Unfunded Plan. Participants shall have no right, title, or interest whatsoever in or to any investments that the Company, and/or its Subsidiaries, and/or Affiliates may make to aid it in meeting its obligations under the Plan. Nothing contained in the Plan, and no action taken pursuant to its provisions, shall create or be construed to create a trust of any kind, or a fiduciary relationship between the Company and any Participant, beneficiary, legal representative, or any other person. To the extent that any person acquires a right to receive payments from the Company, and/or its Subsidiaries, and/or Affiliates under the Plan, such right shall be no greater than the right of an unsecured general creditor of the Company, a Subsidiary, or an Affiliate, as the case may be. All payments to be made hereunder shall be paid from the general funds of the Company, a Subsidiary, or an Affiliate, as the case may be and no special or separate fund shall be established and no segregation of assets shall be made to assure payment of such amounts except as expressly set forth in the Plan. The Plan is not subject to ERISA.

Neuren and ACADIA have agreed to an initial Development Plan with respect to the Development of the Compound for Rett syndrome in the Territory, including development tasks, timelines and a budget, an overview of which is set out in a schedule delivered by separate letter agreement of the parties.

On an annual basis, ACADIA shall prepare a Commercialization plan with respect to the Commercialization of each Product in the Field in the Territory pursuant to this Agreement (as may be amended by ACADIA, the “Commercialization Plan”). The Commercialization Plan for the first full year following commercial launch of the first Product for which an NDA is filed with the FDA will be provided to Neuren by ACADIA as soon as it is available but, in any event, no later than […​…] days after the filing of the NDA for such Product with the FDA. Such initial Commercialization Plan shall provide a reasonably detailed plan for ACADIA’s (or its Affiliate’s or Sub-Licensee’s) Commercialization activities with respect to such Product, including pre-launch plans and launch plans, pricing, label expansion and market positioning (which information may be preliminary). ACADIA may amend the Commercialization Plan from time to time in its discretion.

Plan Administration. The Administrative Committee appointed by the Board of Directors, or such other committee as may be appointed by the Board of Directors from time to time, shall serve as the Plan Administrator. The Plan Administrator is responsible for the general administration and management of this Plan and shall have all powers and duties necessary to fulfill its responsibilities, including, but not limited to, the discretion to interpret and apply this Plan and to determine all questions relating to eligibility for benefits. This Plan shall be interpreted in accordance with its terms and their intended meanings. However, the Plan Administrator and all plan fiduciaries shall have the discretion to interpret or construe ambiguous, unclear, or implied (but omitted) terms in any fashion they deem to be appropriate in their sole discretion, and to make any findings of fact needed in the administration of this Plan. The validity of any such interpretation, construction, decision, or finding of fact shall not be given de novo review if challenged in court, by arbitration, or in any other forum, and shall be upheld unless clearly arbitrary or capricious.

Plan Appendices. From time to time, the Company may adopt Appendices to the Plan for the purpose of setting forth specific provisions or providing documentation necessary to determine benefits under the Plan for certain Employee groups. Each such Appendix shall be attached to and form a part of the Plan. Each such Appendix shall specify the population to which it applies and shall supersede the provisions of the Plan document to the extent necessary to eliminate any inconsistencies between the Plan document and such Appendix.

Plan Administration. The Committee shall be responsible for administration of the Plan. The Committee is authorized to interpret the Plan, to prescribe, amend and rescind regulations relating to the Plan, and to make all other determinations necessary or advisable for the administration of the Plan, but only to the extent not contrary to the express provisions of the Plan, the Performance Bonus Plan and the Stock Incentive Plan. Determinations, interpretations or other actions made or taken by the Committee pursuant to the provisions of the Plan shall be final, binding and conclusive for all purposes and upon all Participants, Eligible Officers, Beneficiaries and all other persons who have or claim an interest herein. The Committee may, in its discretion, but only to the extent permitted by Section 162(m) of the Code (as applicable), delegate to one or more directors or employees of the Company any of the Committee’s authority under the Plan. The acts of any such delegates shall be treated under the Plan as acts of the Committee with respect to any matters so delegated, and any reference to the Committee in the Plan shall be deemed a reference to any such delegates with respect to any matters so delegated.

Unfunded Plan. Each Award Opportunity granted under the Plan represents only a contingent right to receive all or a portion of the number of Maximum Shares subject to the terms and conditions of the Award Agreement, the Plan, the Performance Bonus Plan and the Stock Incentive Plan. Nothing in the Plan shall be construed to create a trust or to establish or evidence any Participant’s claim of any right to payment of a Long-Term Incentive bonus other than as an unsecured general creditor with respect to any payment to which he or she may be entitled under the Plan.

Unfunded Plan. It is a condition of the Plan that neither a Participant nor any other person or entity shall look to any person or entity other than the Employer for the payment of benefits under the Plan. The Participant or any other person or entity having or claiming a right to payments hereunder shall rely solely on the unsecured obligation of the Employer set forth herein. Nothing in this Plan shall be construed to give the Participant or any other person or entity any right, title, interest, or claim in or to any specific asset, fund, reserve, account or property of any kind whatsoever, owned by the Company or any Employer or in which the Company or any Employer may have any right, title or interest now or in the future. However, the Participant or any other person or entity shall have the right to enforce his or its claim against the Employer in the same manner as any other unsecured creditor of such entity. Neither a Participant nor his Beneficiary shall have any rights in or against any specific assets of any System Company.

Plan Administration. The Plan shall be administered by the Global Compensation Department provided, however, that any action that can be taken by the Global Compensation Department hereunder can also be taken by the Committee, at its discretion. The Global Compensation Department shall have the discretionary authority to adopt, alter and repeal such administrative rules, guidelines and practices governing

​ = Certain confidential information contained in this document, marked by brackets, has been omitted and filed separately with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended.