Gaiero David G

SEC source: 0001209191-24-004439 · doc4.xml · derivative · entry 6

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,052

Underlying: Common Stock · 2,373 shares

Expires 2033-02-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vests as to 1/48th of the underlying shares on each monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-24-004439 · doc4.xml · nonDerivative · entry 3

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,391

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-24-004439 · doc4.xml · derivative · entry 5

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,425

Underlying: Common Stock · 4,746 shares

Expires 2033-02-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vests as to 1/48th of the underlying shares on each monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-24-004439 · doc4.xml · derivative · entry 4

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,196

Underlying: Common Stock · 3,239 shares

Expires 2030-12-10

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option vested as to 25% of the underlying shares of common stock on December 7, 2021, the first anniversary of the vesting commencement date, and vests as to 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-24-004439 · doc4.xml · nonDerivative · entry 2

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,018

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-24-004439 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,272

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-058610 · doc4.xml · derivative · entry 4

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,171

Underlying: Common Stock · 2,373 shares

Expires 2033-02-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vests as to 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-23-058610 · doc4.xml · derivative · entry 3

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,435

Underlying: Common Stock · 1,620 shares

Expires 2030-12-10

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option vested as to 25% of the underlying shares of common stock on December 7, 2021, the first anniversary of the vesting commencement date, and vests as to 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-23-058610 · doc4.xml · nonDerivative · entry 2

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,033

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-058610 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,660

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-056425 · doc4.xml · derivative · entry 4

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,544

Underlying: Common Stock · 21,356 shares

Expires 2033-02-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The option vests as to 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-23-056425 · doc4.xml · derivative · entry 3

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,055

Underlying: Common Stock · 52,584 shares

Expires 2030-12-10

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option vested as to 25% of the underlying shares of common stock on December 7, 2021, the first anniversary of the vesting commencement date, and vests as to 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-23-056425 · doc4.xml · nonDerivative · entry 2

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,040

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 5,000 shares of the Company's common stock pursuant to the Cyteir Therapeutics, Inc. Employee Stock Purchase Program ("ESPP"). In accordance with the ESPP, these shares were purchased based on 85% of the closing stock price on January 17, 2023.

SEC source: 0001209191-23-056425 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,684

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-23-007536 · doc4.xml · derivative · entry 2

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 113,900

Underlying: Common Stock · 113,900 shares

Expires 2033-02-03

F2 · derivative.exercise_date: The shares of common stock underlying this stock option award vest as to 2.083% in 48 equal monthly installments after the grant date, subject to the Reporting Person's continued employment with the Company through the applicable vesting date.

SEC source: 0001209191-23-007536 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,100

F1 · kind: The reporting person is voluntarily reporting the acquisition of the Company's common stock pursuant to the Cyteir Therapeutics, Inc. Employee Stock Purchase Program ("ESPP"), for the ESPP purchase period of July 15, 2022 through January 13, 2023. This transaction is also exempt from Rule 16b-3(c). In accordance with the ESPP, these shares were purchased based on 85% of the closing stock price January 13, 2023, the last trading day of the purchase period.

SEC source: 0000899243-22-007631 · doc4.xml · derivative · entry 1

Gaiero David G · CIK 0001799784 · Vice President, Finance

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,000

Underlying: Common Stock · 23,000 shares

Expires 2032-02-22

F1 · derivative.exercise_date: The shares of common stock underlying this stock option award vest as to 2.083% in 48 equal monthly installments, subject to the Reporting Person's continued employment with the Company through the applicable vesting date.

SEC source: 0001209191-23-007528 · doc4.xml · derivative · entry 2

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,639

Underlying: Common Stock · 4,100 shares

Expires 2030-12-10

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Due to rounding in connection with the Issuer's reverse stock split during its initial public offering, the exercise price for this option was immaterially incorrect as reported on the Reporting Person's Form 3 filing on June 17, 2021, and has been corrected in this Form 4.

F2 · derivative.exercise_date: The option vested as to 25% of the underlying shares of common stock on December 7, 2021, the first anniversary of the vesting commencement date, and vests 1/48th of the underlying shares thereafter on each subsequent monthly anniversary of the vesting commencement date until the option is fully vested, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date.

SEC source: 0001209191-23-007528 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,100

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Due to rounding in connection with the Issuer's reverse stock split during its initial public offering, the exercise price for this option was immaterially incorrect as reported on the Reporting Person's Form 3 filing on June 17, 2021, and has been corrected in this Form 4.

SEC source: 0000899243-20-007284 · doc4.xml · derivative · entry 1

Gaiero David G · CIK 0001799784 · Interim CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,000

Underlying: Ordinary Shares · 18,000 shares

Expires 2030-03-03

F1 · derivative.exercise_date: The option vests as to 50% of the shares on February 1, 2021 and 50% on February 1, 2022.

SEC source: 0000899243-20-003379 · doc4.xml · nonDerivative · entry 1

Gaiero David G · CIK 0001799784 · Interim CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,392

F1 · kind: On February 3, 2020, the reporting person sold 651 ordinary shares solely to cover taxes associated with the vesting of restricted share units on February 1, 2020. These sales were made pursuant to a 10b5-1 Trading Plan.

F2 · price: The price reflected is the weighted-average sale price for shares sold. The shares were sold in multiple transactions and the range of sale prices for the transactions reported was $7.00 to $7.049 per share. 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.