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Each of the undersigned hereby certifies in his capacity as an officer of California BanCorp (the “Company”) that this Quarterly Report of the Company on Form 10-Q for the quarter ended June 30, 2024 fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.


Date: August 12, 2024						/s/ Steven E. Shelton
						Steven E. Shelton
						Chief Executive Officer
						(Principal Executive Officer)

Date: August 12, 2024						/s/ Thomas Dolan
						Thomas Dolan
						Chief Financial Officer
						(Principal Financial Officer)