UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-39242 CALIFORNIA BANCORP (Exact name of registrant as specified in its charter) California 82-1751097 (State or other jurisdiction of incor ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 Commission File Number 001-39242 CALIFORNIA BANCORP (Exact name of registrant as specified in its charter) California 82-1751097 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 1300 Clay Street, Suite 500 Oakland, California (Address of principal ex ...