#1trico bancshares Investor Presentation Fourth Quarter 2023 Richard P. Smith, President & Chief Executive Officer Dan K. Bailey, EVP & Chief Banking Officer John S. Fleshood, EVP & Chief Operating Officer Peter G. Wiese, EVP & Chief Financial Officer#2Safe Harbor Statement The statements contained herein that are not historical facts are forward-looking statements based on management's current expectations and beliefs concerning future developments and their potential effects on the Company. Such statements involve inherent risks and uncertainties, many of which are difficult to predict and are generally beyond our control. We caution readers that a number of important factors could cause actual results to differ materially from those expressed in, or implied or projected by, such forward-looking statements. These risks and uncertainties include, but are not limited to, the following: the conditions of the United States economy in general and the strength of the local economies in which we conduct operations; the impact of any future federal government shutdown and uncertainty regarding the federal government's debt limit or changes in, trade, monetary and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System; the impacts of inflation, interest rate, market and monetary fluctuations on the Company's business condition and financial operating results; the impact of changes in financial services industry policies, laws and regulations; regulatory restrictions affecting our ability to successfully market and price our products to consumers; the risks related to the development, implementation, use and management of emerging technologies, including artificial intelligence and machine learning; extreme weather, natural disasters and other catastrophic events that may or may not be caused by climate change and their effects on the Company's customers and the economic and business environments in which the Company operates; the impact of a slowing U.S. economy and decreases in housing and commercial real estate prices, potentially increased unemployment on the performance of our loan portfolio, the market value of our investment securities and possible other-than-temporary impairment of securities held by us due to changes in credit quality or rates; the availability of, and cost of, sources of funding and the demand for our products; adverse developments with respect to U.S. or global economic conditions and other uncertainties, including the impact of supply chain disruptions, commodities prices, inflationary pressures and labor shortages on the economic recovery and our business; the impacts of international hostilities, wars, terrorism or geopolitical events; adverse developments in the financial services industry generally such as the recent bank failures and any related impact on depositor behavior or investor sentiment; risks related to the sufficiency of liquidity; the possibility that our recorded goodwill could become impaired, which may have an adverse impact on our earnings and capital; the costs or effects of mergers, acquisitions or dispositions we may make, as well as whether we are able to obtain any required governmental approvals in connection with any such activities, or identify and complete favorable transactions in the future, and/or realize the anticipated financial and business benefits; the regulatory and financial impacts associated with exceeding $10 billion in total assets; the negative impact on our reputation and profitability in the event customers experience economic harm or in the event that regulatory violations are identified; the ability to execute our business plan in new markets; the future operating or financial performance of the Company, including our outlook for future growth and changes in the level and direction of our nonperforming assets and charge-offs; the appropriateness of the allowance for credit losses, including the assumptions made under our current expected credit losses model; any deterioration in values of California real estate, both residential and commercial; the effectiveness of the Company's asset management activities managing the mix of earning assets and in improving, resolving or liquidating lower-quality assets; the effect of changes in the financial performance and/or condition of our borrowers; changes in accounting standards and practices; changes in consumer spending, borrowing and savings habits; our ability to attract and maintain deposits and other sources of liquidity; the effects of changes in the level or cost of checking or savings account deposits on our funding costs and net interest margin; increasing noninterest expense and its impact on our financial performance; competition and innovation with respect to financial products and services by banks, financial institutions and non-traditional competitors including retail businesses and technology companies; the challenges of attracting, integrating