CTMX · CytomX Therapeutics, Inc.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 25% of the RSUs vest annually on September 15 of each year, with the first 25% vesting on September 15, 2027, subject to the Reporting Person's continued service to the Issuer through each such date.

Includes 100,000 RSUs.

25% of the shares subject to the option vest on the one-year anniversary measured from August 3, 2026 (the "Vesting Commencement Date"), and 1/48 monthly thereafter such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/36th of the shares subject to the option vest on each monthly anniversary measured from July 24, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the third anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2027 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 167,249 RSUs.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 173,082 RSUs.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 457,500 RSUs.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 135,833 RSUs.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 149,833 RSUs.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2027, subject to the Reporting Person continuing as a service provider through each such date.

Includes 206,000 RSUs.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2027, subject to the Reporting Person continuing as a service provider through each such date.

Includes 20,000 RSUs.

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 2, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 2, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 2, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2027, subject to the Reporting Person continuing as a service provider through each such date.

Includes 698,750 RSUs.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2027, subject to the Reporting Person continuing as a service provider through each such date.

Includes 239,987 RSUs.

Constitute restricted stock units ("RSUs") for which the Reporting Person is entitled to receive one (1) share of Common Stock for each RSU upon vesting. 1/3rd of the RSUs vest annually on March 15 of each year, with the first 1/3rd vesting on March 15, 2027, subject to the Reporting Person continuing as a service provider through each such date.

Includes 218,958 RSUs.

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 2, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

Each Performance Stock Unit ("PSU") represents a contingent right to receive one (1) share of Common Stock upon vesting. 1/3 of the PSUs vest upon the achievement of each of three clinical milestones, subject to the Reporting Person continuing as a service provider through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from February 2, 2026 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

The transactions reported herein were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan, adopted on August 27, 2024.

This transaction was executed in multiple trades at prices ranging from $4.50 to $4.62, inclusive. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

Includes 488,750 restricted stock units.

25% of the shares subject to the option vest on the one year anniversary measured from October 20, 2025 (the "Vesting Commencement Date"), and 1/48th of the shares will vest monthly thereafter, such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from September 26, 2025 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from September 26, 2025 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

Each Performance Stock Unit ("PSU") represents a contingent right to receive one (1) share of Common Stock upon vesting. 1/3 of the PSUs vest upon the achievement of each of three clinical milestones, subject to the Reporting Person continuing as a service provider through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from September 26, 2025 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

1/48th of the shares subject to the option vest on each monthly anniversary measured from September 26, 2025 (the "Vesting Commencement Date"), such that 100% of the shares subject to the option will be fully vested and exercisable on the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person's continued service to the Issuer through each such date.

Each Performance Stock Unit ("PSU") represents a contingent right to receive one (1) share of Common Stock upon vesting. 1/3 of the PSUs vest upon the achievement of each of three clinical milestones, subject to the Reporting Person continuing as a service provider through each such date.

Each Performance Stock Unit ("PSU") represents a contingent right to receive one (1) share of Common Stock upon vesting. 1/3 of the PSUs vest upon the achievement of each of three clinical milestones, subject to the Reporting Person continuing as a service provider through each such date.

Each Performance Stock Unit ("PSU") represents a contingent right to receive one (1) share of Common Stock upon vesting. 1/3 of the PSUs vest upon the achievement of each of three clinical milestones, subject to the Reporting Person continuing as a service provider through each such date.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of PSUs.

Includes 158,958 restricted stock units.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of PSUs.

Includes 149,987 RSUs.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of PSUs.

Includes 488,750 restricted stock units.

This transaction represents the vesting of performance stock units ("PSUs") initially granted on February 2, 2023.

Includes 149,987 RSUs.

This transaction represents the vesting of performance stock units ("PSUs") initially granted on February 2, 2023.

Includes 488,750 restricted stock units.

The shares were sold solely to satisfy tax or other government withholding obligations in connection with the vesting of restricted stock units ("RSUs").

Includes 149,987 RSUs.

Each PSU represented a contingent right to receive one (1) share of common stock upon vesting.

This transaction represents the vesting of performance stock units ("PSUs") initially granted on February 2, 2023.

Includes 158,958 restricted stock units.

Each PSU represented a contingent right to receive one (1) share of common stock upon vesting.

Each PSU represented a contingent right to receive one (1) share of common stock upon vesting.

The underlying shares subject to the option vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2026 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date.