ClearSign Combustion Corporation Closes $12.94 M Public Offering of Common Stock

SEATTLE, Feb. 27, 2018 /PRNewswire/ -- ClearSign Combustion Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion technologies that reduce emissions and improve efficiency, today announced the closing of its previously announced underwritten public offering of 5,000,000 shares of common stock at a price of $2.25 per share. In addition, the underwriter exercised the over-allotment option to purchase 750,000 additional shares of common stock at the public offering price. All of the common stock was offered by the Company.

National Securities Corporation, a wholly owned subsidiary of National Holdings Corporation (NasdaqCM:NHLD), acted as sole book running manager for the offering.

The gross proceeds from the offering, including the exercise of the over-allotment option, were approximately $12.94 million, excluding underwriting discounts and commissions and other offering-related expenses.

ClearSign intends to use the net proceeds from the offering primarily for sales and marketing, business development, research and development, working capital and general corporate purposes.

The prospectus supplement relating to this offering was filed with the U.S. Securities and Exchange Commission (SEC) on February 26, 2018. Copies of the final prospectus supplement and the accompanying base prospectus relating to the offering may be obtained by request to the offices of National Securities Corporation, Attn: Marguerite Rogers, Sr. Vice President, 200 Vesey St, 25th Floor, New York, NY 10281, Telephone: (212)-417-8227; Email: prospectusrequest@nationalsecurities.com; or the on the SEC's website at http://www.sec.gov.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale is not permitted.

About ClearSign Combustion Corporation

ClearSign Combustion Corporation designs and develops products and technologies for the purpose of improving key performance characteristics of combustion systems, including emissions and operational performance, energy efficiency and overall cost-effectiveness. Our patented Duplex™, Duplex Plug & Play™ and Electrodynamic Combustion Control™ platform technologies enhance the performance of combustion systems in a broad range of markets, including the energy (upstream oil production and down-stream refining), commercial/industrial boiler, chemical, petrochemical, and power industries. For more information, please visit www.clearsign.com.

Cautionary Note on Forward-Looking Statements

All statements in this press release that are not based on historical fact are "forward-looking statements." While management has based any forward-looking statements included in this press release on its current expectations, the information on which such expectations were based may change. These forward-looking statements rely on a number of assumptions concerning future events and are subject to a number of risks, uncertainties and other factors, many of which are outside of the Company's control, which could cause actual results to materially differ from such statements. Such risks, uncertainties and other factors include, but are not limited to, general business and economic conditions, the performance of management and the Company's employees, the Company's ability to obtain financing, competition, whether the Company's technology will be accepted and other factors identified in the Company's Annual Report on Form 10-K filed with the Securities & Exchange Commission and available at www.sec.gov and other factors that are detailed in the Company's periodic and current reports available for review at www.sec.gov. Furthermore, the Company operates in a competitive environment where new and unanticipated risks may arise. Accordingly, investors should not place any reliance on forward-looking statements as a prediction of actual results. The Company disclaims any intention to, and undertakes no obligation to, update or revise forward-looking statements to reflect events or circumstances that subsequently occur or of which the Company hereafter becomes aware.

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SOURCE ClearSign Combustion Corporation

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