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. This Option may be exercised in whole or in part at any time or times prior to its expiration; provided that the first exercise of this Option shall not occur before the fourth anniversary of the date on which the Option was granted. Notwithstanding the foregoing, if the Participant’s employment with the Corporation or a Subsidiary Company is terminated by reason of the Participant’s Retirement or death before the fourth anniversary of the date on which the Option was granted, the Participant (or, in the case of death, the Participant’s Beneficiary) may first exercise this Option on the later of the first anniversary of the date on which this Option was granted or the effective date of the Participant’s Retirement or death. Notice of the exercise of all or any part of this Option shall be given in the manner prescribed by the Secretary of the Corporation. Such notice shall be irrevocable, shall specify the number of shares to be purchased and the purchase price to be paid therefore, and must be accompanied by the payment of the purchase price as provided in paragraph 3(c) herein. Upon the exercise of such Option, the Common Stock purchased will be distributed.

Exercise of Option. The times, circumstances and conditions under which an Option shall be exercisable shall be determined by the Committee in its sole discretion and set forth in the Award Agreement. Unless otherwise determined by the Committee and set forth in the Award Agreement, each Option granted to an Employee for an eight-year term shall vest and become exercisable as to ten (10%) percent of the Shares covered thereby on the third anniversary of Continuous Service after the Grant Date, as to twenty (20%) percent of the Shares covered thereby on the fourth anniversary of Continuous Service after the Grant Date, as to twenty (20%) percent of the Shares covered thereby on the fifth anniversary of Continuous Service after the Grant Date, as to twenty-five (25%) percent of the Shares covered thereby on the sixth anniversary of Continuous Service after the Grant Date, as to fifteen (15%) percent of the Shares covered thereby on the seventh anniversary of Continuous Service after the Grant Date, and as to ten (10%) percent of the Shares covered thereby on the eighth anniversary of Continuous Service after the Grant Date. Each Option granted for a five-year term shall vest and become exercisable at such time or times as shall be determined by the Committee and set forth in the Award Agreement. The Committee shall have the discretion to determine whether and to what extent the vesting of Options shall be tolled during any unpaid leave of absence; provided, however, that in the absence of such determination, vesting of Options shall be tolled during any such leave approved by the Company.

Exercise of Option. Landlord will give notice to Tenant (an “Offering Notice”) setting forth Landlord’s intent to construct the Station 5 Building and to make the Station 5 Building available for lease. The Offering Notice shall include # the rentable square footage of the Station 5 Building that Landlord intends to construct, for which rentable square footage Landlord shall have obtained approvals through the Site Plan and Architectural Review process of the City of San Mateo, # the six-month time period during which Landlord anticipates completing the base building improvements of the Station 5 Building and delivering possession thereof for completion of tenant improvements, and # a copy of the building plans for the Station 5 Building. Tenant shall exercise the Expansion Option, if at all, by giving Landlord unconditional, irrevocable written notice of such election (the “Expansion Exercise Notice”) no later than thirty (30) days after the date of the Offering Notice, the time of such exercise being of the essence. Tenant’s Expansion Exercise Notice shall set forth the rentable square footage of the Station 5

Exercise of Option. This Option is exercisable as follows:

Exercise of Option. Effective as of today, , the undersigned (the “Optionee”) hereby elects to exercise Optionee’s option to purchase shares of the Common Stock (the “Shares”) of Gritstone Oncology, Inc., a Delaware corporation (the “Company”), under and pursuant to the Gritstone Oncology, Inc. 2015 Equity Incentive Plan, as amended from time to time (the “Plan”), and the Stock Option Grant Notice and Stock Option Agreement, dated (the “Option Agreement”). Capitalized terms used herein without definition shall have the meanings given in the Option Agreement.

The Option shall not be exercisable as of the Grant Date set forth in the Grant Notice. After the Grant Date, to the extent not previously exercised, and subject to termination or acceleration as provided in these Standard Terms and Conditions and the Plan, the Option shall be exercisable only to the extent it becomes vested, as described in the Grant Notice, these Standard Terms and Conditions and/or the terms of the Plan, to purchase up to that number of shares of Common Stock as set forth in the Grant Notice, provided that (except as may be provided otherwise in Section 4 below) the Participant remains employed with the Company and does not experience a termination of employment.

Exercise of Option. Effective as of today, , , the undersigned (“Participant”) hereby elects to exercise Participant’s option (the “Option”) to purchase shares of the Common Stock (the “Shares”) of [[Organization A:Organization]] (the “Company”) under and pursuant to the 2015 Equity Incentive Plan (the “Plan”) and the Stock Option Agreement dated , (the “Option Agreement”).

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.

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: