2018 ANNUAL REPORT Service Excellence in Everything We Do

2018 ANNUAL REPORT At Busey, we are dedicated to preserving a legacy of associate excellence, customer service, community involvement and expanding shareholder value. Through a steadfast commitment to and unwavering support of balance sheet strength, profitability and growth—in that order—Busey remains a strong, independent financial organization. It is because of your trust in us that we are here today. Busey. Service Excellence in Everything We Do.

Through First Busey Corporation’s (“Busey”) vision of providing a premier service experience and the steadfast support of you, valued shareholders, Busey remains a strong, efficient community bank with broad financial capabilities, close relationships and solid support from associates, customers and communities. This commitment from the organization’s 4 Pillars is what sets Busey apart—today and into the future. As Busey grows, we thank you for your continued support and contributions to the growth of your organization. We are guided by a vision, driven to Service Excellence in Everything We Do. CORPORATE STRATEGY & GROWTH Through a continued commitment to balance sheet strength, profitability and growth—in that order—Busey remains a strong, independent financial organization. merger was completed. TheBANK, founded in 1868, is headquartered in Edwardsville, Illinois and shares a storied history and legacy of service excellence. The Banc Ed business combination fits with Busey’s disciplined strategy— growing Busey’s current geographic footprint, allowing Busey to serve customers by expanding in the St. Louis Missouri-Illinois Metropolitan Statistical Area and significantly adding to Busey’s wealth management business. Busey and TheBANK have similar risk philosophies, and the combined entity will continue to build upon capital strength and solid credit practices. Busey’s 2018 annual results were favorably impacted by the prior year’s acquisitions of First Community Financial Partners, Inc., the holding company of First Community Financial Bank (“First Community”), headquartered in Joliet, Illinois, and Mid Illinois Bancorp, Inc., the holding company of South Side Trust & Savings Bank of Peoria (“South Side”), headquartered in Peoria, Illinois. The addition of First Community and South Side enhanced Busey’s core Additionally, we are honored to share Michael D. Cassens’ appointment to the First Busey Corporation Board of Directors, effective January 31, 2019. Mr. Cassens, a 16-year director of TheBANK and Banc Ed, is an Assistant Professor in the Department of Media Arts at deposits, commercial banking and trust and investment presence in the Chicagoland and greater-Peoria areas. We continue to focus on organic growth, evaluating and executing on acquisitions which fit Busey’s strategy—as we have done in previous business combinations. the University of Additionally, Mr. an independent for Fortune 500 Montana in Missoula. Cassens works as software developer companies such as In the third quarter of 2018, Busey announced the signing of a definitive agreement to acquire The Banc Ed Corp. (“Banc Ed”), the holding company of TheBANK of Edwardsville (“TheBANK”). On January 31, 2019, the holding company Microsoft™ and Intel® along with a variety of small-to medium-sized businesses. We are excited to bring Mr. Cassens’ industry knowledge, technical expertise and business acumen to Busey. Service Excellence in Everything We Do DEAR FELLOW SHAREHOLDERS

Maintaining a focused commitment to strong corporate was organized in 1980. governance allows Busey to effectively manage Another indicator of balance sheet strength is Busey’s tangible stockholders’ common equity (“TCE”), which increased to $703.0 million at December 31, 2018—up 10% over $638.0 million at prior year-end. TCE represented 9.49% of tangible assets at December 31, 2018, compared to 8.43% the preceding year. resources—building partnerships and firm foundations in the communities we serve. Through smart process improvements and strategic investments in technology, Busey is developing capabilities to serve customers more efficiently and effectively while managing growth and risk. Leveraging and improving technology platforms and furthering regionalization efforts will initiatives in 2019. remain instrumental With a long-term commitment to operational excellence that delivers savings, benefitting both growth and margins, Busey continues to improve its efficiency ratio. The efficiency ratio for the year-ended December 31, 2018 was 56.16% compared to 58.27% for the year-ended December 31, 2017. Essential to support organic growth, Busey will continue in 2019 to extend and refine the regional operating model implemented in late 2018 by Commercial Banking—including Commercial Credit and Commercial Support—to provide local autonomy and decision-making, delivering a strong Financial performance from 2018 does include pre-tax merger and restructuring expenses of $5.6 million. and differentiated customer experience that organization apart from competitors. sets the By remaining focused and effectively managing resources, Busey can continue to serve customers’ needs, reward associates for growth and provide returns to you, Busey’s valued shareholders. As we reflect on another positive year, the organization is incredibly grateful for your trust and the opportunity to serve Busey customers’ unique financial needs for generations. CAPITAL STRENGTH We are pleased to financial results and, to the organization’s report another as importantly, strong year of continued value 4 Pillars—associates, customers, shareholders and communities. Busey steadily increased earnings by 57.7% or $36.2 million from 2017 to 2018—delivering $98.9 million in net income available to common stockholders for the year-ended December 31, 2018. Over the last year, earnings per share increased from $1.45 to $2.01—growth of 38.6% in fully-diluted earnings per share from 2017. ENGAGING EXCELLENCE Developed and advanced by associates, Busey’s stability is supported by an active, engaged and positive culture as measured by the Associate Engagement Survey. Associates posted the highest engagement survey score in the history of the organization in 2018—4.17 out of 5—with nearly 90% participation company-wide, positively impacting the future of the organization. In 2018, Busey grew quarterly dividends to $0.20 per share from $0.18 in 2017 and further increased the organization’s dividend to $0.21 on February 1, 2019— continuing an uninterrupted history of paying dividends to common stockholders since the bank holding company At Busey, we strive to provide a positive work environment through a variety of initiatives. As Busey observed its 2018 ANNUAL REPORT

