TRAX

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 9

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2034-01-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 8

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,600

Underlying: Common Stock · 10,600 shares

Expires 2033-01-05

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 7

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,200

Underlying: Common Stock · 9,200 shares

Expires 2032-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 6

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 11,000 shares

Expires 2031-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 5

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 11,000 shares

Expires 2030-02-11

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 4

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires 2029-02-07

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 3

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires 2028-02-01

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001478916-26-000005 · form4-04222026_040415.xml · derivative · entry 2

Schmid John P. · CIK 0001478916 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Common Stock · 15,000 shares

Expires 2027-02-23

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 9

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F9 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F9 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 8

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,030

Underlying: Common Stock · 6,030 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F8 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 7

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,300

Underlying: Common Stock · 1,300 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F7 · derivative.exercise_date: The RSUs shall vest as to 1/3 of the total shares on September 15, 2024, and thereafter vests as to 1/3 of the total RSUs on September 15, 2025; and as to 1/3 of the total RSUs on September 15, 2026, subject to the provision of services to the Company on each vesting date.

F7 · derivative.expiration_date: The RSUs shall vest as to 1/3 of the total shares on September 15, 2024, and thereafter vests as to 1/3 of the total RSUs on September 15, 2025; and as to 1/3 of the total RSUs on September 15, 2026, subject to the provision of services to the Company on each vesting date.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 6

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,250

Underlying: Common Stock · 8,250 shares

Expires 2036-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F4 · derivative.exercise_date: The stock option vests as to 1/12 of the total shares monthly commencing on February 6, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 5

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2035-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 4

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2034-01-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 3

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,600

Underlying: Common Stock · 10,600 shares

Expires 2033-09-14

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001477384-26-000004 · form4-04222026_040413.xml · derivative · entry 2

Orwin John A · CIK 0001477384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,311

Underlying: Common Stock · 3,311 shares

Expires 2033-09-14

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 13

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,000

Underlying: Common Stock · 4,000 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F8 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 12

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,030

Underlying: Common Stock · 6,030 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F7 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F7 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 11

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,500

Underlying: Common Stock · 5,500 shares

Expires 2036-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F4 · derivative.exercise_date: The stock option vests as to 1/12 of the total shares monthly commencing on February 6, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 10

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2035-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 9

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2034-01-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 8

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,600

Underlying: Common Stock · 10,600 shares

Expires 2033-01-05

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 7

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,200

Underlying: Common Stock · 9,200 shares

Expires 2032-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 6

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 11,000 shares

Expires 2031-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 5

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 11,000 shares

Expires 2030-02-11

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 4

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires 2029-02-07

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 3

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,507

Underlying: Common Stock · 5,507 shares

Expires 2028-03-04

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001184627-26-000004 · form4-04222026_040411.xml · derivative · entry 2

FENTON DENNIS M · CIK 0001184627 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Common Stock · 6,000 shares

Expires 2028-03-04

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001370053-26-000005 · form4-04222026_040403.xml · nonDerivative · entry 1

ANAPTYSBIO, INC · CIK 0001370053 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · security: On April 1, 2026, AnaptysBio, Inc., a Delaware corporation ("AnaptysBio"), reported that it owned 100 shares of common stock, par value $0.001 per share, of First Tracks Biotherapeutics, Inc. ("First Tracks"), which at the time constituted all of the issued and outstanding shares of common stock of First Tracks.

F2 · kind: The record date for the distribution by AnaptysBio of all shares of common stock of First Tracks to the holders of AnaptysBio common stock was April 20, 2026 (the "Spin-Off"). The Spin-Off occurred before the market opened on April 20, 2026.

F3 · shares: Represents the outstanding shares of common stock of First Tracks as of April 20, 2026, which were distributed in the Spin-Off as defined in footnote 2 on April 20, 2026.

F2 · price: The record date for the distribution by AnaptysBio of all shares of common stock of First Tracks to the holders of AnaptysBio common stock was April 20, 2026 (the "Spin-Off"). The Spin-Off occurred before the market opened on April 20, 2026.

SEC source: 0000935836-26-000208 · ownership.xml · nonDerivative · entry 1

EcoR1 Capital, LLC · CIK 0001587114 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See Note

Disclosed balance after: 3,174,519

F2 · kind: The Funds sold these share in a private placement described in the Form 8K filed by the Issuer on April 20, 2026.

