Exhibit 10.12

Summary of BSA Plans

Share warrants, or BSAs, entitle a holder to exercise the warrant for the underlying vested shares at an exercise price per share determined by our board of directors and at least equal to the fair market value of an ordinary share on the date of grant. In addition to any exercise price payable by a holder upon the exercise of any share warrant, share warrants need to be subscribed for at a price which is determined by the board of directors at the time of the grant.

Administration. Pursuant to delegations granted at our annual meeting, our board of directors determines the recipients, dates of grant and exercise price of share warrants, the number of share warrants to be granted and the terms and conditions of the share warrants, including the period of their exercisability and their vesting schedule. In its discretion, the board of directors has the authority to extend the exercise period of share warrants post-termination.

Underlying shares. The securities to which the warrants give rights are ordinary shares. Each BSA₂₀₁₂ and each BSA₂₀₁₄ gives the holder the right to purchase ten (10) ordinary shares. Each BSA₂₀₁₆ (for which 45,000 were granted on October 3, 2016 under the BSA_2016-1 Plan (the “BSA_2016-1”) and 15,000 were granted on January 8, 2017 under the BSA_2016-2 Plan (the “BSA_2016-2”, and together with the BSA_2016-1, the BSA₂₀₁₆) gives the holder the right to purchase one (1) ordinary share.

Allocation. Our share warrants are generally granted to executive officers, directors or employees of our company. However, our BSA₂₀₁₄ and the underlying ordinary shares are reserved for our Chief Medical Officer and our BSA₂₀₁₆ and the underlying ordinary shares are reserved to our directors.

Standard terms. The BSA₂₀₁₂ share warrants granted by us become immediately exercisable (i) in the case of a definitive initial offering of the company to a market, whether regulated or unregulated, French, European or foreign or (ii) up to four (4) times per year and for the exercise of a minimum of fifty (50) shares. BSA₂₀₁₂ share warrant holders shall only be able to exercise the entirety of their warrants, already subscribed or allocated but not yet subscribed, in the event that one of the following operations occurs: (i) acceptance, by shareholders representing at least 66.67% of the shares constituting the share capital of our company, of a firm, definitive buyback offer pertaining to control of the company (as pursuant to Article L. 233-3 of the French Commercial Code), or (ii) the formation of a merger agreement providing for absorption of the company.

The conditions of exercise of our BSA₂₀₁₄ share warrants are as follows: the BSA₂₀₁₄ share warrants can be exercised (i) on one single occasion, or except in the event of an M&A operation, up to four (4) times per year, and (ii) for the exercise of a minimum of fifty (50) shares. In the event of a so-called M&A operation, holders of BSA₂₀₁₄ share warrants shall have five (5) business days starting from notice by the company of the occurrence of such an event to exercise all of their BSA₂₀₁₄ share warrants. However, the exercise of the BSA₂₀₁₄ share warrants may be cancelled in the event of the ultimate non-performance of the takeover or the merger operation, for any reason whatsoever.

The BSA₂₀₁₆ share warrants can be exercised on one single occasion. In the event of an M&A operation, holders of BSA₂₀₁₆ share warrants shall have fifteen (15) days starting from notice by the company of the occurrence of such event to exercise all of their BSA₂₀₁₆ share warrants.

Vesting period. The vesting period for BSA₂₀₁₂ occurs from May to July 2012, 2013, 2014 and 2015. One-third of the BSA₂₀₁₄ was vested during the second quarter of 2015 and two-thirds were vested during the second quarter of 2016.

The vesting period for the BSA_2016-1 occurs for half of the BSA_2016-1 on October 4, 2017 and for the remainder on October 4, 2018.

The vesting period for the BSA_2016-2 occurs for one-third on January 8, 2018, one-third on January 8, 2019 and for the remainder on January 8, 2020.

Final date for exercising share warrants. The BSA₂₀₁₂ will expire on May 20, 2020, the BSA₂₀₁₄ will expire on January 22, 2024, the BSA_2016-1 will expire on October 3, 2021, and the BSA_2016-2 will expire on January 8, 2022.