Exhibit 99.1

California BanCorp Reports Financial Results for the First Quarter

Ended March 31, 2020

OAKLAND, Calif., May 1, 2020 – California BanCorp (the “Company”) (Nasdaq-CALB), the parent company of California Bank of Commerce (the “Bank”), today announced its financial results for the first quarter ended March 31, 2020.

Net income was $473 thousand for the first quarter of 2020, representing a decrease of $105 thousand, or 18% compared to $578 thousand for the fourth quarter of 2019 and a decrease of $1.4 million, or 75%, compared to $1.9 million for the first quarter of 2019. Diluted earnings per share of $0.06 for the first quarter of 2020 compared to $0.07 for the fourth quarter of 2019 and $0.23 for the same period one year ago.

“As we all experience the pressure that the COVID-19 pandemic has caused, the first quarter represents the culmination of an extraordinary effort launched in 2018 to expand our activities, build capabilities and advance our infrastructure. During the quarter, we continued to advance these initiatives while engaging responses during this human crisis to focus on ensuring the health and safety of our employees, helping our clients navigate a challenging, rapidly changing situation, and positioning the Bank to consistently execute our strategy,” said Steven Shelton, President and CEO of California BanCorp. “As the broader economic picture remains uncertain, our solid financial foundation of strong capital and liquidity should position us well for the current environment. We believe our clients entered this event in a position of financial strength, and the combination of their financial health and available financing tools will enable us to support and lend to our clients and manage the impact of a weaker economy while investing in our long-term growth.”

Highlights:

Financial Position

March 31, 2020 compared to March 31, 2019

March 31, 2020 compared to December 31, 2019

Income Statement

Three months ended March 31, 2020 compared to March 31, 2019

Three months ended March 31, 2020 compared to December 31, 2019

Impact of and Response to the COVID-19 Pandemic

In response to the rapidly evolving COVID-19 pandemic, the Company focused first on the well-being of its people, customers and communities. Preventive health measures were put in place including elimination of business-related travel requirements, mandatory work from home for all employees able to do so, social distancing precautions for all employees in the office and customers visiting branches, and preventive cleaning at offices and branches.

The Company also focused on business continuity measures including monitoring potential business interruptions, making improvements to our remote working technology, and conducting regular discussions with our technology vendors to ensure full functionality throughout this event.

The Company has also taken measures to both support customers affected by the pandemic and to maintain strong asset quality, including:

The Company anticipates that it will take advantage of federal facilities in connection with funding loans under the PPP.

Balance Sheet

Total assets reached a record $1.21 billion as of March 31, 2020, up $169.0 million, or 16% compared to March 31, 2019 and $55.4 million, or 5% over December 31, 2019.

Total asset growth was driven by growth in deposits which increased by $157.7 million, or 18%, to $1.03 billion at March 31, 2020 from $871.2 million at March 31, 2019, and $40.6 million, or 4%, from $988.2 million at December 31, 2019.

Commercial noninterest-bearing deposits represented $67.5 million of total deposit growth year over year, and $16.0 million compared to December 31, 2019, growth of 20% year over year and 4% linked quarter. Noninterest-bearing deposits at March 31, 2020 were 39.2% of total deposits compared to 38.5% of total deposits at March 31, 2019 and 39.2% at December 31, 2019.

At March 31, 2020 growth in interest-bearing deposits of $90.2 million compared to March 31, 2019 was comprised of growth in money market and savings balances of $45.0 million and time deposits of $50.0 million, partially offset by a decline in interest-bearing demand deposits of $4.8 million. Compared to December 31, 2019, interest-bearing deposits grew $24.6 million, primarily due to growth in credit enhanced time deposits through the CDARs network.