F3 · shares: Qualified Fund sold 4,420,064 of the securities in this transaction.

F4 · balance_after: After this transaction, Qualified Fund holds 2,981,908 shares of the Issuer's Common Stock.

F1 · ownership.nature: The reporting persons are EcoR1 Capital, LLC ("EcoR1"), Oleg Nodelman and EcoR1 Capital Fund Qualified L.P. ("Qualified Fund"). EcoR1 is the investment adviser and general partner of private funds, including Qualified Fund (collectively, the "Funds"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of such securities except to the extent of their pecuniary interests therein.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 10

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,000

Underlying: Common Stock · 4,000 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F8 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 9

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,030

Underlying: Common Stock · 6,030 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F7 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F7 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 8

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,500

Underlying: Common Stock · 5,500 shares

Expires 2036-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F4 · derivative.exercise_date: The stock option vests as to 1/12 of the total shares monthly commencing on February 6, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 7

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2035-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 6

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2034-01-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 5

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,600

Underlying: Common Stock · 10,600 shares

Expires 2033-01-05

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 4

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,200

Underlying: Common Stock · 9,200 shares

Expires 2032-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 3

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

Underlying: Common Stock · 11,000 shares

Expires 2031-02-09

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001631486-26-000005 · form4-04222026_040407.xml · derivative · entry 2

Marquet Magda · CIK 0001631486 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 784

Underlying: Common Stock · 784 shares

Expires 2031-01-17

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 9

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,000

Underlying: Common Stock · 4,000 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F9 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F9 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2027 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 8

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,030

Underlying: Common Stock · 6,030 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F8 · derivative.exercise_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

F8 · derivative.expiration_date: The RSUs vests as to 100% of the total RSUs on the date of the Issuer's 2026 annual meeting of shareholders, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 7

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,300

Underlying: Common Stock · 1,300 shares

Expires not disclosed

F5 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive 1 share of the Issuer's Common Stock upon settlement for no consideration.

F6 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation Agreement, each outstanding RSU with respect to AnaptysBio shares of common stock was adjusted so that such RSU became an RSU with respect to First Tracks shares of common stock and an RSU with respect to AnaptysBio's shares of common stock. As a result, the Reporting Person acquired RSU s with respect to First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F7 · derivative.exercise_date: The RSUs shall vest as to 33.33% of the total shares on June 15, 2024, and thereafter vests as to 33.33% of the total RSUs on June 15, 2025; and as to 33.33% of the total RSUs on June 15, 2026, subject to the provision of services to the Company on each vesting date.

F7 · derivative.expiration_date: The RSUs shall vest as to 33.33% of the total shares on June 15, 2024, and thereafter vests as to 33.33% of the total RSUs on June 15, 2025; and as to 33.33% of the total RSUs on June 15, 2026, subject to the provision of services to the Company on each vesting date.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 6

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,500

Underlying: Common Stock · 5,500 shares

Expires 2036-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F4 · derivative.exercise_date: The stock option vests as to 1/12 of the total shares monthly commencing on February 6, 2026 until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 5

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2035-01-06

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 4

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,510

Underlying: Common Stock · 16,510 shares

Expires 2034-01-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 3

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,015

Underlying: Common Stock · 8,015 shares

Expires 2033-04-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0001707797-26-000005 · form4-04222026_040409.xml · derivative · entry 2

Jain Rita · CIK 0001707797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,600

Underlying: Common Stock · 10,600 shares

Expires 2033-04-02

F2 · kind: Effective as of a pro rata distribution by AnaptysBio to holders of its shares of common stock pursuant to the Separation and Distribution Agreement dated as of April 20, 2026, by and between AnaptysBio and First Tracks (the "Separation Agreement"), each outstanding option to acquire AnaptysBio shares of common stock was adjusted so that such option became an option to acquire First Tracks shares of common stock and an option to acquire AnaptysBio shares of common stock. As a result, the Reporting Person acquired options to acquire First Tracks shares of common stock in an amount determined in accordance with the Separation Agreement.

F3 · derivative.exercise_date: The stock option is fully vested and exercisable.