Sonex Research, Inc. - Sonex Combustion System | Annapolis, MD

Combustion specialists

Sonex became subject to the periodic reporting requirements of the Securities and Exchange Commission (SEC) upon making an initial public offering of its common stock in 1985. The stock eventually traded in the over-the- counter market and was last quoted on the Pink Sheets Electronic Quotation Service under the symbol "SONX". The Company, however, became deliquent in its annual and quarterly SEC reporting requirements and in July 2007 the SEC revoked the registration of the Company's stock; as a result, the stock ceased public trading.


Questions concerning shares held in "street name" in an account at a brokerage or other financial institution should be directed to your investment account representative.

For shareholders whose stock is registered in their own name and reflected by a physical stock certificate, Corporate Stock Transfer of Denver, Colorado, is serving as the stock transfer agent and registrar for Sonex common stock. All requests for certificate transfers, including restrictive legend removal, transfers to estates, etc., as well as replacement of lost certificates, are to be submitted to Corporate Stock Transfer, as follows:


Corporate Stock Transfer and Trust Co.

3200 Cherry Creek Drive South, Suite 430, Denver, CO  80209

Telephone: 303-282-4800

Fax: 303-282-5800


Telephone inquiries should be directed to account managers Carylyn Bell or Shari Humpherys. If you have any issues that cannot be resolved by Corporate Stock Transfer, please contact George E. Ponticas, Sonex CFO and Secretary.

Sonex Shareholders | Engine Testing Services | Annapolis, MD