Initial Stock Ownership Filing by ANAPTYSBIO, INC.

ANAPTYSBIO, INC. (CIK: 0001370053) has filed a Form 3, reporting initial stock ownership in First Tracks Biotherapeutics, Inc. (TRAX). The filing, dated April 1, 2026, indicates that ANAPTYSBIO, INC. directly owns 100 shares of common stock in First Tracks Biotherapeutics, Inc. This ownership stems from a spin-off transaction where First Tracks Biotherapeutics, Inc. became a separate entity. ANAPTYSBIO, INC. is identified as a ten percent owner of First Tracks Biotherapeutics, Inc. The filing is signed by Dan Faga.