QuantumSi(QSI) - 2021 Q3 - Quarterly Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or 530 Old Whitfield Street Guilford, Connecticut 06437 (Address of principal executive offices) (Zip Code) (203) 458-7100 (Registrant's telephone number, including area code) Not applicable (Former name, former address and former fiscal year, if changed since last report) Secur ...