WHITE ROBERT S. 4

What Happened
Robert S. White, a director of AtriCure, exercised stock options on March 10, 2026 to acquire 10,000 shares at an exercise price of $14.99 (cost/value $149,900) and a matching disposition of 10,000 shares at $14.99 (proceeds $149,900). Both transactions are reported as derivative transactions (code M for option exercise/conversion).

Key Details

• Transaction date: 2026-03-10; Form 4 filed: 2026-03-12 (timely filing).
• Exercise: 10,000 shares at $14.99 each — $149,900 (acquired).
• Disposition: 10,000 shares at $14.99 each — $149,900 (disposed).
• Shares owned after transaction: not disclosed in the provided filing excerpt.
• Footnote: The options were granted May 25, 2016; vesting was 25% after one year and the remaining 75% monthly over the following three years.
• Transaction code: M (exercise/conversion of derivative).

Context
The filing shows an acquisition via option exercise and an equal, same-price disposition on the same date, which commonly reflects shares sold upon exercise (e.g., cashless exercise or sell-to-cover) rather than an open-market purchase. This type of derivative transaction typically does not indicate a net increase in beneficial ownership when acquisition and disposition quantities match.