Table of Contents 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 March 31, 2025 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: 001-38149 RBB BANCORP (Exact name of registrant as specified in its charter) California 27-2776416 ...

Financial Data and Key Metrics Changes - First quarter net income declined to $2.3 million or $0.13 per share, primarily due to strategic actions taken to address non-performing assets [3] - Non-performing assets were reduced by 20% and net exposure to non-performing loans decreased by 32% to $51 million [3] - Net interest income before provisions increased for the third consecutive quarter to $26.2 million [8] - Net interest margin increased by 12 basis points to 2.88% due to a decline in the cost of interest-bearing deposits [6][10] Business Line Data and Key Metrics Changes - Loans held for investment grew by $90 million or 12% on an annualized basis, driven by growth in commercial, SBA, and SFR balances [5] - Total first quarter loan originations amounted to $201 million at a blended yield of 6.77% [6] - Non-interest income declined by $4.34 million to $2.3 million due to lower gains on the sale of loans [10] Market Data and Key Metrics Changes - Total deposits increased at an 8% annualized rate to $3.14 billion, with growth in money market accounts and CDs offsetting a decline in non-interest bearing accounts [13] - The loan portfolio yield remained stable at 6.03% [12] Company Strategy and Development Direction - The company is focusing on resolving non-performing loans quickly while minimizing the impact on earnings and capital [3] - There is an ongoing effort to reduce reliance on wholesale funding, with a successful CD campaign in the first quarter [46] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in resolving remaining non-performing assets and expects to report additional progress in upcoming quarters [4] - The company anticipates continued loan growth, albeit at a more moderate pace than the first quarter [6] - Management believes that by the second half of 2025, there could be a target for reducing non-performing loans to a normal baseline [54] Other Important Information - The company’s tangible book value per share increased to $24.63 [13] - Capital ratios remain strong, with all capital ratios above regulatory well-capitalized levels [14] Q&A Session Summary Question: Thoughts on potential share repurchase - Management recognizes that a buyback is one of the best uses of excess capital and is working to put a buyback in place [19] Question: Dynamics within the margin and FHLB advances - The FHLB advances are fully priced into the March net interest margin, and the net interest margin is slightly below the quarter's average [21] Question: Margin drag from non-accrual loans - There is a drag on net interest margin from non-accrual loans, with $20 million potentially returning to accrual status [24] Question: Appetite for more problem loan sales - Management is open to sales but believes they are well reserved for future write-offs [29] Question: Exposure to tariff impacts - Management has reached out to top customers and does not observe any potential financial impact from tariffs at this time [34] Question: Loan growth expectations and deposit trends - Management expects to fund loan growth organically and noted some migration into higher-yielding products [46] Question: Non-interest expenses outlook - Management estimates operating expenses to be around $17.5 million to $18 million, with some moderation expected [66]

Financial Data and Key Metrics Changes - First quarter net income declined to $2,300,000 or $0.13 per share, primarily due to strategic actions taken to address non-performing assets [3] - Non-performing assets were reduced by 20% and net exposure to non-performing loans decreased by 32% to $51,000,000 [3] - Net interest income before provisions increased for the third consecutive quarter to $26,200,000 [9] - Net interest margin increased by 12 basis points to 2.88% due to a decline in the cost of interest-bearing deposits [7][9] Business Line Data and Key Metrics Changes - Loans held for investment grew by $90,000,000 or 12% on an annualized basis, driven by growth in commercial, SBA, and SFR balances [5] - Total first quarter loan originations amounted to $201,000,000 at a blended yield of 6.77% [6][7] - Non-interest income declined by $4,340,000 to $2,300,000 due to lower gains on the sale of loans [10] Market Data and Key Metrics Changes - Total deposits increased at an 8% annualized rate to $3,140,000,000, with growth in money market accounts and CDs offsetting a decline in non-interest bearing accounts [14] - The loan portfolio yield remained stable at 6.03% [11] Company Strategy and Development Direction - The company is focusing on resolving non-performing loans quickly while minimizing the impact on earnings and capital [3] - There is an ongoing effort to implement a share repurchase program as capital ratios are strong and the current share price is attractive [20] - The company aims to continue loan growth, albeit at a more moderate pace than the first quarter [7] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in resolving remaining non-performing assets and expects to report additional progress in upcoming quarters [4] - The company anticipates that lower future provisions and redeployment of capital will lead to increasing net interest income after provisions [9] - Management acknowledged the uncertainty surrounding the tariff situation but reported no immediate financial impact from their top customers [36] Other Important Information - The company’s tangible book value per share increased to $24.63 [14] - Capital ratios remain strong, with all ratios above regulatory well-capitalized levels [15] Q&A Session Summary Question: Thoughts on potential share repurchase - Management recognizes that a buyback is one of the best uses of excess capital and is working to implement it [20] Question: Dynamics within the margin and FHLB advances - The FHLB advances are fully priced into the March net interest margin, and the net interest margin is slightly below the quarter's average [22] Question: Margin drag from non-accrual loans - There is a drag on net interest margin from non-accrual loans, with potential recoveries being considered [25] Question: Loan growth expectations and deposit trends - Management expects to fund loan growth organically and noted some migration from non-interest bearing deposits to higher-yielding products [49] Question: Time frame for resolving non-performing loans - Management believes that by the second half of 2025, there could be significant progress in reducing non-performing loans [56] Question: Composition of the loan growth pipeline - The pipeline is primarily composed of CRE loans and single-family residences, with C&I loans expected to contribute more as new hires come online [63]

