DIGIANDOMENICO ANTHONY 4

What Happened Anthony Digiandomenico, a director of ClearSign Technologies Corp (CLIR), was granted non‑statutory stock options to purchase 3,024 shares of common stock on March 31, 2026. The Form 4 reports the award as a derivative acquisition at $0.00 (grant of options); the filing notes these options were granted as compensation for his services as a non‑employee director and were immediately vested and exercisable. The grant was made under the ClearSign Technologies Corporation 2021 Equity Incentive Plan.

Key Details

• Transaction date: 2026-03-31; Form 4 filed: 2026-04-02.
• Transaction type: Award (derivative) — 3,024 non‑statutory stock options reported as acquired at $0.00.
• Vesting/exercise: Options were immediately vested and exercisable on the grant date (per footnote).
• Shares/holdings after transaction: Not specified in the provided filing.
• Footnote: Grant was compensation for director services for the quarter ended March 31, 2026, under the issuer’s non‑employee director compensation policy.
• Filing timeliness: Filed two days after the grant date; no late filing indicated in the provided data.

Context This was an option award (compensation), not an open‑market purchase or sale. Such grants are common for non‑employee directors and do not by themselves signal buying or selling of stock — the economic impact depends on the option exercise price and whether/when the options are exercised or sold. Immediate vesting means the director can exercise the options at his discretion going forward (subject to plan terms).