Total gross loans increased by $82.6 million, or 9% to $968.9 million at March 31, 2020, from $886.3 million at March 31, 2019 and by $19.3 million, or 2%, from $950.0 million at December 31, 2019. Compared to the same date last year, loan growth was primarily driven by growth of $47.3 million in commercial and industrial loans and $34.0 million in commercial real estate loans. Compared to December 31, 2019, growth within the loan portfolio was primarily comprised of growth in commercial and industrial loans of $26.6 million offset by a decrease in commercial real estate loans of $6.2 million.

Total shareholder’s equity increased by $7.5 million, or 6% to $131.2 million at March 31, 2020 from $123.7 million at March 31, 2019 and $130.3 million at December 31, 2019. The increases are primarily attributed to retention of earnings. Tangible book value per common share increased to $15.22 at March 31, 2020 from $15.16 at December 31, 2019, and $14.42 at March 31, 2019.

Asset Quality

The provision for credit losses decreased to $400 thousand for the first quarter of 2020, compared to $581 thousand for the first quarter of 2019 and $1.0 million for the fourth quarter of 2019. Net loan (recoveries) charge-offs in the first quarter of 2020 were $(90) thousand, or (0.04)% of average loans (annualized), compared to net charge-offs of $131 thousand, or 0.06%, in the first quarter of 2019 and $338 thousand, or 0.14%, in the fourth quarter of 2019.

Non-performing assets (“NPAs”) to total assets of 0.22% at March 31, 2020, compared to 0.40% at March 31, 2019 and 0.24% at December 31, 2019. Non-performing loans were $2.7 million at March 31, 2020 compared to $4.2 million at March 31, 2019 and $2.8 million at December 31, 2019. At March 31, 2020, the allowance represented 436% coverage of non-performing assets, up from 269% at March 31, 2019 and 402% at December 31, 2019.

The allowance for loan losses increased by $490 thousand to $11.6 million, or 1.19% of total loans at March 31, 2020, compared to $11.3 million, or 1.27% of total loans at March 31, 2019 and $11.1 million, or 1.17% of total loans at December 31, 2019. The Company has elected to defer implementation of ASU 2016-13, which is referred to as the current expected credit loss (CECL) model and as such the change in the allowance was primarily the result of provisions determined under the incurred loss model which considered charge-off activity loan growth.

Net Interest Income and Net Interest Margin – three months ended March 31, 2020 and March 31, 2019

Net interest income for the three months ended March 31, 2020, was $10.2 million, an increase of $345 thousand, or 4% over $9.8 million for the same period in 2019. The increase in net interest income was primarily due to growth in average earning assets offset, in part, by lower average yields.

Average total interest-earning assets increased by $140.5 million, or 15.0% to $1.08 billion in the first quarter of 2020 from $936.9 million for the same period during 2019. For the three months ended March 31, 2020, growth in average deposits outpaced growth in average loans when compared to the same period of 2019 as the Company worked to strengthen liquidity. Average deposit balances for the three months ended March 31, 2020 grew $145.3 million, or 17%, from the quarter ended March 31, 2019, while average loans grew $93.0 million, or 11%, for the same period. As a result, the average loan to deposit ratio for the first quarter of 2020 was 95.2% down from 100.5% for the first quarter of 2019 and the yield on average earning assets decreased 39 basis points to 4.59% from 4.98%.

In addition, the average yield on total average gross loans in the three months ended March 31, 2020 was 4.98%, a decrease of 19 basis points compared to 5.17% in the same period one year earlier.

Of the $145.3 million increase in average total deposit balances year over year, $42.9 million were noninterest-bearing deposits while $102.4 million were interest-bearing. The cost of interest-bearing deposits was 1.28% during the quarter ended March 31, 2020 compared to 1.20% in the same quarter one year earlier. In addition, the overall cost of average total deposit balances increased by 7 basis points to 0.80% in the first quarter of 2020 compared to 0.73% in the first quarter of 2019.

As a result, the net interest margin decreased by 46 basis points to 3.80% for the three months ended March 31, 2020, compared to 4.26% for the three months ended March 31, 2019.

