ClearSign Technologies sells 116,667 shares in over-allotment exercise, raising net proceeds of about $470,858

• ClearSign Technologies’ underwriter fully exercised its over-allotment option, buying 116,667 shares in the follow-on offering.
• Net proceeds totaled about $470,858, reflecting underwriting discounts, commissions, and estimated offering expenses.
• Shares were sold at a public offering price of $4.33 each.
• Proceeds earmarked for working capital, research and development, marketing and sales, and general corporate purposes.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Clearsign Technologies Corporation published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001104659-26-075734), on June 18, 2026, and is solely responsible for the information contained therein.