and retaining key employees; the vulnerability of the Company's operational or security systems or infrastructure, the systems of third-party vendors or other service providers with whom the Company contracts, and the Company's customers to unauthorized access, computer viruses, phishing schemes, spam attacks, human error, natural disasters, power loss and data/security breaches and the cost to defend against and respond to such incidents; the impact of the recent cyber security ransomware incident on our operations and reputation; increased data security risks due to work from home arrangements and email vulnerability; failure to safeguard personal information, and any resulting litigation; the effect of a fall in stock market prices on our brokerage and wealth management businesses; the transition from the LIBOR to new interest rate benchmarks; the emergence or continuation of widespread health emergencies or pandemics; the costs and effects of litigation and of unexpected or adverse outcomes in such litigation; and our ability to manage the risks involved in the foregoing. There can be no assurance that future developments affecting us will be the same as those anticipated by management. Additional factors that could cause results to differ materially from those described above can be found in our Annual Report on Form 10-K for the year ended December 31, 2022, which has been filed with the Securities and Exchange Commission (the "SEC") and all subsequent filings with the SEC under Sections 13(a), 13(c), 14, and 15(d) of the Securities Act of 1934, as amended. Such filings are also available in the "Investor Relations" section of our website, https://www.tcbk.com/investor- relations and in other documents we file with the SEC. Annualized, pro forma, projections and estimates are not forecasts and may not reflect actual results. We undertake no obligation (and expressly disclaim any such obligation) to update or alter our forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law. 2 Investor Presentation | Fourth Quarter 2023 trico bancshares#3Tri Counties Bank SACRAMENTO BUSINESS JOURNAL C-SUITE AWARDS Featuring CFO of the Year TA Sacramento Business Journal C-Suite Awards: Daniel Bailey, CBO 2023 INTERPENE RECORD'S #1 Readers' Choice of 2023 Chico Enterprise Record Best Bank 2019-2023 Top 50 Community Banks 2023 MOST ADMIRED S&P Global Market Intelligence S&P Global Market Intelligence #10 Community Bank with $3-10 billion in assets 2023 Best CN&R FIRST PLACE 23 Chico News & Review Best Bank 2008-2019, 2022, 2023 CEOs SACRAMENTO BUSINESS JOURNAL Sacramento Business Journal Most Admired CEOs: Rick Smith, President and CEO 2023 Favorite 2023 Marysville Appeal Democrat Favorite Bank 2019, 2021-2023 $23** STYLE READERS CHOICE AWARDS Wylong.com WINNER Style Magazine Roseville, Granite Bay & Rocklin Readers' Choice 2011-2023 Habitat for Humanity of Greater Sacramento Habitat for Humanity of Greater Sacramento Hammy Award: Finance Partner 2022 alifornia Black Califo hamber of Commerce "Dedicated to Economic Empowerment California Black Chamber of Commerce Top Partner Award 2023 SACRAMENTO BUSINESS JOURNAL CORPORATE CITIZENSHIP 2022 Sacramento Business Journal Corporate Citizenship: Corporate Champion for Basic Needs | 2022 RAYMOND JAMESⓇ Raymond James Community Bankers Cup Award Top 10% of Community Banks 2019-2022 The Union's 2022 Best Nevada County Grass Valley Union Best of Nevada County 2011-2022 Auburn Journals 2022 BEST BEST Auburn Auburn Journal Best Bank 2019-2022 Forbes Forbes Magazine Best-In-State Bank 2021 Practically Genius Awards Creative Digital Innovation of the Year Practically Genius Awards Creative Digital Innovation of the Year 2021 3 Investor Presentation | Fourth Quarter 2023 trico bancshares#4trecounties back . Agenda Most Recent Quarter Recap • Company Overview • Lending Overview . Deposit Overview Financials Executive Team (left to right) Judi Giem, SVP & Chief Human Resources Officer Peter Wiese, EVP & Chief Financial Officer Dan Bailey, EVP & Chief Banking Officer Rick Smith, President & Chief Executive Officer John Fleshood, EVP & Chief Operating Officer Craig Carney, EVP & Chief Credit Officer Investor Presentation | Fourth Quarter 2023 Greg Gehlmann, SVP & General Counsel trico bancshares#5LO 5 Most Recent Quarter Highlights Operating Leverage and Profitability Net Interest Income and Margin Balance Sheet Management Liquidity • • • • • Credit Quality • • Diverse Deposit Base . • Capital Strategies • Pre-tax pre-provision ROAA and ROAE were 1.70% and 15.32%, respectively, for the quarter ended December 31, 2023, and 2.21% and 21.59%, respectively, for the same quarter in the prior year Our efficiency ratio was 58.7% for the quarter ended December 31, 2023, compared to 55.6% and 51.8% for the quarters ended September 30, 2023 and December 31, 2022, respectively Net interest margin (FTE) of 3.81%, compared to 3.88% in the trailing