ClearSign Technologies Announces Proposed Public Offering of Common Stock – Form 8-K

ClearSign Technologies Corporation

announces a proposed public offering of ordinary shares

Tulsa, okay. May 26, 2022 – ClearSign Technologies Corporation (Nasdaq: CLIR) (“ClearSign” or the “Company”), an emerging leader in industrial combustion and sensing technologies that improve energy, operational efficiency and safety while reducing the issuances significantly, announced today that it proposes to sell its common stock in a public subscription offering. All shares in the guaranteed public offering must be sold by ClearSign. ClearSign intends to grant the subscriber a 30-day option to purchase an additional 15% of the common shares offered in the public offering at the public offering price, less the underwriting discount. ClearSign intends to use the net proceeds from the offering for working capital, research and development, marketing and sales, and general corporate purposes. The final terms of the offer will depend on market and other conditions at the time of pricing, and there can be no assurance whether or not the offer will be completed, or as to the actual size or terms of the offer.

Newbridge Securities Corporation is acting as sole bookrunner for the offering.

The shares described above are offered by ClearSign pursuant to a shelf registration statement filed with and subsequently declared effective by the Securities and Exchange Commission (“SEC”). A preliminary prospectus supplement relating to the offering has been filed with the SEC and is available on the SEC’s website at http://www.sec.gov. A definitive prospectus supplement describing the terms of the offering will be filed with the SEC. The Offering will be made only by means of the Prospectus Supplement and the accompanying Base Prospectus, which may be supplemented by any free written prospectus and/or pricing supplement that the Company may file with the SEC. This press release does not constitute an offer to sell or the solicitation of an offer to buy any of the securities described herein, and there will be no sale of such securities in any state or jurisdiction in which a such offer, solicitation or sale would be unlawful. prior to registration or qualification under the securities laws of such state or territory. Copies of the preliminary prospectus supplement and accompanying base prospectus relating to this offering may be obtained from Newbridge Securities Corporation, Attn: Equity Syndicate Department, 1200 North Federal Highway | Office 400 | Boca Raton, FL 33432, email: syndicate@newbridgesecurities.com, phone: (877) 447-9625.

About ClearSign Technologies Corporation

ClearSign Technologies Corporation designs and develops products and technologies to improve key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, security and overall cost effectiveness. . Our patented technologies, incorporated into established OEM products such as ClearSign Core™ and ClearSign Eye™ and other sensing configurations, improve the performance of combustion systems and fuel safety systems in a wide range of markets, including energy (upstream and downstream oil production). flux refining), commercial/industrial boiler making, chemical, petrochemical, transport and energy industries. For more information, visit www.clearsign.com.

Caution Regarding Forward-Looking Statements

This press release contains forward-looking statements regarding the proposed public offering and the intended use of proceeds from the offering. The Offer is subject to market and other conditions and there can be no guarantee as to whether or when the Offer will be successful or as to the actual size or terms of the Offer. Forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual results to differ materially, including the risks disclosed in the “Risk Factors” section included in the preliminary prospectus supplement filed with May 26, 2022. ClearSign cautions readers not to place undue reliance on forward-looking statements. The Company does not undertake, and specifically disclaims any obligation, to update or revise these statements to reflect new circumstances or unforeseen events as they occur.

For more information:

Investor Relations:

Matthew Selinger

Cabinet IR Group for ClearSign

+1 415-572-8152

mselinger@firmirgroup.com

About Barbara J. Ross

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