Net Interest Income and Net Interest Margin – three months ended March 31, 2020 and December 31, 2019

Net interest income was $10.2 million for the three months ended March 31, 2020, a decrease of $402 thousand or 4% from $10.6 million for the quarter ended December 31, 2019. The decrease in net interest income includes a decrease of $503 thousand in interest income comprised of decreases in interest and fees on loans of $349.0 thousand and interest on excess funds and investment securities of $154 thousand.

The decrease in net interest income was primarily due to lower yields on average earning assets, which decreased to 4.59% in the three months ended March 31, 2020 from 4.72% in the three months ended December 31, 2019.

Partially offsetting the decrease in interest income was a decrease of $103.5 thousand in interest expense. The decrease in interest expense was primarily due to a decrease of $102.4 thousand in interest expense on interest-bearing deposits due to lower rates paid. The average rate paid on interest-bearing deposits decreased by 8 basis points to 1.28% in the first quarter of 2020 compared to 1.36% in the fourth quarter of 2019. Noninterest-bearing demand deposits averaged 38.4% of total deposits in the first quarter of 2020 compared to 38.6% for the prior quarter.

Primarily as a result of lower yields on average earning assets, the net interest margin of 3.80% in the first quarter of 2020 represented a decrease of 10 basis points from 3.90% during the fourth quarter of 2019.

Non-Interest Income and Expense – three months ended March 31, 2020 and March 31, 2019

During the three months ended March 31, 2020, non-interest income totaled $1.3 million, an increase of $427 thousand, or 49.4% over the three months ended March 31, 2019. This increase was primarily the result of increases in loan fees, income from bank-owned life insurance and other miscellaneous income partially offset by decreases in deposit service charges and gains on sales of loans.

During the three months ended March 31, 2020, non-interest expenses increased by $2.8 million or 36.7% to $10.4 million compared to $7.6 million in the same period of 2019. Of this increase, $2.0 million was in net salaries and benefits expenses, the result of hiring key executive and support staff positions to support the Company’s expansion initiatives and continued growth. In addition, approximately $400 thousand was due to severance benefits related to the departure of an executive.

Operating expenses for the three months ended March 31, 2020 also included increases in professional and legal fees related to implementation of FDICIA and SEC compliance controls and processes and the registration of the Company’s common shares of $597 thousand; occupancy and equipment from the expansion of facilities of $393 thousand; and data processing costs related to enhancement of treasury management systems of $106 thousand.

Non-Interest Income and Expense – three months ended March 31, 2020 and December 31, 2019

During the three months ended March 31, 2020, non-interest income totaled $1.3 million, an increase of $144 thousand, or 12.6% over the three-month period ended December 31, 2019. The increase was primarily the result of increases in deposit service charges, loan fees and other miscellaneous income compared to the prior quarter.

During the three months ended March 31, 2020, total non-interest expenses increased by $582 thousand, or 5.9% to $10.4 million compared to $9.8 million for the fourth quarter of 2019. This increase primarily related to implementation of FDICIA and SEC compliance controls and processes and registration of the Company’s common shares. Salary and benefits expense increased $708 thousand and included approximately $400 thousand to accrue severance benefits and higher payroll taxes.

“For the past two quarters our operating results have been materially impacted by a push to achieve two significant milestones: implementation of FDICIA compliance controls and the public listing of our shares on Nasdaq,” said Thomas A. Sa, Senior Executive Vice President, Chief Financial Officer and Chief Operating Officer of California Ban Corp. “In the first quarter of 2020, the impact of nonrecurring expenses was approximately $1.5 million. As we transition from implementation to recurring compliance efforts, we expect expense levels to trend back to more normalized levels.”

Please see our detailed First Quarter 2020 Unaudited Summary Financial Statements for more information.

Closing Remarks

“At California BanCorp, our people remain healthy and engaged and though the vast majority are working from home, they continue to go above and beyond the call of duty. I am proud of the entrepreneurial spirit our people continue to demonstrate in order to develop unique solutions and get the job done for our clients in this challenging time,” concluded Steve A. Cortese, Chairman, California BanCorp.