quarter, and 4.34% in the quarter ended December 31, 2022, was influenced by the rising rate environment and balance sheet augmentation Average yield on earning assets (FTE) of 5.10% was 16 basis points higher than the 4.94% in the trailing quarter, while the cost of interest-bearing liabilities increased 30 basis points to 2.01% from 1.71% Total loans grew by an annualized 5.1% while deposits declined by an annualized 8.8% Loan to deposit ratio has grown to 86.7% at December 31, 2023 compared to 77.4% a year ago Cash flows generated from investment securities were elevated during the current quarter with the sale of available-for-sale investment securities resulting in a pre-tax realized loss of $120,000 and an expected earn back period of less than 9-months Readily available and unused funding sources, which total approximately $3.9 billion and represent 50% of total deposits and 166% of total estimated uninsured deposits. No reliance on brokered deposits or FRB borrowing facilities during the 2023 or 2022 The allowance for credit losses to total loans was 1.79% as of December 31, 2023, compared to 1.73% as of September 30, 2023, and 1.64% as of December 31, 2022 We remain proactive in our approach to our allowance and the management of our loan portfolio but are not seeing systemic weakness and overall levels of non-performing loans remain historically low Overall portfolio credit trends remain below historic averages with loans past due 30+ days to total loans remaining less than 0.30% at quarter end Non-interest-bearing deposits comprised 34.8% of total deposits Deposit betas remain low with a cycle-to-date deposit beta of 19.2% • Quarterly dividend of $0.30 or $1.20 annually Approximately 1.2 million shares remain as being authorized for repurchase Tangible capital ratio of 8.8% at December 31, 2023, an increase from 7.9% at September 30, 2023, due to both the retention of earnings as well as a reduction in the level of unrealized losses on A-F-S securities Strength in core earnings is key to self-financed and self-funded growth All regulatory capital ratios have grown year-over-year Investor Presentation | Fourth Quarter 2023 trico bancshares#6Company Overview Crescent City McKinleyville Eureka Fortuna Weaverville Hayfork Yreka Redding (4 branches) Anderson Cottonwood Red Bluff Weed Mt. Shasta Fall River Mills Burney Shasta Lake Palo Cedro Chico (4 branches) Paradise Oroville Covelo Orland Durham Willows Willits Nevada City Colusa Grass Valley (2 branches Yuba City Marysville Auburn Woodland Middletown Roseville (2 branches) Folsom Sacramento (2 branches) Santa Rosa Regions Northern Greater Chico Sacramento Valley Central Valley Bay Area Commercial Banking Centers Branch locations as of September 2023 Nasdaq: Headquarters: Stock Price*: TCBK Chico, California $42.97 Market Cap.: $1.43 Billion Asset Size: $9.91 Billion Loans: $6.79 Billion Deposits: $7.83 Billion Bank Branches: 69 O Visalia Delano Bakersfield (3 branches) ATMs: Market Area: 86 Bank ATMs, with 2 access to 40,000 in network TriCo currently serves 31 counties throughout California Brentwood San Rafael Modesto Walnut Creek San Francisco (4 branches) Daly City Pacifica Patterson Gustine Turlock Chowchilla Half Moon Bay South San Francisco Millbrae O San Mateo Pescadero Redwood City San Jose Fresno 60 As of close of business December 31, 2023 Los Angeles/Pasadena Irvine Investor Presentation | Fourth Quarter 2023 San Diego trico bancshares#7"Recurring Critical and Strategic Themes Noted in Recent Executive Discussions" Continued Identification and Acquisition of New Customer Relationships While Expanding Services to Existing Customers - A Holistic Understanding of Their Balance Sheet and Ours Capital - Balance of Regulatory and Shareholder Expectations - Scaling and Leverage – Meticulously Patient in Finding the Right Partner at the Right Time to Cross $10 Billion in Total Assets Rationalization of Operating Costs Through the Relentless Pursuit of Redundant Expenses / Overlapping Vendor Services and Partially Implemented Technologies Regulatory Focus Areas - Compliance (Including CRA & ESG) Data Governance and the Hurdles Associated with Merger Approvals Active Monitoring of Loans for Early Warning Signs of Credit Deterioration and the Impact of Actual or Potential Global Events on Local Markets 7 Investor Presentation | Fourth Quarter 2023 trico bancshares#8Earnings (in Millions) Positive Earnings Track Record $40 $36 $32 $28 $24 $20 $16 $12 $8 $4 $0 July 2018 Acquired FNB Bancorp ($1.2B assets) 2020 Elevated ACL Provisioning Associated with COVID Related Risks March 2022 Acquired Valley Republic Bancorp ($1.4B assets) $1.20 Q1'18 Q2'18 Q3'18 Q4'18 Q1'19 Q2'19 Q3'19 Q4'19 Q1'20 Q2'20 Q3'20 Q4'20 Q1'21 Q2'21 Q3'21 Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Net Income ($MM) $13.9 $15.0 $16.2 $23.2 $22.7 $23.1 $23.4 $22.9 $16.1 $7.4 $17.6 $23.6 $33.6 $28.4 $27.4 $28.2 $20.4 $31.4 $37.3 $36.3 $35.8 $24.9 $30.6 $26.1 Qtrly Diluted EPS $0.60 $0.65 $0.53 $0.76 $0.74 $0.75 $0.76 $0.75 $0.53 $0.25 $0.59 $0.79 $1.13 $0.95 $0.92 $0.94 $0.67 $0.93 $1.12 $1.09 $1.07 $0.75 $0.92 $0.78 8 Investor Presentation | Fourth Quarter 2023 $0.80 $0.40 $0.00 trico bancshares Qtrly EPS (diluted)#9Shareholder Returns Dividends per Share: 11.4% CAGR* Return on Avg. Shareholder Equity $1.20 ■Q1 ■ Q2 ■Q3 ■Q4 $1.10 $1.00 10.75% 10.49% 12.10% 11.67% 10.65% $0.30 $0.88 $0.82 $0.30 $0.25 8.10% $0.66 $0.70 7.18% $0.22 $0.30 $0.22 $0.17 $0.19 $0.25 $0.30 $0.22 $0.22 $0.17 $0.17 $0.30 $0.17 $0.17 $0.19 $0.22 $0.25 $0.25 $0.15 $0.17 $0.19 $0.22 $0.25 $0.25 $0.30 2017 2018 2019 2020 2021 2022 2023 2017 2018 2019 2020 2021 2022 2023 Dividends as % of Earnings Diluted EPS 37% 27% 27% 41% ساس ■Q1 ■Q2 Q3 ■Q4 $3.94 $3.83 34% $3.52 29% $3.00 $0.94 $1.09 25% $0.78 $2.54 $0.75 $2.16 $0.92 $1.74 $0.76 $0.92 $1.12 $0.76 $0.79 $0.53 $0.95 $0.51 $0.75 $0.75 $0.59 $0.93 $0.65 $0.58 $0.25 $1.13 $1.07 $0.52 $0.60 $0.74 $0.53 $0.67 2017 2018 2019 2020 2021 2022 2023 2017 2018 2019 2020 2021 2022 2023 Compound Annual Growth Rate, 5 years 9 Investor Presentation | Fourth Quarter 2023 trico bancshares#10Consistent Growth Organic Growth and Disciplined Acquisitions. 10 ■■Organic Acquired March 2022 Acquired Valley Republic ($1.4B assets) July 2018 Acquired FNB Bancorp ($1.2B assets) March 2016 Acquired 3 BofA Branches ($164MM assets) January 2014 Acquired North Valley Bank ($931MM assets) $2.7 2013 $4.8 $4.5 $4.2 $3.9 2014 $6.4 $6.5 $7.6 $8.6 2015 2016 2017 2018 2019 2020 2021 Asset Dollars in Billions. Investor Presentation | Fourth Quarter 2023 CAGR, Assets 10 yrs. 5 yrs. 9.2% 13.6% $9.9 $9.8 $9.9 $9.9 $9.9 2022 Q1 2023 Q2 2023 Q3 2023 Q4 2023 Trailing 10 years Trailing 4 quarters trico bancshares#1111 Deposits Investor Presentation | Fourth Quarter 2023 trico bancshares#1212 Investor Presentation | Fourth Quarter 2023 Interest-bearing Demand & Savings Deposits, 50.4% Liability Mix: Strength in Funding Time Deposits, 8.0% Liability Mix 12/31/2023 Borrowings & Subordinated Debt, 8.4% Loans to Core Deposits (%) Other liabilities, 2.1% TCBK ◆ Peers 120 100 80 60 72.6 71.8 40 Non Interest- bearing Demand Deposits, 31.1% 20 0 40 30 20 320 39.7 40.3 Total Deposits = $7.83 billion 91.4% of Funding Liabilities 10 0 2020 2021 2021 2021 2021 2022 2022 2022 2022 2023 2023 2023 2023 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Peer group consists of 99 closest peers in terms of asset size, range $4.7-11.5 Billion; source: BankRegData.com Net Loans includes LHFS and Allowance for Credit Loss; Core Deposits = Total Deposits less CDs > 250k and Brokered Deposits trico bancshares 40.7 40.7 40.4 2020 2021 2021 2021 2021 2022 2022 2022 2022 2023 2023 2023 2023 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Non Interest-bearing Deposits as % of Total Deposits TCBK Peers 41.1 41.2 42.5 42.0 40.3 38.0 35.7 34.8 87.7#13Deposits: Strength in Cost of Funds Relationship focused pricing for retention and acquisition ➤ Continued best in class total deposit Beta, 19.2% cycle to date $8,714 $8,757 $8,656 $8,329 $8,026 $8,095 $8,010 $7,834 $7,367 $7,237 $6,992 $6,863 $3,583 $3,604 $6,506 $3,678 $3,502 $3,073 $2,858 $3,237 $2,723 13 $2,980 $2,943 $2,767 $2,844 $2,582 $4,783 $4,825 $4,530 $4,564 $4,414 $4,674 $4,603 $4,443 $3,580 $3,769 $3,824 $3,967 $4,090 $345 $328 $324 $327 $298 $349 $327 $304 $224 $346 $492 $588 $697 Cost of Deposits Q4'20 Q1'21 Q2'21 Q3'21 Q4'21 Q1'22 Q2'22 Q3'22 Q4'22 Q1'23 Q2'23 Q3'23 Q4'23 Noninterest-Bearing Demand Int-Bearing Demand & Savings 0.05% 0.04% 0.04% 0.05% 0.03% 0.04% 0.05% 0.07% 0.17% 0.39% 0.83% 1.17% 1.36% Time Deposits 0.68% 0.64% 0.55% 0.52% 0.45% 0.36% 0.26% 0.23% 0.32% 0.89% 2.21% 2.92% 3.38% Total Deposits 0.07% 0.06% 0.05% 0.05% 0.04% 0.04% 0.04% 0.04% 0.10% 0.25% 0.58% 0.86% 1.05% Interest-bearing Deposits 0.12% 0.10% 0.08% 0.08% 0.06% 0.06% 0.07% 0.08% 0.18% 0.43% 0.95% 1.36% 1.62% Balances presented in millions, end of period Investor Presentation | Fourth Quarter 2023 trico bancshares#14Deposits by Region Crescent City McKinleyville Eureka Fortuna Weaverville Hayfork Willits Yreka Redding (4 branches) Anderson Cottonwood Red Bluff Weed Mt. Shasta Fall River Mills Burney Shasta Lake Palo Cedro Chico (4 branches) Paradise Covelo Orland Durham Willows Oroville Nevada City Colusa Yuba City Marysville Auburn Woodland Middletown Santa Rosa Grass Valley (2 branches) Roseville (2 branches) Folsom Sacramento (2 branches) Regions Northern Greater Chico Sacramento Valley Central Valley Bay Area Commercial Banking Centers Branch locations as of September 2023 Brentwood San Rafael Modesto Walnut Creek San Francisco (4 branches) Daly City Pacifica Patterson Gustine Turlock Chowchilla South San Francisco Millbrae O San Mateo Half Moon Bay Pescadero Redwood City San Jose ➤ Excludes bank owned operational deposits, public funds, and Direct Banking division. ➤ CD Balances added Q4-2024 to