UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to 2445 Technology Forest Blvd, Building 4, 12th Floor The Woodlands, Texas 77381 (Address of principal executive offices) (Zip Code) (281) 403-5772 (Registrant's telephone number, including area code) classTradingSymbol(s)Nameof parvalueCHXThe Indicate by check ma ...