Forward-Looking Information

Statements in this news release regarding expectations and beliefs about future financial performance and financial condition, as well as trends in the Company’s business and markets are “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements often include words such as “believe,” “expect,” “anticipate,” “intend,” “plan,” “estimate,” “project,” “outlook,” or words of similar meaning, or future or conditional verbs such as “will,” “would,” “should,” “could,” or “may.” The forward-looking statements in this news release are based on current information and on assumptions that the Company makes about future events and circumstances that are subject to a number of risks and uncertainties that are often difficult to predict and beyond the Company’s control. As a result of those risks and uncertainties, the Company’s actual financial results in the future could differ, possibly materially, from those expressed in or implied by the forward-looking statements contained in this news release and could cause the Company to make changes to future plans. Those risks and uncertainties include, but are not limited to, the risk of incurring loan losses, which is an inherent risk of the banking business; the risk that the Company will not be able to continue its internal growth rate; the risk that the United States economy will experience slowed growth or recession or will be adversely affected by domestic or international economic conditions and risks associated with the Federal Reserve Board taking actions with respect to interest rates, any of which could adversely affect, among other things, the values of real estate collateral supporting many of the Company’s loans, interest income and interest rate margins and, therefore, the Company’s future operating results; risks associated with changes in income tax laws and regulations; and risks associated with seeking new client relationships and maintaining existing client relationships. Readers of this news release are encouraged to review the additional information regarding these and other risks and uncertainties to which our business is subject that are contained in our Annual Report on Form 10-K for the year ended December 31, 2019 which is on file with the Securities and Exchange Commission (the “SEC”). Additional information will be set forth in our Quarterly Report on Form 10-Q for the three months ended March 31, 2020, which we expect to file with the SEC during the second quarter of 2020, and readers of this release are urged to review the additional information that will be contained in that report.

The COVID-19 pandemic has created economic and financial disruptions that have adversely affected, and may continue to adversely affect, our business, operations, financial performance and prospects. Even after the COVID-19 pandemic subsides, it is possible that the U.S. and other major economies experience or continue to experience a prolonged recession, which could materially and adversely affect our business, operations, financial performance and prospects. Statements about the effects of the COVID-19 pandemic on our business, operations, financial performance and prospects may constitute forward-looking statements and are subject to the risk that the actual impacts may differ, possibly materially, from what is

reflected in those forward-looking statements due to factors and future developments that are uncertain, unpredictable and in many cases beyond our control, including the scope and duration of the pandemic, actions taken by governmental authorities in response to the pandemic, and the direct and indirect impact of the pandemic on our customers, third parties and us.

Due to these and other possible uncertainties and risks, readers are cautioned not to place undue reliance on the forward-looking statements contained in this news release, which speak only as of today’s date, or to make predictions based solely on historical financial performance. The Company disclaims any obligation to update forward-looking statements contained in this news release, whether as a result of new information, future events or otherwise, except as may be required by law.

About California BanCorp

California BanCorp, the parent company for California Bank of Commerce, offers a broad range of commercial banking services to closely held businesses and professionals located throughout Northern California. The stock trades on the Nasdaq Global Select Market under the symbol CALB (formerly CABC). For more information on California BanCorp, call us at (510) 457-3751, or visit us at www.californiabankofcommerce.com.

California BanCorp

Steven E. Shelton, (510) 457-3751

President and Chief Executive Officer

seshelton@bankcbc.com

Thomas A. Sa, (510) 457-3775

Senior Executive Vice President

Chief Financial Officer and

Chief Operating Officer

tsa@bankcbc.com

Source: California BanCorp

California BanCorp Financial Data as of March 31, 2020 (Unaudited)

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California BanCorp Financial Data as of March 31, 2020 (Unaudited)

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California BanCorp Financial Data as of March 31, 2020 (Unaudited)

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