Regional pools. Fresno O Visalia Delano Bakersfield (3 branches) Los Angeles/Pasadena Irvine 14 Investor Presentation | Fourth Quarter 2023 San Diego Bay Area Central Valley Greater Chico Sacramento Valley Northern $0-$100k >$100k-$250k $250k - $500k $500k - $1min $1.218 billion, total >$1min Prior Quarter $589 $815 $288 $151 $88 $102 $2.292 billion, total $495 $307 $205 $1.258 billion, total $411 $281 $237 $190 $139 $1.536 billion, total $253 $218 $197 $198 $0.977 billion, total $219 $191 $145 $0-$100k $130 >$100k-$250k $250k - $500k $500k - $1mln >$1mln $292 $670 trico bancshares $470#15Deposits: Demand & Savings Deposit Mix Total Demand & Savings ($ millions exterior, count interior) Balance Tier, $ millions [1] Consumer ■Business Prior Quarter, Total # 35,031 Business $3,169 Consumer $3,523 #201,891 1,563 837 469 280 483 455 428 437 374 1,366 Business # of Accounts $0-$100k 29,785 >$100k-$250k 2,876 Avg Bal/Account ($000s) $16 Consumer $0-$100k $158 >$100k-$250k # of Accounts 194,396 5,503 >$250K-$500k 1,231 $347 >$250k-$500k 1,395 >$500k-$1 min >$1 min 639 $683 500 $2,733 >$500k-$1 mln >$1 mln 419 Avg Bal/Account ($000s) $8 $152 $337 $668 178 $2,101 [1] Excludes time deposits, bank owned operational deposits and public funds. 15 Investor Presentation | Fourth Quarter 2023 trico bancshares#16Liquidity ➤In addition to a strong deposit base, the bank maintains a variety of easily accessible funding sources Pledged Securities as % of Total Securities [3] 55.9 55.3 50.4 39.6 40.1 37.5 37.2 35.7 34.2 37.1 36.3 35.7 TCBK Peers 30.8 25.2 21.5 21.9 19.0 17.6 18.6 19.8 21.8 22.8 25.3 25.3 25.3 Liquidity Sources [1] 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 $51 $1,559 $4.5 Billion 191% of estimated uninsured Insured Deposits as % of Total Deposits [2][3] 73.2 72.7 72.5 71.2 70.3 TCBK Peers 71.2 70.1 69.8 68.9 67.6 66.3 66.3 66.5 68.8 68.5 68.3 deposits $2,922 64.9 63.8 63.6 63.7 64.0 62.8 62.8 62.9 62.3 ■Total Borrow Capacity Unpledged Securities AFS = Cash [1]$ millions, as of 12/31/2023, cash based upon total held at or in transit with FRB 4Q20 1Q21 2Q21 3Q21 4Q21 1Q22 2Q22 3Q22 4Q22 1Q23 2Q23 3Q23 4Q23 [2] Based upon estimated uninsured deposits reported in Call Report schedule RC-O includes demand and time deposits [3] Peer group consists of closest 99 peers in terms of assets, sourced from BankRegData.com 16 Investor Presentation | Fourth Quarter 2023 trico bancshares#1717 Loans and Credit Quality Investor Presentation | Fourth Quarter 2023 trico bancshares#18Loan Portfolio and Yield $4,859 5.44% $4,711 $4,739 $4,610 5.24% $4,022 $4,381 $4,386 $4,407 $4,443 $4,111 5.15% 5.09% 5.23% 4.92% 4.96% 5.05% 2018 4.86% 4.78% $6,795 $6,709 $6,521 $6,452 $6,422 $6,313 $6,097 $5,796 4.88% 4.73% 4.69% 5.64% 5.52% 5.38% 5.21% 5.10% 2019 Q1 2020 Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 Q3 2021 Q4 2021 Q1-2022 Q2-2022 Q3-2022 Q4-2022 Q1-2023 Q2-2023 Q3-2023 Q4-2023 Non-PPP PPP Loans Loan Yield Loan Yield Excl PPP Q1 2021 increase includes $98MM Jumbo Mortgage pool purchase End of period balances are presented net of fees and include LHFS. Yields based on average balance and annualized quarterly interest income. Acquired VRB Loans of $795MM upon 3/25/2022 with a WAR of 4.31%. 18 Investor Presentation | Fourth Quarter 2023 trico bancshares#19Gross Production vs. Payoff In addition to the nearly $0.8 billion in non-PPP loan originations in 2020, TCBK originated over $0.4 billion in PPP loans. TCBK originated nearly $1.5 billion in 2021, while facing headwinds of an increased $372 million in payoffs during 2021. Originations and net loan growth in 2022 were supportive of the positive mix shift in earning assets and facilitated both NII and NIM expansion. Slower pace of originations commensurate with market rate changes, liquidity management, and NIM preservation. " $6 $6 $33 $42 $4 $22 $36 $178 $199 $165 $250 $464 $285 $303 $412 $396 $473 $446 $250 $159 $170 $247 $193 -$118 -$139 -$131 -$20 -$56 -$166 -$47 -$192 -$205 -$225 -$241 -$59 -$243 -$250 -$270 -$33 -$47 Q1-2020 Q2-2020 Q3-2020 Q4-2020 Q1-2021 -$92 -$83 -$110 -$107 -$110 -$4 -$94 Q2-2021 Q3-2021 Q4-2021 Q1-2022 Q2-2022 Q3-2022 Q4-2022 Q1-2023 Q2-2023 Q3-2023 Q4-2023 ■Balance Change net of Originations and Payoffs ■Payoffs ■Origination Outstanding Principal in Millions, excludes PPP Includes Q1 2021 increase of $98MM and Q4 2020 increase of $40MM in Jumbo Mortgage pool purchases $800MM in outstanding at close of Q1-2022 related to VRB Acquisitions ($795MM at acquisition) excluded from the chart 19 Investor Presentation | Fourth Quarter 2023 trico bancshares#20SFR HELOC Agriculture Constructio and Junior Commercial SFR 1-4 & Farmland n Liens & Industrial Term CRE- Owner Multifamily Occupied CRE Non- Owner Occupied 4Q-2023 4Q-2022 4Q-2023 4Q-2022 4Q-2023 4Q-2022 4Q-2023 4Q-2022 Diversified Loan Portfolio $2,218 $2,150 $956 $982 $950 $945 $884 $792 4Q-2023 $586 % of CRE Non Own By Collateral Loans, net # Loans CRE (SMM) NOO Retail $570 349 26% Office $462 364 21% Hotel/Motel $331 94 15% Light Industrial $166 183 7% Mixed Use, Retail $137 93 6% Self Storage $134 49 6% Warehouse $103 116 5% Agriculture & Farmland 6% Mixed Use, Office $44 40 2% Auto & Other 1% Other (18 Types) $271 217 12% Total $2,218 1,505 100% 4Q-2022 $563 Construction 5% SFR HELOC and 4Q-2023 $357 Junior Liens 5% 4Q-2022 $393 4Q-2023 $347 Commercial & Industrial 9% CRE Non-Owner Occupied 33% 4Q-2022 $215 SFR 1-4 Term 13% 4Q-2023 $416 4Q-2022 $341 Multifamily 14% CRE-Owner Occupied 14% Auto & Other 4Q-2023 $73 4Q-2022 $55 20 0 Dollars in millions, Net Book Value at period end, excludes LHFS; Auto & other includes Leases; Commercial & Industrial includes six Municipality Loans for $20.4 mln. Investor Presentation | Fourth Quarter 2023 trico bancshares#21Office RE Collateral ➤ CRE loans secured by office collateral represents 9.6% of total Loan Portfolio Commitments. California Office Secured by Region Bay Area Santa Rosa Chic Reno Sacramento San Jose Salinas Santa Maria Fresno CALIFORNIA Bakersfield TCBK Community Loan Count Commitments Banking Regions Central Valley 302 Bay Area 121 Sacramento Valley 175 $ 331,917,917 177,180,724 165,769,178 Net Book Balance Net Book Balance (Avg) $ 305,701,666 $ 166,146,827 1,002,301 Wtd Avg LTV 60.4% 1,373,114 50.8% 157,622,703 900,701 60.0% Chico 124 78,903,894 76,318,105 615,469 63.2% Southern 31 53,168,340 49,127,431 1,584,756 59.8% Northern 55 22,558,533 19,911,868 362,034 60.9% Outside CA 17 21,753,355 21,690,628 1,275,919 51.8% Total 828 $851,251,941 $796,519,229 $961,980 58.3% Regions by Collateral Code Regions by Occupancy Type MEDICAL/DENTAL OFFICE Non Owner Occ MIXED USE - OFFICE Owner Occ OFFICE BUILDING Reno NEVADA Chico Reno Central Valley Chico Northern Sacramento Valley Sacramento Santa Rosa Southern Ventura Los Angeles Leng Beach Las Vegas San Diego Mexicali Jose Salinas Fresno CALIFORNIA Bakersfield Santa Maria Los Angeles eng Beach Las Vegas San Diego Mexicali Graph circle size represent total loan Commitments in the Region; regional assignment based upon zip code of collateral 21 Investor Presentation | Fourth Quarter 2023 Sacramento Santa Rosa Sant Sancisco San Jose Fresno Salinas Santa Maria CALIFORNIA Ventura Bakersfield Los Angeles Le Beach 4 San Diego Las Vegas Mexicali trico bancshares#22CRE Collateral Values 100% Distribution by LTV (1) 90% LTV Range ■ <= 60% ■>60%-75% 80% 70% 60% 70% ■> 75% 50% 52% 40% 30% 29% 20% 46% 80% 20% 62% 38% Avg Loan Outstanding Loan Segment LTV # Loans Size (SMM) (000s) CRE Non Owner Occupied Retail Building $2,238 53% 1,505 $1,487 $574 53% 349 $1,644 Office Building $467 57% 364 $1,282 Hotel/Motel $335 49% 94 $3,563 Light Industrial $169 53% 183 $923 Self Storage $135 51% 49 $2,749 Other $559 51% 466 $1,199 89% Multifamily $954 61% 515 $1,853 CRE Owner Occupied $963 59% 1,203 $801 Total $4,155 56% 3,223 $1,289 72% 24% 39% 60% 10% 11% 2% 3% 0% 0% 0% 4% 1% 0% Retail Building Office Building Hotel/Motel Light Industrial Self Storage Other Multifamily CRE Non-Owner Occupied by Collateral Type (1) LTV as of most recent origination or renewal date. 22 Investor Presentation | Fourth Quarter 2023 49% 44% 7% CRE Owner Occupied trico bancshares#23Unfunded Loan Commitments ■Outstanding Principal ($MM) Unfunded Commitment ($MM) $151 $150 $2,238 $2,172 $59 $61 HELOCS - by vintage, with weighted avg. coupon (8.86% total WAC) $225 9.63% 9.63% $200 9.37% 9.23% 9.27% 9.27% $175 8.95% 8.99% 8.91% $150 8.77% 8.72% 8.71% 8.64% $125 8.55% 8.28% $100 $75 $50 $25 $0 <2010 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 ■Private Balance (MM) Unfunded (MM) WA Rate $64 $59 $670 $593 $660 $631 $954 $950 $963 $990 $313 $134 $885 $235 $794 $312 $581 $565 $354 $391 $351 $420 $346 $218 $8 $8 $69 $54 4Q-2023 4Q-2022 | 4Q-2023 4Q-2022 4Q-2023 4Q-2022 4Q-2023 4Q-2022 4Q-2023 4Q-2022 | 4Q-2023 4Q-2022 4Q-2023 4Q-2022 | 4Q-2023 4Q-2022 4Q-2023 4Q-2022 CRE Non-Owner Occupied Multifamily SFR HELOC and Junior Liens Commercial & Industrial CRE-Owner Occupied SFR 1-4 Term Construction Outstanding Principal and Commitments exclude unearned fees and discounts/premiums, Leases, DDA Overdraft, and Credit Cards PPP Excluded from C&I for $0.4 million and $0.6 million in Outstanding Principal as of Q4 2023 and Q4 2022, respectively. Agriculture & Farmland Auto & Other 23 Investor Presentation | Fourth Quarter 2023 trico bancshares#24C&I Utilization C&l yield change generally remain tied to changes in the Prime Rate. Paired with treasury management services, C&I customers will be a continued source of noninterest bearing deposits. $209 $190 $43 C&I Utilization by NAICS Industry: 4Q-2023 Outstanding (min) Unfunded (mln) $180 $95 $74 $60 $52 $50 $37 $33 $37 $27 $28 $11 $14 $15 $73 48% 31% 53% Oil & Gas Extraction Construction Wholesale 66% Finance and Insurance 60% Real Estate 42% Healthcare 72% Trans and Warehouse 49% Retail Trade 29% Other (14 Categories) 