sesquicentennial in 2018, associates’ continued efforts were recognized in new ways as we strive to show appreciation for those who continuously provide service excellence. With Mr. Ambrose’s unexpected passing in early 2019, Busey lost an exemplary board member, an outstanding human being and a dear friend. We are incredibly grateful to Mr. Ambrose for his significant contributions through his 26 years of dedication to the Busey organization. In his honor, we will continue his legacy of engaging excellence through positivity, ingenuity and perseverance. Beyond recognition, Busey associates make a positive and lasting impact in the communities we serve. Encouraged to live the Busey Promise by being actively engaged at work and in the community, associates generously donated more than 20,000 hours of their time to area organizations in 2018, and together with Busey, more than $1 million to local charities. SUMMARY Outstanding service—the implicit promise of Busey’s brand—is the organization’s core commitment to associates, customers, shareholders and communities. A commitment to Service Excellence in Everything We Do defines Busey’s longstanding history dating back 150 years. Continuing to expand through organic growth and acquisition opportunities, the culture of the combined organizations is one of engagement, humility and responsiveness. Busey is humbled by and grateful for accolades that both showcase how special the organization is and bring a sense of pride to associates working diligently each day to serve customers and one another. Forbes and Statistica named Busey among the 2018 Best-In-State Banks—based solely on customer opinions—a first-of-its-kind recognition. Additionally, Busey Wealth Management was among the 2018 Best Places to Work in Money Management by Pensions & Investments, and Busey was named a Top Workplace in St. Louis by the St. Louis Post-Dispatch. Contributions from associates add to the accomplishments and growth of Busey. Thank you to the 1,300+ associates across Illinois, Missouri, Florida, and Indiana whose hard work, alignment behind key strategies and goals, and tireless dedication enable the corporation to deliver on the Busey Promise. Busey is honored to be among the Best Places to Work in Illinois and Best Banks to Work For in the U.S. by American Banker since 2016, as well as Best Companies to Work For in Florida since 2017. With sincere gratitude, I thank you, valued shareholders, for your continuing support. As Busey partners with like-minded organizations, we are honored to be recognized for valuing and engaging associates, fostering a culture of camaraderie and positivity among teams, and promoting trust and respect throughout the organization. Together, we serve Busey’s Pillars humbly, as a financial services organization with an promising future. extraordinary heritage and As we reflect on the contributions of Busey associates, we VAN A. DUKEMAN, CFA President & Chief Executive Officer First Busey Corporation also recognize Joseph M. Ambrose—a visionary inspiring mentor and community advocate. leader, Service Excellence in Everything We Do

