Tecogen Inc., a leading manufacturer of clean energy products, has announced the pricing of an underwritten public offering of 3,500,000 shares of its common stock at $5 per share. The offering is expected to generate gross proceeds of approximately $17,500,000, prior to deducting underwriting discounts and commissions and other expenses. Roth Capital Partners is acting as the sole manager for the offering, which is anticipated to close around July 21, 2025, subject to customary conditions. The offering is being conducted under a Registration Statement on Form S-1, which was declared effective by the SEC on July 17, 2025. Tecogen plans to use the proceeds for product development, sales and marketing activities, expansion into the data center market, and general corporate purposes.