Exercise of Option and Purchase of Shares. Each employee who continues to be a Participant in the Plan on the Exercise Date shall be deemed to have exercised his or her Option on such date and shall acquire from the Company such number of whole shares of Common Stock reserved for the purpose of the Plan as his or her accumulated payroll deductions on such date will purchase at the Option Price, subject to any other limitations contained in the Plan. Any amount remaining in a Participant’s account at the end of an Offering solely by reason of the inability to purchase a fractional share will be carried forward to the next Offering; any other balance remaining in a Participant’s account at the end of an Offering will be refunded to the Participant promptly.

Purchase Option. Provided that: (a) (i) no Event of Default shall have occurred and be continuing, and # Lessee has not defaulted in its rights pursuant to [Section 1 or 2] of this Exhibit C, then commencing on the first day of the tenth (10th) anniversary of the Effective Date and ending three (3) months thereafter, or (b) (i) Lessee has exercised the applicable Extension Option pursuant to the terms and provisions of this Lease, # no Event of Default shall have occurred and be continuing, and # Lessee has not defaulted in its rights pursuant to: # the purchase option in [clause (a) of this Section 3], or # [Section 1 or 2] of this Exhibit C, then during the period commencing on the first day of each extension term and ending three (3) months thereafter (each of [(a) or (b)], an “Option Period”), Lessee shall have the option to purchase Lessor’s Interest from Lessor at a price equal to the greater of: # fair market value (as determined by an appraisal conducted by an MAI designated appraiser mutually chosen by Lessor and Lessee, which appraisal shall assume the highest and best use of the Property and not just the Permitted Use) and # for the three (3) month period following the tenth (10th) anniversary of the Effective Date, one hundred twenty percent (120%), # during the first Extension Option one hundred thirty-five percent (135%), during the second Extension Option one hundred forty percent (140%), during the third Extension Option one hundred fifty percent (150%), and during the fourth Extension Option one hundred sixty percent (160%) of Lessor’s total investment in the Property (i.e., the sum of: # the original purchase price paid by the then lessor under this Lease, # any subsequent fundings advanced by Lessor to Lessee related to the Property, and # Lessee’s closing costs (the “Project Purchase Price”). Lessee shall exercise its rights hereunder by giving written notice to Lessor prior to the expiration of the Option Period (“Option Exercise Notice”). If Lessee delivers to Lessor an Option Exercise Notice, then Lessor and Lessee shall negotiate in good faith to enter into a purchase and sale agreement pursuant to which Lessor and Lessee shall consummate the purchase and sale of the Property on the date that is ninety (90) days after receipt by Lessor of the Option Exercise Notice for the Project Purchase Price, free and clear of all liens, pledges, security interests and other encumbrances (other than the Permitted Exceptions), and otherwise on the customary terms and conditions as are reasonably acceptable to Lessor and Lessee. Lessee shall be responsible for paying all costs in connection with the purchase and transfer of the Property, including, but not limited to, transfer costs and taxes, expenses of Lessor’s attorney fees, and any prepayment costs, penalties, or premiums, including, without limitation, all costs with respect to any defeasance (including the purchase of any securities) of any loan on the property, Lessor incurs to prepay any loan on the property in excess of the outstanding principal balance of the Lessor’s loan, if any. In the event that Lessee defaults in its obligation to close on the acquisition of the Property pursuant to this [Section 3] of this Exhibit C from Lessor if and when required to do so under this [Section 3] of this Exhibit C, Lessor, in addition to any other rights or remedies available at law or in equity, shall have the right to recover Lessor’s reasonable legal fees and other out of pocket expenses actually incurred in connection therewith. Additionally, if Lessee defaults in its obligation to purchase Lessor’s Interest if and when required to do so under this [Section 3] of this Exhibit C, then Lessee shall have no further rights and Lessor shall have no further obligations under this [Section 3] of this Exhibit C. Notwithstanding anything to the contrary, Lessee’s rights hereunder as to the Lessor’s Interest shall terminate and be null and void and of no further force and effect if this Lease terminates or upon Lessee’s purchase of Lessor’s Interest. In any such event, Lessee shall execute a quitclaim deed and/or such other documents as Lessor shall reasonably request evidencing the termination of Lessee’s right hereunder.

Exercise of Option. The Purchaser hereby elects to exercise the Option to purchase shares of Common Stock (“Shares”), all of which are vested pursuant to the terms of the Stock Option Agreement. The total Exercise Price for all of the Shares is (Total Shares times Exercise Price per Share).

Exercise of Option. I hereby elect to exercise the Option to purchase the following number of Shares, all of with are Vested Shares in accordance with the Notice and/or Option Agreement:

Exercise of Option. Effective as of today, the undersigned (“Employee”) hereby elects to exercise Employee’s option to purchase shares of the Common Stock (the “Shares”) of Protagonist Therapeutics, Inc. (the “Company”) under and pursuant to [[Organization A:Organization]]’s 2007 Stock Option and Incentive Plan (the “Plan”) and the Stock Option Agreement dated , (the “Option Agreement”). The purchase price for the Shares shall be $ as required by the Option Agreement. Employee herewith delivers to [[Organization A:Organization]] the full Exercise Price for the Shares.

The Company may exercise the Purchase Option by delivering or mailing to the Participant (or the Participant’s estate), within 180 days after the termination of the Service of the Participant, a written notice of exercise of the Purchase Option. Such notice shall specify the number of Shares to be purchased. If and to the extent the Purchase Option is not so exercised by the giving of such a notice within such 180-day period, the Purchase Option shall automatically expire and terminate effective upon the expiration of such180-day period.

Exercise of Option. Effective as of today, the undersigned ("Optionee") hereby elects to exercise Optionee's option to purchase ​ shares of the Common Stock (the "Shares") of Assembly Biosciences, Inc. (the "Company") under and pursuant to the Company's Amended and Restated 2014 Stock Incentive Plan, as amended (the "Plan") and the Notice of Stock Option Grant dated ​, 20​ with its attached Stock Option Agreement (the "Option Agreement"). The purchase price for the Shares shall be ​ as required by the Option Agreement. Optionee herewith delivers to the Company the full Exercise Price for the Shares.

Option Exercise Price. The exercise price per Share subject to each Option shall be set by the Administrator, but shall not be less than one hundred percent (100%) of the Fair Market Value of a Share on the date the Option is granted (or, as to Incentive Stock Options, on the date the Option is modified, extended or renewed for purposes of Section 424(h) of the Code). In addition, in the case of Incentive Stock Options granted to a Greater Than 10% Stockholder, such price shall not be less than one hundred ten percent (110%) of the Fair Market Value of a Share on the date the Option is granted (or the date the Option is modified, extended or renewed for purposes of Section 424(h) of the Code).

Exercise of Option. An Option shall be exercisable at such times and be subject to such restrictions and conditions as the Committee shall in each instance approve, which terms and restrictions need not be the same for each grant or for each Participant, except that no Option shall be exercisable within one (1) year from its Grant Date, except in the case of the death of the Participant.

Exercise of Option. Effective as of the Exercise Effective Date set forth in the signature page below, the undersigned individual (“Participant”) hereby elects to exercise Participant’s option (the “Option”) to purchase the number of shares of the Common Stock reflected in the signature page below (the “Shares”) of DatChat, Inc. (the “Company”) under and pursuant to, and be subject to the terms and conditions of, the 2021 Equity Incentive Plan (the “Plan”), the Stock Option Agreement and this Exercise Notice.