Financial Data and Key Metrics Changes - First quarter net income declined to $2,300,000 or $0.13 per share, primarily due to strategic actions taken to address non-performing assets [3] - Non-performing assets were reduced by 20% and net exposure to non-performing loans decreased by 32% to $51,000,000 [3][4] - Net interest income before provisions increased for the third consecutive quarter to $26,200,000 [9] - Net interest margin increased by 12 basis points to 2.88%, driven by a decline in the cost of interest-bearing deposits [7][9] Business Line Data and Key Metrics Changes - Loans held for investment grew by $90,000,000 or 12% on an annualized basis, with strong results from commercial, SBA, and SFR balances [5][6] - Total first quarter loan originations reached $201,000,000 at a blended yield of 6.77% [6] - Non-interest income declined by $4,340,000 to $2,300,000 due to lower gains on the sale of loans [10] Market Data and Key Metrics Changes - Total deposits increased at an 8% annualized rate to $3,140,000,000, with growth in money market accounts and CDs [13] - The ratio of allowance for loan losses to total loans held for investments increased by nine basis points to 1.65% [13] Company Strategy and Development Direction - The company is focusing on resolving non-performing loans quickly while minimizing the impact on earnings and capital [3] - There is an ongoing effort to redeploy capital previously tied up in non-performing assets to increase net interest income in the coming quarters [9] - The company aims to be the bank of choice for Asian Americans nationwide, with a commitment to addressing challenges faced in recent years [15] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in resolving remaining non-performing assets and expects to report additional progress in upcoming quarters [4] - The company anticipates continued loan growth, albeit at a more moderate pace than the first quarter [7] - Management acknowledged the uncertainty surrounding tariffs but reported no immediate financial impact from current trade dynamics [34][56] Other Important Information - The company has strong capital ratios, with all capital ratios above regulatory well-capitalized levels [14] - The tangible book value per share increased to $24.63 [13] Q&A Session Summary Question: Thoughts on potential share repurchase - Management recognizes that a buyback is one of the best uses of excess capital and is working to implement it [19] Question: Dynamics within the margin and FHLB roll - The FHLB advances are fully priced into the March net interest margin, and the net interest margin is slightly below the quarter's average [21] Question: Margin drag from non-accruals - There is a drag on net interest margin from non-accrual loans, with potential recoveries being considered [24] Question: Loan growth expectations and deposit trends - Management expects to fund loan growth organically and noted a seasonal decline in non-interest bearing deposits [46] Question: Composition of the loan growth pipeline - The pipeline is primarily composed of CRE loans and single-family residences, with C&I loans expected to contribute more in the future [61]

Financial Performance - Diluted Earnings Per Share (EPS) decreased to $0.13 in 1Q25 [6], compared to $0.39 in 2Q24 [6] - Net income decreased to $2290 thousand in 1Q25 [6], compared to $7245 thousand in 2Q24 [6] - The efficiency ratio increased to 6509% in 1Q25 [6], compared to 6238% in 2Q24 [6] - Return on Average Assets decreased to 024% in 1Q25 [6], compared to 076% in 2Q24 [6] Balance Sheet & Capital - Gross Loans Held for Investment (HFI) increased to $3143063 thousand in 1Q25 [6], compared to $3047712 thousand in 2Q24 [6] - Total Deposits increased to $3142628 thousand in 1Q25 [6], compared to $3023605 thousand in 2Q24 [6] - Common Equity Tier 1 (CET1) Ratio decreased to 1787% in 1Q25 [6], compared to 1889% in 2Q24 [6] Asset Quality - Non-Performing Loans (NPLs) decreased to $60380 thousand in 1Q25 [6], compared to $81038 thousand in 4Q24 [6] - NPLs/Total Loans decreased to 192% in 1Q25 [6], compared to 264% in 4Q24 [6] - NPAs decreased by $165 million, or 20% [7, 31]

RBB (RBB) reported $28.46 million in revenue for the quarter ended March 2025, representing a year-over-year increase of 0.7%. EPS of $0.13 for the same period compares to $0.43 a year ago.The reported revenue represents a surprise of -1.11% over the Zacks Consensus Estimate of $28.78 million. With the consensus EPS estimate being $0.38, the EPS surprise was -65.79%.While investors closely watch year-over-year changes in headline numbers -- revenue and earnings -- and how they compare to Wall Street expecta ...

