Power of Attorney for Susannah Gray

This filing contains a Power of Attorney document empowering Daniel Faga, Dave McKeon, and Eric Loumeau to act as attorneys-in-fact for Susannah Gray. This authorization pertains to the execution and filing of SEC forms, specifically Forms 3, 4, and 5, related to transactions in the securities of AnaptysBio, Inc. ("Company"). The attorneys-in-fact are empowered to take all necessary actions to complete, execute, and file these reports with the SEC and any stock exchanges. The Power of Attorney also clarifies that neither the attorneys-in-fact nor the Company assume Gray's responsibility for complying with Section 16 of the Exchange Act. The authorization remains in effect until Gray is no longer required to file these forms or until she revokes it in writing. The document was signed by Susannah Gray on April 2, 2026.