GRAY SUSANNAH 4

What Happened
Susannah Gray, a director of AnaptysBio, received a grant of 11,250 restricted stock units (RSUs) on April 27, 2026. The award is recorded as a derivative acquisition at $0.00 per RSU; no cash was paid. The RSUs represent contingent rights to receive one share of ANAB common stock per RSU upon settlement, subject to the vesting schedule.

Key Details

• Transaction date: April 27, 2026 (reported on Form 4 filed April 29, 2026). Filing appears timely.
• Security and amount: 11,250 restricted stock units (RSUs) awarded; $0 per unit (no cash paid at grant).
• Vesting: 1/3 of the RSUs vest on April 27, 2027; the remaining RSUs vest in equal annual installments thereafter, contingent on continued service.
• Shares owned after transaction: Not disclosed in the provided filing excerpt.
• Footnotes: F1 clarifies each RSU converts to 1 share on settlement for no consideration; F2 details the vesting schedule above.
• Transaction code: A (award/grant of derivative securities).

Context
RSUs are a form of compensation and do not transfer shares until they vest and are settled; this is typically a retention/incentive grant rather than an immediate market bet. The economic value to the recipient will depend on AnaptysBio’s stock price at settlement dates. This report documents a grant (not a purchase or sale) and therefore does not directly signal buying or selling by the insider.