YARW · Yarrow Bioscience, Inc.

This option represents a right to purchase 15,435 shares of the Issuer's common stock, which vests in full on the earlier of (i) July 27, 2027 or (ii) the date of the next annual meeting of the Issuer's stockholders, in each case, subject to the recipient's continued service to the Issuer.

Pursuant to an agreement with OrbiMed Advisors LLC, the Reporting Person is obligated to transfer any securities issued under any such stock options or other awards, or the economic benefit thereof, to OrbiMed Advisors LLC, which will in turn ensure that such securities or economic benefits are provided to OrbiMed Private Investments X, LP.

This option represents a right to purchase 185,798 shares of the Issuer's common stock, one quarter of which will vest on July 27, 2027, with the remaining three quarters vesting in equal monthly installments over the following three years, subject to the Reporting Person's continued service to the Issuer on each such vesting date.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

These shares were acquired under the Issuer's Employee Share Purchase Plan ("ESPP") for the ESPP purchase period beginning on December 1, 2025 and ending on May 31, 2026 in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). In accordance with the terms of the ESPP, these shares were purchased at a price equal to 85% of the fair market value closing price of the Issuer's common stock on December 1, 2025 (the first trading day of the offering period). The Reporting Person purchased the maximum number of shares permitted by the terms of the ESPP during the calendar year.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2026, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2026, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2026, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2026, subject to the Reporting Person's continuous service through such date.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

These shares were acquired under the Issuer's Employee Share Purchase Plan ("ESPP") for the ESPP purchase period beginning on December 1, 2024 and ending on May 31, 2025 in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). In accordance with the terms of the ESPP, these shares were purchased at a price equal to 85% of the fair market value closing price of the Issuer's common stock on May 30, 2025 (the last trading day of the offering period).

These shares were acquired under the Issuer's Employee Share Purchase Plan ("ESPP") for the ESPP purchase period beginning on December 1, 2024 and ending on May 31, 2025 in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). In accordance with the terms of the ESPP, these shares were purchased at a price equal to 85% of the fair market value closing price of the Issuer's common stock on May 30, 2025 (the last trading day of the offering period). The Reporting Person purchased the maximum number of shares permitted by the terms of the ESPP during the calendar year.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

The shares subject to the option vest over a period of 4 years. 25% of the shares subject to the option will vest on March 31, 2026 and 6.25% of the shares will vest on the last day of each quarter thereafter. All vesting is subject to the Reporting Person's continuous service through each applicable vesting date.

The shares subject to the option vest over a period of 4 years. 25% of the shares subject to the option will vest on March 31, 2026 and 6.25% of the shares will vest on the last day of each quarter thereafter. All vesting is subject to the Reporting Person's continuous service through each applicable vesting date.

The shares subject to the option vest over a period of 4 years. 25% of the shares subject to the option will vest on March 31, 2026 and 6.25% of the shares will vest on the last day of each quarter thereafter. All vesting is subject to the Reporting Person's continuous service through each applicable vesting date.

The shares subject to the option vest over a period of 4 years. 25% of the shares subject to the option will vest on March 31, 2026 and 6.25% of the shares will vest on the last day of each quarter thereafter. All vesting is subject to the Reporting Person's continuous service through each applicable vesting date.

The price reported is a weighted average purchase price. The shares were purchased in multiple transactions at prices ranging from $2.8776 to $2.9836, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents shares that have been withheld by the Issuer to satisfy tax withholding requirements in connection with the vesting of restricted stock units.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2025, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2025, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2025, subject to the Reporting Person's continuous service through such date.

Represents the annual award to non-employee directors of the Issuer, awarded on the date of the Issuer's annual meeting of stockholders. The shares subject to the option vest on December 12, 2025, subject to the Reporting Person's continuous service through such date.