Biebighauser Lon A. 4

What Happened
Lon A. Biebighauser, Trust Company President at First Financial Bankshares (FFIN), exercised 490 derivative units (option exercise) on 2026-05-06 at an exercise price of $21.18 per share, for a total of $10,378. The filing also shows a simultaneous disposition of the same 490 shares (reported as a derivative disposition) at $21.18, also totaling $10,378. Because the shares were immediately disposed, there was no net increase in his long stock position.

Key Details

• Transaction date: 2026-05-06; Form 4 filed 2026-05-07 (timely filing).
• Exercise: 490 shares @ $21.18 = $10,378 (transaction code M — option exercise).
• Disposition: 490 shares @ $21.18 = $10,378 (reported as derivative disposition).
• Shares owned after transaction: not specified in the provided filing excerpt.
• Footnotes/plan details: none provided in the supplied data.
• Timeliness: Filing appears timely (filed the next day).

Context
The filing shows an option exercise immediately followed by a disposition of the same shares (a common pattern often used to cover exercise costs or tax withholding). The Form 4 does not state the reason for the disposition, so no conclusion about the insider's view of the company should be drawn from this single, routine transaction.