ClearSign Technologies Corporation completed a private placement of 500,000 shares of common stock to Otter Capital LLC at $3.54 per share, generating $1,770,000 in gross proceeds. The company received a waiver from Newbridge Securities Corporation to permit the sale. ClearSign Technologies Corporation designs and develops products and technologies for decarbonization and improving industrial combustion and sensing systems.

ClearSign Technologies Corporation filed a prospectus supplement to recommence its at-the-market offering under an existing Sales Agreement with H.C. Wainwright & Co., LLC to sell up to $6,875,000 in common stock. ClearSign Technologies Corporation is a technology company that provides solutions for the reduction of harmful emissions in industrial and industrial-related processes.

On June 18, 2026, Newbridge Securities Corporation fully exercised an over-allotment option to purchase 116,667 additional shares of common stock from ClearSign Technologies Corporation. This transaction generated approximately $470,858 in net proceeds, which the company intends to use for working capital, research and development, marketing, sales, and general corporate purposes. This follows a previous public offering of 777,780 shares closed on June 1, 2026. ClearSign Technologies Corp provides industrial water treatment and wastewater management solutions.

ClearSign Technologies Corporation held its 2026 annual meeting of stockholders on June 8, 2026. Stockholders elected four directors, approved the appointment of BPM CPA LLP as the independent registered public accounting firm, and approved the amended and restated 2021 Equity Incentive Plan. They also approved the executive compensation on an advisory basis and the proposal to allow meeting adjournments. The company provides scale-free wastewater treatment solutions for industrial and water utilities.