LOUMEAU ERIC J 4

What Happened

• Eric J. Loumeau, Chief Legal Officer of ANAPTYSBIO, exercised options to acquire 10,000 shares at $29.70 per share (cost $297,000) on Feb 11, 2026, and sold 10,000 shares in an open-market transaction the same day at $54.00 per share (proceeds $540,000). The Form 4 also reports a derivative disposition of 10,000 shares at $0.00 on the same date.

Key Details

• Transaction date: February 11, 2026; Filing date (Form 4): February 13, 2026.
• Exercise: 10,000 shares @ $29.70 = $297,000 (code M).
• Sale: 10,000 shares @ $54.00 = $540,000 (code S).
• Derivative disposition: 10,000 shares @ $0.00 (code M) — reported as a disposition related to the option exercise.
• Plan/vesting notes: Transactions were executed under a 10b5-1 trading plan adopted April 11, 2025 (F1). The option exercised was fully vested (F2). The reporting person also holds additional options to purchase up to 436,010 shares that vest per their terms (F3).
• Shares owned after the transactions: not specified in the filing.
• Filing timeliness: The Form 4 was filed within two days of the transaction date; no late filing was indicated.

Context

• This pattern — exercising vested options and immediately selling the same number of shares — is commonly a cashless/offsetting action to realize gains or cover exercise costs and tax obligations. The reported disposition of 10,000 shares at $0.00 often reflects shares surrendered or withheld to satisfy payment or tax withholding related to the exercise (the filing does not provide further detail). These transactions were conducted under a pre-established 10b5-1 plan, which means the trades were scheduled in advance rather than being ad hoc.