X0306 4 2020-03-02 0 0001341235 Aldeyra Therapeutics, Inc. ALDX 0001579179 Brady Todd C C/O ALDEYRA THERAPEUTICS, INC. 131 HARTWELL AVENUE LEXINGTON MA 02421 1 1 0 0 President and CEO Common Stock 2020-03-02 4 A 0 250000 0.00 A 902216 D Employee Stock Option (Right to Buy) 3.78 2020-03-02 4 A 0 250000 0.00 A 2030-03-01 Common Stock 250000 250000 D Bonus Units 3.78 2020-03-02 4 A 0 450865 0.00 A Common Stock 450865 450865 D Represents shares of common stock underlying a time-based restricted stock unit award (RSU). The RSU vests ratably in equal annual installments over a four-year period beginning on January 1, 2020, provided that the Reporting Person has provided continuous service to the Issuer through the applicable vesting date. The shares subject to this option shall vest in equal monthly installments over the next 48 months of continuous service to the Issuer after January 1, 2020. The bonus units vest in four (4) annual installments from the date of grant and entitle the Reporting Person to receive a cash payment, on the earlier of (i) four (4) years from the date of grant or (ii) a Change of Control of the Issuer (as defined in the grant documents), equal in value to the amount by which the then value of the Issuer's common stock exceeds the base value of $3.78. /s/ Todd C. Brady 2020-03-04