Form 4 Filing for ClearSign Technologies Corp

On April 23, 2026, G. Todd Silva, a director at ClearSign Technologies Corp, acquired 1,000 shares of common stock through two separate open-market purchases. The first purchase was for 1,000 shares at a price of $5.319 per share, and the second was for 1,000 shares at $5.25 per share. Following these transactions, the post-transaction number of shares owned is reported as 5,000 and 6,000 respectively, indicating these are direct holdings. The filing was signed on April 27, 2026.