PART I
EXPLANATORY NOTE
INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS
Pursuant to General Instruction E to FormS-8 under the Securities Act, this Registration Statement is filed by Aldeyra Therapeutics, Inc. (the “Company”) for the purposes of registering additional shares of Common Stock issuable under the Equity Incentive Plan and registering the shares of Common Stock initially issuable under the Purchase Plan.
The number of shares of Common Stock available for issuance under the Equity Incentive Plan is subject to an automatic annual increase on the first day of the Company’s calendar year equal to the lower of (a) 6% of the total number of shares of Common Stock outstanding on the last calendar day of the prior fiscal year, or (b) a number of shares of Common Stock determined by the Company’s board of directors (the “Equity Incentive Plan Evergreen Provision”). Accordingly, the number of shares of Common Stock available for issuance under the Equity Incentive Plan was increased by 1,574,666 shares effective January 1, 2019. This Registration Statement registers the 1,574,666 additional shares of Common Stock available for issuance under the Equity Incentive Plan as a result of the Equity Incentive Plan Evergreen Provision.
The number of shares of Common Stock available for purchase under the Purchase Plan is subject to an automatic annual increase on the first day of the Company’s calendar year equal to the lowest of (a) 1.0% of the total number of shares of Common Stock then issued and outstanding or (b) the number determined by the Company’s Board of Directors (the “Purchase Plan Evergreen Provision”). Accordingly, the number of shares of Common Stock available for purchase under the Purchase Plan was increased by 262,444 shares effective January 1, 2019. This Registration Statement registers the 262,444 additional shares of Common Stock available for purchase under the Purchase Plan as a result of the Purchase Plan Evergreen Provision.
Of the 5,335,959 shares currently authorized by the Equity Incentive Plan, (i) 1,000,000 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-224019) filed on March 29, 2018 (the “Sixth Registration Statement”), (ii) 880,343 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-217043) filed on March 30, 2017 (the “Fifth Registration Statement”), (iii) 700,000 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-213045) filed on August 10, 2016 (the “Fourth Registration Statement”), (iv) 333,333 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-210492) filed on March 30, 2016 (the “Third Registration Statement”), (v) 222,617 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-203076) filed on March 27, 2015 (the “Second Registration Statement”) and (vi) 625,000 have already been registered pursuant to the currently effective Registration Statement on FormS-8 (RegistrationNo. 333-196674) filed on June 11, 2014 (the “Original Registration Statement”). Of the 677,083 shares currently authorized by the Purchase Plan, (i) 191,376 have already been registered pursuant to the Sixth Registration Statement, (ii) 125,763 have already been registered pursuant to the Fifth Registration Statement and (iii) 97,500 have already been registered pursuant to the Fourth Registration Statement. The contents of the Sixth Registration Statement, Fifth Registration Statement, the Fourth Registration Statement, the Third Registration Statement, the Second Registration Statement and the Original Registration Statement, including any amendments thereto or filings incorporated therein, are incorporated herein by this reference. Any items in the Sixth Registration Statement, Fifth Registration Statement, the Fourth Registration Statement, the Third Registration Statement, the Second Registration Statement and the Original Registration Statement not expressly changed hereby shall be as set forth in the Sixth Registration Statement, Fifth Registration Statement, the Fourth Registration Statement, the Third Registration Statement, the Second Registration Statement and the Original Registration Statement, as applicable.