X0306 4 2018-07-30 0 0001341235 Aldeyra Therapeutics, Inc. ALDX 0001746541 Reed Joshua C/O ALDEYRA THERAPEUTICS, INC. 131 HARTWELL AVENUE, SUITE 320 LEXINGTON MA 02421 0 1 0 0 Chief Financial Officer Employee Stock Option (Right to Buy) 6.80 2018-07-30 4 A 0 75000 0.00 A 2028-07-29 Common Stock 75000 75000 D 25% of the shares subject to this option shall vest after one year of continuous service to the Issuer. The balance of the shares subject to this option shall vest in equal monthly installments over the next 36 months of continuous service to the Issuer following the vesting commencement date. /s/ Joshua Reed 2018-08-01