XNCR · Xencor Inc

This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on June 26, 2025.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

The shares subject to the option will vest in equal monthly installments over one year beginning on the one-month anniversary of June 16, 2026, such that the total number of shares will be fully vested on June 16, 2027.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

Represents restricted stock units that shall fully vest on the first anniversary of the date of grant.

This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on June 26, 2025.

This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on March 4, 2026.

This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on June 27, 2025.

This transaction is pursuant to a 10b5-1 plan adopted by the Reporting Person on June 24, 2025.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 14,088 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 4,363 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 18,179 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 6,908 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 7,316 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 36,581 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 9,950 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 7,316 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 17,507 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 6,253 restricted stock units.

Represents the disposition of shares that were sold to pay withholding taxes upon vesting of 3,502 restricted stock units.

Represents restricted stock units that vest as follows: 1/3 of the shares vest on the first, second and third anniversaries of the date of grant, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

25% of the shares subject to the option shall vest on the one year anniversary of March 2, 2026 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested and exercisable on the four year anniversary of the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

25% of the shares subject to the option shall vest on the one year anniversary of March 2, 2026 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested and exercisable on the four year anniversary of the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

25% of the shares subject to the option shall vest on the one year anniversary of March 2, 2026 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested and exercisable on the four year anniversary of the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

25% of the shares subject to the option shall vest on the one year anniversary of March 2, 2026 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested and exercisable on the four year anniversary of the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

Represents restricted stock units that vest as follows: 1/3 of the shares vest on the first, second and third anniversaries of the date of grant, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

Includes the following shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan: 977 shares acquired on June 10, 2025 and 257 shares on December 10, 2025.

Represents restricted stock units that vest as follows: 1/3 of the shares vest on the first, second and third anniversaries of the date of grant, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

Represents restricted stock units that vest as follows: 1/3 of the shares vest on the first, second and third anniversaries of the date of grant, subject to the Reporting Person's continuous service to the Issuer on and through each applicable vesting date, inclusive.

Includes the following shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan: 1,108 shares acquired on June 10, 2025.

Represents the exercise of an expiring option grant.

25% of the shares subject to the option vested on the one year anniversary of January 26, 2016 (the "Vesting Commencement Date"), and 1/48th of the shares vested monthly thereafter, such that the option was fully vested and exercisable on the four year anniversary of the Vesting Commencement Date.

Represents the exercise of an expiring option grant.

25% of the shares subject to the option vested on the one year anniversary of January 26, 2016 (the "Vesting Commencement Date"), and 1/48th of the shares vested monthly thereafter, such that the option was fully vested and exercisable on the four year anniversary of the Vesting Commencement Date.

Represents the exercise of an expiring option grant.

25% of the shares subject to the option vested on the one year anniversary of January 26, 2016 (the "Vesting Commencement Date"), and 1/48th of the shares vested monthly thereafter, such that the option was fully vested and exercisable on the four year anniversary of the Vesting Commencement Date.

Represents the exercise of an expiring option grant.

25% of the shares subject to the option vested on the one year anniversary of January 26, 2016 (the "Vesting Commencement Date"), and 1/48th of the shares vested monthly thereafter, such that the option was fully vested and exercisable on the four year anniversary of the Vesting Commencement Date.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.52 to $15.92, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.51 to $15.97, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.