7.89% 7.88% 7.60% 7.31% 6.79% 6.11% 4.91% 4.85% 4.84% 4.97% 4.96% 5.12% 4.46% $647 $593 $603 $628 $653 $670 $547 $552 $574 $544 $509 $527 $550 $560 $476 $448 $372 $384 $360 $353 $339 $197 $187 $206 $186 $191 43% 35% 33% 36% 4Q-2020 1Q-2021 2Q-2021 3Q-2021 Outstanding Principal ($MM) 45% 2Q-2022 Unfunded Commitment Excludes PPP loans; Outstanding Principal excludes unearned fees and discounts/premiums ($ millions) 35% 36% 4Q-2021 1Q-2022 47% 46% 48% 3Q-2022 4Q-2022 1Q-2023 46% 2Q-2023 46% 3Q-2023 47% 4Q-2023 Utilization WAR 24 Investor Presentation | Fourth Quarter 2023 trico bancshares#25Loan Yield Composition 99% of Floating benchmarked to Prime 25 9.11% 9.07% Predominantly benchmarked to 5 Year Treasury Floating 14% Adjustable 47% 61% Adjustable + Floating 7.47% 07.03% O 7.06% 6.93% O 6.81% 6.77% 6.22% 5.26% 4.64% 4.67% 4.54% 4.28% $985 $411 Monthly (Floating) < 1 Year $378 1 - 2 Years ■Adjustable Loans, Principal Outstanding ($MM) $518 $672 $762 $463 2-3 Years 3-4 Years 4-5 Years > 5 Years Adj Wtd Avg Rate o Adj Wtd Avg Rate if Repriced 12/31/2023 Dollars in millions, excludes PPP as well as unearned fees and accretion/amortization therein Wtd Avg Rate (weighted average rate) as of 12/31/2023 and based upon outstanding principal; Next Reprice signifies either the next scheduled reprice date or maturity. Investor Presentation | Fourth Quarter 2023 Fixed 39% trico bancshares#26Allowance for Credit Losses Drivers of Change under CECL $122,000 $120,000 $118,000 $118000 $115,812 $1,828 ($330) $3,101 $1,110 $1.1/,000 $112.000 1.73% of Total Loans Loan portfolio growth of $86 million in Q4 Growth driven by CRE NOO, Ag production and Construction segments Gross charge-offs $0.749 million Gross recoveries $0.419 million Driven by specific reserve increase $1.528MM, majority in Ag production Excludes gross charge-offs Primarily driven by econometric factor BBB yield Scaled to reflect $110MM $121,522 1.79% of Total Loans $110,000 ACL 9/30/2023 Portfolio Growth Charge Offs Criticized & Classified Reserve Rates ACL 12/31/2023 & Recoveries 26 6 Investor Presentation | Fourth Quarter 2023 trico bancshares#27Allowance for Credit Losses Allocation of Allowance by Segment CECL Adoption January 1, 2020 September 30, 2023 ($ Thousands) Allowance for Credit Losses Loans (Excl LHFS) ACL Amount December 31, 2023 ACL % of Loans Loans ACL (Excl LHFS) Amount ACL % of Loans Loans ACL ACL % of (Excl LHFS) Amount Loans Commercial real estate: CRE non-owner occupied CRE owner occupied $ 1,609,556 $ 546,434 Multifamily 517,725 12,649 0.79% 4,308 0.79% 5,633 1.09% $2,171,422 $ 33,723 1.55% $ 2,217,806 $ 35,077 1.58% 958,054 14,503 1.51% 956,440 15,081 1.58% 959,361 14,239 1.48% 949,502 14,418 1.52% Farmland 145,067 1,253 0.86% 278,608 4,210 1.51% 271,054 4,288 1.58% Total commercial real estate loans $ 2,818,782 $ 23,843 0.85% $4,367,445 $ 66,675 1.53% $ 4,394,802 $ 68,864 1.57% Consumer: SFR 1-4 1st DT $ 509,508 $ SFR HELOCS and junior liens Other Total consumer loans $ 362,886 82,656 955,050 $ 4,981 0.98% 10,821 2.98% $ 870,209 $ 13,535 1.56% 352,798 10,163 2.88% 2,566 3.10% 65,803 2,920 4.44% $ 883,437 $ 356,813 73,017 14,009 1.59% 10,273 2.88% 3,171 4.34% 18,368 1.92% $1,288,810 $ 26,618 2.07% $ 1,313,267 $ 27,453 2.09% Commercial and industrial $ 249,791 $ 2,906 1.16% $ 599,757 $ 12,290 2.05% $ 586,455 $ 12,750 2.17% Construction 249,827 4,321 1.73% 320,963 8,097 2.52% 347,198 8,856 2.55% Agriculture production 32,633 82 0.25% 123,472 2,125 1.72% 144,497 3,589 2.48% Leases 1,283 9 0.70% 8,219 7 0.09% 8,250 10 0.12% Total Loans and ACL $ 4,307,366 $ 49,529 1.15% $6,708,666 $ 115,812 1.73% $ 6,794,469 $ 121,522 1.79% Reserve for Unfunded Loan Commitments Allowance for Credit Losses $ 4,307,366 $ Discounts on Acquired Loans Total ACL Plus Discounts $ 4,307,366 $ 2,775 52,304 1.21% 33,033 85,337 1.98% 5,900 $6,708,666 $121,712 26,098 $6,708,666 $ 147,810 5,850 1.81% $ 6,794,469 $ 127,372 1.87% 24,639 2.20% $ 6,794,469 $ 152,011 2.24% 27 2 Investor Presentation | Fourth Quarter 2023 trico bancshares#2828 Risk Grade Migration 0.8% 1.1% 1.0% 1.0% 1.2% 1.3% Special Mention (NBV) Q4-2022 Q4-2023 1.8% 2.0% 2.0% 2.4% 1.4% 1.5% Pool 9.7% 8.0% 9.2% 8.8% 11.4% 12.1% CRE Non-Owner Occupied CRE-Owner Occupied Multifamily 0.0% $0.0 % (min) #Loans 2.0% $43.1 24 2.6% $25.2 16 0 Diff % (min) #Loans (min) # Loans 1.8% $39.1 9 -$3.9 -15 1.4% $13.4 13 -$11.8 -3 1.3% $12.2 3 $12.2 3 Agriculture & Farmland 8.5% $29.2 19 5.1% $21.2 28 -$8.0 9 SFR 1-4 Term 1.4% $11.4 28 0.2% $2.0 10 -$9.4 -18 SFR HELOC and Junior Liens 0.5% $1.9 48 0.7% $2.4 38 $0.5 -10 Commercial & Industrial 2.8% $15.7 27 0.4% $2.3 38 -$13.4 11 Construction 0.0% $0.0 0 3.0% $10.6 1 $10.6 1 Auto & Other 0.9% $0.5 92 Leases 0.0% $0.0 2 Grand Total 2.0% $127.0 256 0.6% $0.4 0.0% $0.0 1.5% $103.8 35 $0.0 -57 0 $0.0 175 -$23.2 -81 28 -2 87.8% 89.0% 87.8% 87.8% Substandard/DoubtfulLoss (NBV) 86.0% 85.0% Q4-2022 Q4-2023 Diff Pool % CRE Non-Owner