FINANCIAL INFORMATION CONCERNING THE GROUP’S ASSETS AND LIABILITIES, FINANCIAL POSITIONAND PROFITS AND LOSSES 20 Changes in the balances of BCE BCE 2013-02 BCE 2014-06 BCE 2015-06 Total Balance outstanding at January 1, 2017 780,478 60,000 733,298 1,573,776 Granted during the period — — — — Exercised during the period (656,758) — (71,764) (728,522) Forfeited during the period — — (141,951) (141,951) Balance outstanding at December 31, 2017 123,720 60,000 519,583 703,303 Of which exercisable 123,720 60,000 335,521 519,241 16.2 Non-employee warrants (BSA) • at the latest within 10 years from the date of grant. Vesting schedule BSA 2017 granted may be exercised by the beneficiary on the BSA 2013-02 and BSA 2015-06 granted may be exercised by the basis of the following vesting schedule: beneficiary on the basis of the following vesting schedule: • up to 1/4 on the date of the grant • up to 1/4 on the first anniversary of the date of grant; • the remaining 75% becoming exercisable up to 1/36 per month • the remaining 75% becoming exercisable up to 1/36 per month from the date of grant; and from the first anniversary of the date of grant; and • at the latest within 7 years from the date of grant. • at the latest within 10 years from the date of grant. BSA 2016 granted may be exercised by the beneficiary on the basis of the following vesting schedule: • up to 100% on the first anniversary of the date of grant; and BSA 2013-02 BSA 2013-02 BSA 2015-06 BSA 2016 BSA 2017 Date of grant July 8, 2013 April 9, 2014 July 8, 2015 July 26, 2016 July 27, 2017 Plan expiration date July 7, 2023 April 8, 2024 July 7, 2025 July 25, 2023 July 27, 2024 Number of warrants initially granted 328,000 33,000 121,000 205,000 165,000 Exercise price €0.025 €0.025 €3.275 €8.08 €5,04 Share entitlement per warrant 1 1 1 1 1 Valuation method Black & Scholes Expected volatility 42.50% 42.50% 76.49% 62.46% 49.37% Expected dividend 0.00% 0.00% 0.00% 0.00% 0.00% Subscription price per warrant €0.08 €0.08 €0.25 €0.65 €0.40 Fair value per warrant €0.36 €0.36 €5.31 €2.94 €1.64 (subscription price deducted) Changes in the balances of BSA BSA 2013-02 BSA 2015-06 BSA 2016 BSA 2017 Total Balance outstanding at January 1, 2017 293,040 121,000 205,000 — 619,040 Granted during the period — — — 165,000 165,000 Exercised during the period — — — — — Forfeited during the period — — (47,000) — (47,000) Balance outstanding at December 31, 2017 293,040 121,000 158,000 165,000 737,040 Of which exercisable 293,040 73,104 158,000 58,438 524,144 204– GENSIGHT BIOLOGICS – 2017 Registration Document