1,300 associates with an internal eNewsletter including the Busey Promise Award, Annual Associates’ Meeting hours completed in 2018 Milestones recognized in 2018 90% engagement contributions to associate by 500+ participants Transform, engages 80+ leaders—58 mentors across the organization to Work in Illinois since 2016, Best Companies to Work 2018 ANNUAL REPORT ASSOCIATES More than124 issues of Busey’s average tenure of 7.83 yearsBetween the Lines, since 2015 More than a dozen recognition programs, Associate Appreciation Month and 139 associate Service36,500+ training Nearly 75 associates featured as Faces of Busey in 2018, receiving more than 5,800 reactions and comments on Facebook $1.8+ million in Health Savings Accounts sincein the B Well health 2015 through B Welland wellness program More than 8,000 hours committed to both sales & service and corporate training programs Top leadership development program, of which are currently serving as Best Banks to Work For across the U.S. and Best Places For in Florida and Association for Talent Development’s BEST Award in 2018 and 2017, Best Place to Work in Money Management in 2018, American Heart Association’s Silver Recognition in 2018 and the St. Louis Business Journal’s Healthiest Employer in 2017 The Busey Promise to 4 Pillars All relationships begin with the Busey Promise. We embrace and consistently fulfill the Busey Promise to 4 Pillars— associates, customers, shareholders and communities. Associates We recruit and retain the best and brightest associates—serving as Busey’s front-line relationship managers; we entrust them to be knowledgeable, trustworthy, friendly, responsive, humble, positive and resilient. Customers We are customer-centric and organizationally aligned to anticipate and exceed the needs of customers. Customers are the core of everything Busey. Shareholders By exceeding the needs of customers through the efforts of talented associates and strengthened communities, shareholders are rewarded with the sustained financial results and profitability they expect from Busey. Communities Being a community financial services organization means being a good corporate neighbor—partnering for purpose and progress. We partner with customers and associates in support of communities, providing support financially and with service hours, and contributing as active community leaders. To achieve a vision of service excellence, Busey works tirelessly to fulfill promises made to the Pillars of your organization. 2018 PROGRESS FOR PILLARS

Nearly 160,000 total centers in Illinois, Missouri, 2017, and well above the industry average of 32.0— Busey Mobile increase of nearly 5 points from 2017— surveyed for feedback on processed annually by FirsTech at 4,000 recognition by Forbes and Statista, based 30,000+ Community of Chicagoland and South all U.S. banks were recognized) TheBANK of Edwardsville in 2019 MoneyPass® ATMs and 141 organizations through Pay It Forward Fridays jeans days since 3 economic annual Community donated annually Promise a Plate during the United Way Pillar magazine columns and podcasts in the Busey Illinois Youth Run title on social media collected and More than with nearly 90 participants through Supplies for education series hours given back volunteers annually Associates, customers, shareholders and communities—the Pillars of Busey—truly shape the future of the organization. Through your invaluable input, you help make Busey an organization unlike any other! Service Excellence in Everything We Do COMMUNITIES 2,500+ volunteer hours$150,000+ donated $1+ millionserved during Busey’s annuallyseminarsPromise Monththeir inception in 2015 150,000+ meals since 2012 to area Nearly $320,000 donated2 issues of Thefood banks during Countless educational articles, corporate campaignannuallyResource Center on busey.com 8,000+ votes sponsor for more than a decade 4 customer20,000 volunteerand 100+ associate$2,000 donated sessions annuallyeach yearSuccess CUSTOMERS More than 60 banking45.3 Net Promoter Score®, an increase of 4.5 points fromNearly 40,000 households servedFlorida and Indianareflecting Busey’s commitment to a premier service experienceApp users 80.8 Net Promoter Score® for FirsTech—an 10,034 customers28 million transactions celebrating 35 years of superior payment processingtheir experience with Buseyagent locations in 43 states 1 of 5 banks in Illinois named a Growing forward, together, with FirstBest-In-State Bank—a first-ever Side of greater Peoria and the addition of solely on customer opinions (only 2.2% of surcharge-free

Executive Management Van A. Dukeman President & Chief Executive Officer First Busey Corporation Curt A. Anderson President of Busey Wealth Management Busey Bank Robin N. Elliott Chief Financial Officer Chief Operating Officer First Busey Corporation Barbara J. Harrington Chief Risk Officer First Busey Corporation Howard F. Mooney II President & Chief Executive Officer FirsTech, Inc. Chief Information Officer First Busey Corporation Robert F. Plecki Chief Credit Officer First Busey Corporation John J. Powers General Counsel First Busey Corporation Amy L. Randolph Chief of Staff Executive Vice President, Pillar Relations First Busey Corporation Christopher M. Shroyer President & Chief Executive Officer Busey Bank 2018 ANNUAL REPORT SERVICE LEADERS

