALBANY STREET CAMBRIDGE MA 02139 1 0 1 0 Common Stock 2017-07-05 4 P 0 66666 15.00 A 66666 I See Footnote The amount of securities previously reported as beneficially owned by the Reporting Person inadvertently aggregated shares that the Reporting Person indirectly beneficially owned with shares that the Reporting Person directly beneficially owned following the transaction reported on the original Form 4. The correct number of shares that the Reporting Person indirectly beneficially owned following this transaction was 66,666 shares. These shares are directly owned by Jake86 LLC, for which the Reporting Person serves as investment manager. The Reporting Person disclaims beneficial ownership of the shares held by Jake86 LLC, except to the extent of his indirect pecuniary interest therein. /s/ Donald Dougherty, attorney-in-fact for Scott B. Kapnick 2018-08-14