Occupied 0.3% CRE-Owner Occupied 2.3% $22.3 Multifamily 0.0% $0.1 1 (min) #Loans % $6.9 8 0.7% 14 1.5% 0.0% $0.0 (min) #Loans (min) # Loans $15.7 15 $8.8 $14.0 12 -$8.2 7 -2 0 -S0.1 -1 Agriculture & Farmland 5.6% $19.1 15 8.2% $34.0 30 $14.9 15 SFR 1-4 Term 0.8% $6.4 39 1.0% $9.2 35 $2.8 -4 SFR HELOC and Junior Liens Commercial & Industrial 1.8% 0.9% $3.7 $10.3 70 1.1% $3.9 62 $0.2 -8 55 1.7% $10.1 53 -$0.2 -2 Construction 0.3% $0.6 4 0.0% $0.1 1 -$0.5 -3 Auto & Other 0.5% $0.3 23 3Q-2022 Pass 4Q-2022 1Q-2023 2Q-2023 3Q-2023 4Q-2023 Leases 0.0% $0.0 5 Watch ■Special Mention Substandard Grand Total 1.1% $69.6 234 0.9% $0.6 0.0% $0.0 4 1.3% $87.5 232 24 $0.4 1 $0.0 -1 $17.9 -2 Investor Presentation | Fourth Quarter 2023 Zero balance in Doubtful and Loss trico bancshares#2929 9 Non-Performing Assets as a % of Total Assets 0.75% TCBK Peers 0.68% 0.64% 0.60% 0.50% 0.46% 0.48% 0.42% 0.38% 0.38% 0.37% 0.38% 0.37% 0.39% 0.34% 0.34% 0.32% 0.25% 0.35% 0.40% 0.32% 0.21% 0.20% 0.17% 0.15% Asset Quality ➤The Bank continues to actively and aggressively address potential credit issues with short resolution timelines. ➤ Over the past three years both the Bank's total non-performing assets and coverage ratio have remained better than peers. Coverage Ratio: Allowance as % of Non-Performing Loans TCBK Peers 342% 297% 293% 281% 263% 179% 690% 2020 2021 2021 2021 2021 2022 2022 2022 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 2022 2023 2023 2023 2023 Q4 Q1 Q2 Q3 Q4 831% 586% 501% 2020 Q4 2021 Q1 2021 Q2 2021 Q3 2022 Q2 2021 Q4 2022 Q1 2022 Q3 2022 Q4 Peer group consists of 99 closest peers in terms of asset size, range $6.0-13.7 Billion, source: BankRegData.com NPA and NPL ratios displayed are net of guarantees. Peer Data for NPA update from Q1-2021 forward. Investor Presentation | Fourth Quarter 2023 686% 401% 392% 320% 2023 Q1 2023 Q2 2023 Q3 2023 Q4 trico bancshares#30+0.11% 70 CHANGE +011 +0.76% +0.25% -0.13% +0.76% PRICE $53.60 CHANGE +0.06 PRICE $1,515.31/ CHANGE +11.48 PRICE $44.70 CHANGE +0.11 PRICE $59.75/CHANGE -0.08 PRICE $115.33/ CHANGE +11.50 Financials trico bancshares Nasdaq TCBK +0.1970 PRICE $80.18 / CHANGE +0.15 ies Count tri bank PRICE $33.29 30 30 Investor Presentation | Fourth Quarter 2023 EST. CHICO, CALIFORNIA 1975 trico bancshares#3131 Net Interest Income (NII) and Margin (NIM) 3Q23 to 4Q23 Reported Net Interest Income (NII) & NIM Walk NII S in millions, NIM change in bps, all full taxable equivalent (FTE) Int Income (FTE) Net Int Income (FTE) • NIM (FTE) NII NIM 3Q23 $88.5 3.88% $116.3 $112.8 $107.5 $103.4 $103.3 Market rate changes - earning 2.4 11 assets $99.3 $93.7 Loan balances / mix and deferred fee earnings 2.3 10 $89.0 $88.5 $87.0 4.34% 4.21% Time deposit rate changes (0.8) (3) 3.96% 3.88% 3.81% Deposits balances / mix (0.9) (4) Securities portfolio balances / mix (1.3) (6) Borrowings (1.3) (6) Non-maturing deposit rate changes (2.0) (9) 4Q22 1Q23 2Q23 3Q23 4Q23 4Q23 - $87.0 3.81% Investor Presentation | Fourth Quarter 2023 trico bancshares#3232 32 Net Interest Income (NII) and Margin (NIM) 4Q22 to 4Q23 Reported Net Interest Income (NII) & NIM Walk NIIS in millions, NIM change in bps, all full taxable equivalent (FTE) Int Income (FTE) Net Int Income (FTE) ■NIM (FTE) NII NIM 4Q22 $99.3 4.34% $116.3 $112.8 $107.5 $103.4 $103.3 Market rate changes - earning assets 12.2 52 $99.3 $93.7 Loan balances / mix and deferred fee earnings 4.1 18 $89.0 $88.5 $87.0 4.34% 4.21% Interest-bearing cash & Fed Funds (0.7) (3) 3.96% 3.88% 3.81% Securities portfolio balances / mix (2.7) (12) Time deposits (5.4) (23) Borrowings (6.3) (27) Non-maturing deposits (13.6) (58) 4Q22 1Q23 2023 3Q23 4Q23 4Q23 ► $87.0 3.81% Investor Presentation | Fourth Quarter 2023 trico bancshares#33Current Operating Metrics Net Interest Margin (FTE) Efficiency Ratio 4.47% 4.22% 4.30% 3.96% 3.88% 3.96% 3.58% 65.4% 63.7% 59.7% 58.4% 55.8% 53.2% 53.0% 2017 2018 2019 2020 2021 2022 2023 2017 2018 2019 2020 2021 2022 2023 PPNR as % of Average Assets 1.94% 1.91% 1.97% 1.83% 1.87% 1.70% 1.73% 2017 2018 2019 2020 2021 2022 2023 2023 values through the nine months ended 9/30/2023, annualized where applicable 33 Investor Presentation | Fourth Quarter 2023 0.89% ROAA 1.43% 1.43% 1.24% 1.28% 1.19% 0.91% 2017 2018 2019 2020 2021 2022 2023 trico bancshares#3434 Well Capitalized Tier 1 Capital Ratio 14.4% 14.0% 14.2% 13.7% 13.2% CET1 Ratio 13.3% 13.2% 12.9% 12.5% 12.9% 12.4% 11.7% 12.2% 11.7% 2017 2018 2019 2020 2021 2022 2023 2017 2018 2019 2020 2021 2022 2023 Total Risk Based Capital Tangible Capital Ratio 15.1% 15.2% 15.4% 10.6% 14.7% 14.4% 9.5% 14.1% 14.2% 9.3% 9.3% 9.2% 8.8% 7.6% 2017 2018 2019 2020 2021 2022 2023 2017 2018 2019 2020 2021 2022 2023 2023 values at quarter ended 12/31/2023 Investor Presentation | Fourth Quarter 2023 trico bancshares#35tri counties bank Trico Bancshares is commited to: Improving the financial success and well-being of our shareholders, customers, communities and employees.