Exhibit 99.1 RBB Bancorp Reports First Quarter 2025 Earnings Los Angeles, CA, April 28, 2025 – RBB Bancorp (NASDAQ:RBB) and its subsidiaries, Royal Business Bank (the "Bank") and RBB Asset Management Company ("RAM"), collectively referred to herein as the "Company," announced financial results for the quarter ended March 31, 2025. First Quarter 2025 Highlights Net interest income was $26.2 million for the first quarter of 2025, compared to $26.0 million for the fourth quarter of 2024. The $186,000 increase ...

Core Viewpoint - RBB reported quarterly earnings of $0.13 per share, significantly missing the Zacks Consensus Estimate of $0.38 per share, marking a 65.79% earnings surprise to the downside [1]. Financial Performance - The company posted revenues of $28.46 million for the quarter ended March 2025, which was 1.11% below the Zacks Consensus Estimate and a slight increase from $28.25 million a year ago [2]. - Over the last four quarters, RBB has surpassed consensus EPS estimates two times and topped consensus revenue estimates two times [2]. Stock Performance - RBB shares have declined approximately 22.8% since the beginning of the year, contrasting with the S&P 500's decline of 6.1% [3]. - The current Zacks Rank for RBB is 4 (Sell), indicating expectations of underperformance in the near future [6]. Earnings Outlook - The current consensus EPS estimate for the upcoming quarter is $0.39 on revenues of $29.14 million, and for the current fiscal year, it is $1.60 on revenues of $118.77 million [7]. - The trend for estimate revisions ahead of the earnings release was unfavorable, which may impact future stock performance [6]. Industry Context - The Banks - West industry, to which RBB belongs, is currently ranked in the bottom 33% of over 250 Zacks industries, suggesting potential challenges for stock performance [8].

Core Points - RBB Bancorp reported a net income of $2.3 million, or $0.13 diluted earnings per share, for Q1 2025, a decline from $4.4 million, or $0.25 per share, in Q4 2024 [3][8] - The decline in net income was attributed to a $6.7 million pre-tax provision for credit losses, primarily aimed at reducing exposure to nonperforming loans [3][4] - The company reduced its net exposure to nonperforming loans by 32% since year-end, bringing it down to $51 million [4] Financial Performance - Net interest income for Q1 2025 was $26.2 million, slightly up from $26.0 million in Q4 2024, driven by a decrease in interest expense [5][8] - The net interest margin (NIM) increased to 2.88% in Q1 2025, up from 2.76% in Q4 2024, due to a decrease in the overall cost of funds [6][8] - Noninterest income decreased to $2.3 million in Q1 2025 from $2.7 million in Q4 2024, mainly due to lower net gains on loan sales [11][8] Credit Quality - Nonperforming assets decreased by $16.5 million, or 20.3%, to $64.6 million at the end of Q1 2025 [8][17] - The provision for credit losses was $6.7 million in Q1 2025, compared to $6.0 million in Q4 2024, reflecting an increase in specific reserves [10][8] - The allowance for loan losses as a percentage of loans held for investment increased to 1.65% at March 31, 2025, from 1.56% at December 31, 2024 [20][8] Balance Sheet - Total assets increased to $4.0 billion as of March 31, 2025, a $16.9 million increase from December 31, 2024 [13][8] - Loans held for investment totaled $3.1 billion, reflecting a 12% annualized growth compared to the previous quarter [14][8] - Total deposits rose to $3.1 billion, an increase of $58.8 million, or 7.7% annualized, from the previous quarter [16][8] Shareholders' Equity - Total shareholders' equity was $510.3 million at March 31, 2025, a $2.4 million increase from December 31, 2024 [23][8] - Book value per share increased to $28.77, and tangible book value per share rose to $24.63 as of March 31, 2025 [8][23]

Core Viewpoint - RBB Bancorp will release its financial results for the first quarter ended March 31, 2025, on April 28, 2025, after market close [1] Financial Results Announcement - A conference call to discuss the financial results will be held on April 29, 2025, at 11:00 a.m. Pacific Time [2] - Interested parties can listen to the call by dialing specific numbers or via a live webcast on the Company's website [3] Corporate Overview - RBB Bancorp is a community-based financial holding company headquartered in Los Angeles, California, with total assets of $4.0 billion as of December 31, 2024 [4] - The wholly-owned subsidiary, Royal Business Bank, provides a range of banking services primarily to Asian-centric communities across various locations in California, Nevada, New York, New Jersey, Illinois, and Hawaii [4] - The Bank operates multiple branches across these regions, including nine in Los Angeles County and additional branches in other states [4]