Form 4 Filing for ANAPTYSBIO, INC.

This filing details a transaction by Gray Susannah, a director at ANAPTYSBIO, INC. The transaction, which occurred on April 27, 2026, involved the acquisition of 11,250 Restricted Stock Units (RSUs). These RSUs represent a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs will vest over a period, with one-third vesting on April 27, 2027, and the remainder vesting in equal annual installments thereafter, contingent upon continued service. The reported shares acquired are post-transaction shares, indicating the total number of shares owned after this acquisition.