Discretionary Nature of Award. The grant of an Award is a one-time benefit and does not create any contractual or other right to receive a grant of Awards or benefits in lieu of Awards in the future. Future grants, if any, will be at the sole discretion of the Corporation, including, but not limited to, the timing of any grant, the number of PRSUs and vesting provisions. The value of the Award is an extraordinary item outside the scope of the Participant’s employment contract, if any. As such, the Award is not part of normal or expected compensation for purposes of calculating any severance, resignation, termination, redundancy, dismissal, end of service payments, bonuses, long-service awards, leave-related payments, holiday pay, pension, retirement or welfare benefits or similar payments.

Discretionary Nature of Plan. The Plan is discretionary and may be amended, cancelled or terminated by the Company at any time, in its discretion. The grant of the Option in this Agreement does not create any contractual right or other right to receive any Options or other Awards in the future. Future Awards, if any, will be at the sole discretion of the Company. Any amendment, modification, or termination of the Plan shall not constitute a change or impairment of the terms and conditions of the Optionee’s engagement with the Company.

Discretionary Bonuses. The Compensation Committee may also make discretionary bonus payments under the Plan based upon such terms and conditions as the Compensation Committee may determine in its sole discretion, regardless of whether the Compensation Committee establishes such terms and conditions or a target amount for such discretionary bonus payment in advance.

Discretionary Termination. Regeneron, in its sole discretion, may terminate this Agreement in its entirety effective as of any time after the ​ of the Effective Date upon delivery of at least ​ days’ prior written notice to CytomX.

Discretionary Bonus. At the end of each Calendar year, if employed by the Company, Officer will be eligible for a discretionary cash bonus of between 50% and 125% of the Salary, with a target bonus of 100% of Officer’s Salary (the “Target Bonus”), based on the achievement of operational and strategic performance goals established by the Committee in consultation with Officer. Such discretionary annual bonus will be evaluated and paid (if applicable) no later than the last day of the second month following the calendar year in which such bonus was earned. The Officer and the Company will set forth the goals for 2021 within sixty (60) days after the date of this Agreement. Thereafter, goals will be set annually within sixty (60) days after the end of the company's fiscal year.

Discretionary Grants. In addition to the automatic grants described herein, the Board, in its sole discretion, may grant additional equity awards to certain Outside Directors for services to the Company that exceed the standard expectations of an Outside Director or for other circumstances determined appropriate by the Board, including, without limitation, an inducement for the Outside Director to remain on the Board or an initial grant for an individual to become an Outside Director.

Discretionary Bonus. For each calendar year during the Employment Period, Executive shall be eligible to receive a discretionary annual bonus subject to the terms of the bonus plan established by the Board (the “Annual Bonus”). As of the Effective Date, the Executive’s annual target bonus opportunity shall be equal to 100% of Base Salary (the “Target Bonus”), based on the achievement of performance goals established by the Board. For the 2018 calendar year, Executive will be eligible for a prorated Annual Bonus determined by multiplying the Annual Bonus (if any) by a fraction, the numerator of which is equal to the number of days Executive works in calendar year 2018 and the denominator of 365.

Discretionary Bonus. Although it is not anticipated by the parties, Executive may become eligible to receive an annual discretionary bonus. The actual amount of the annual discretionary bonus, if any, is to be determined by the Company, in its sole and absolute discretion (subject to appropriate withholdings and deductions); provided, however, that to be eligible to receive such bonus Executive must be employed by the Company on the date any such bonus is paid.

Discretionary Deferrals. The Board of Directors may, in its sole discretion, provide additional compensation to eligible directors in the form of Share Units, with such Share Units being deferred and credited to the participant’s deferred compensation account pursuant to Section 3.

Discretionary Authority. Subject to the express limitations of the Plan, the Administrator shall have authority in its sole discretion to determine the time or times at which bonus payments are made, the selection of Covered Executives, the determination of Performance Goals (as defined below), form of payment, and all other terms of the bonus payment. The Administrator shall have discretionary authority to interpret this Bonus Plan, to make all factual determinations under this Bonus Plan, and to make all other determinations necessary or advisable for the administration of this Bonus Plan. All interpretations, determinations, and actions, by the Administrator shall be final, conclusive, and binding upon all parties.