ADDITIONAL INFORMATION 21 (b) Conditions governing the warrants granted by the Company of in any manner other than by wil l or by laws of descent or Share warrants for founders (BCE) distribution and may be exercised, during the lifetime of the Share warrants for founders entitle a holder to exercise the beneficiary, only by the beneficiary. warrant for the underlying vested shares at an exercise price per Share warrants (BSA) share determined by our Board of Directors and at least equal to Share warrants need to be subscribed for a price which is the fair market value of an ordinary share on the date of grant. determined by the board on the date of grant, in addition to any Share warrants for founders may only be issued by companies exercise price payable by a holder upon the exercise of any share meeting certain criteria, which we wil l not meet fol lowing the warrant. listing of our shares on Euronext Paris. Share warrants may not be transferred to any person subject to Share warrants for founders are not transferable and may not be certain exceptions detailed in our BSA plan. sold, pledged, assigned, hypothecated, transferred or disposed (c) Warrants holders The table below sets forth the warrants granted by us to our executive officers and directors as of the date of the registration of this Registration Document: Name Grant Date Type of Grant Number of Exercise Price Expiration Date Ordinary Shares (€) Underlying Awards (#)(1) Bernard Gilly 07/08/2013 BCE 300,000 0.025 07/07/2023 07/08/2015 BCE 161,000 3.275 07/07/2025 Didier Pruneau(2) 07/08/2013 BCE 96,000 0.025 07/07/2023 07/08/2015 BCE 16,000 3.275 07/07/2025 José-Alain Sahel 07/08/2013 BSA 280,000 0.025 07/07/2023 07/08/2015 BSA 48,000 3.275 07/07/2025 07/26/2016 BSA 120,000 8.08 07/25/2023 07/27/2017 BSA 80,000 5.04 07/26/2024 Peter Goodfellow 04/09/2014 BSA 33,000 0.025 04/08/2024 07/08/2015 BSA 7,000 3.275 07/07/2025 07/26/2016 BSA 7,000 8.08 07/25/2023 07/27/2017 BSA 10,000 5.04 07/26/2024 Thomas Gidoin 07/08/2015 BCE 160,000 3.275 07/07/2025 Michael Wyzga 07/08/2015 BSA 40,000 3.275 07/07/2025 07/26/2016 BSA 31,000 8.08 07/25/2023 07/27/2017 BSA 15,000 5.04 07/26/2024 Simone Seiter 07/27/2017 BSA 30,000 5.04 07/26/2024 Natalie Mount 07/27/2017 BSA 30,000 5.04 07/26/2024 Total 1,464,000 (1) Each BCE and BSA warrant entitles its holder to subscribe to one ordinary share, with a nominal value of €0.025 each, at an exercise price of €0.025, €3.275, €8.08, or €5.04 . (2) Didier Pruneau retired on February 27, 2018. GENSIGHT BIOLOGICS – 2017 Registration Document– 219