CORPORATE PROFILE As of December 31, 2018, First Busey Corporation (NASDAQ: BUSE) was a $7.70 billion financial holding company headquartered in Champaign, Illinois. Busey Bank, its wholly-owned bank subsidiary with total assets of $7.69 billion as of December 31, 2018, is headquartered in Champaign, Illinois and has forty-four banking centers serving Illinois, thirteen banking centers in the St. Louis, Missouri metropolitan area, five banking centers serving southwest Florida and a banking center in Indianapolis, Indiana. Busey Bank provides asset management, investment and fiduciary services to individuals, businesses and foundations. As of December 31, 2018, assets under care were approximately $7.12 billion. Busey Bank owns a retail payment processing subsidiary, FirsTech, Inc., which processes approximately 28 million transactions per year using online bill payment, lockbox processing and walk-in payments at its 4,000 agent locations in 43 states. More information about FirsTech, Inc. can be found at firstechpayments.com. TheBANK of Edwardsville is a wholly-owned bank subsidiary of First Busey Corporation acquired in the January 31, 2019 merger. Headquartered in Edwardsville, Illinois, TheBANK has nineteen banking centers and one loan production office in the greater St. Louis, MO-IL MSA. As of December 31, 2018, prior to the merger, on a consolidated basis with its holding company, had total assets of $1.76 billion. Busey Bank was named among Forbes’ 2018 Best-In-State Banks— one of five in Illinois and 124 from across the country, equivalent to 2.2% of all banks. Best-In-State Banks are awarded for exceptional customer experiences as determined by a survey sample of 25,000+ banking customers who rated banks on trust, terms and conditions, branch services, digital services and financial advice. For more information about us, visit busey.com and 4thebank.com. Service Excellence in Everything We Do

SHAREHOLDER INFORMATION Corporate Headquarters First Busey Corporation, 100 W. University Ave., Champaign, IL 61820, 217.365.4500. Visit Busey’s website at busey.com. Annual Meeting The Annual Meeting of Shareholders of First Busey Corporation will be held on Wednesday, May 22, 2019 at 2 p.m. at the Urbana Country Club, 100 E. Country Club Rd., Urbana, IL 61801. First Busey Corporation Common Stock First Busey Corporation common stock is listed on the NASDAQ Global Select Market under the symbol BUSE. Annual Report on Form 10-K A copy of the Annual Report on Form 10-K filed with the Securities and Exchange Commission can be found at busey.com. Stock Transfer Agent Computershare, P.O. Box 30170, College Station, TX 77842-3170. The transfer agent can be accessed at computershare.com/investor. SPECIAL NOTE CONCERNING FORWARD-LOOKING STATEMENTS Statements made in this report, other than those concerning historical financial information, may be considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the financial condition, results of operations, plans, objectives, future performance and business of Busey. Forward-looking statements, which may be based upon beliefs, expectations and assumptions of Busey’s management and on information currently available to management, are generally identifiable by the use of words such as “believe,” “expect,” “anticipate,” “plan,” “intend,” “estimate,” “may,” “will,” “would,” “could,” “should” or other similar expressions. Additionally, all statements in this document, including forward-looking statements, speak only as of the date they are made, and we undertake no obligation to update any statement in light of new information or future events. A number of factors, many of which are beyond our ability to control or predict, could cause actual results to differ materially from those in our forward-looking statements. These factors include, among others, the following: (i) the strength of the local, state, national and international economy (including the impact of tariffs, a U.S. withdrawal from or significant negotiation of trade agreements, trade wars and other changes in trade regulations); (ii) changes in state and federal laws, regulations and governmental policies concerning Busey’s general business; (iii) changes in accounting policies and practices; (iv) changes in interest rates and prepayment rates of Busey’s assets; (v) increased competition in the financial services sector and the inability to attract new customers; (vi) changes in technology and the ability to develop and maintain secure and reliable electronic systems; (vii) the loss of key executives or employees; (viii) changes in consumer spending; (ix) unexpected results of current and/or future acquisitions, which may include failure to realize the anticipated benefits of the acquisition and the possibility that the transaction costs may be greater than anticipated; (x) unexpected outcomes of existing or new litigation involving Busey; (xi) the economic impact of any future terrorist threats or attacks; and (xii) the economic impact of exceptional weather occurrences such as tornadoes, hurricanes, floods, and blizzards. These risks and uncertainties should be considered in evaluating forward-looking statements and undue reliance should not be placed on such statements. Additional information concerning Busey and its business, including additional factors that could materially affect its financial results, is included in Busey’s filings with the Securities and Exchange Commission. Member FDIC 2018 ANNUAL REPORT

Pillars—associates, customers, shareholders and communities—past and present truly make Busey. . . Busey. We thank you for your unwavering support in building upon and preserving Busey’s legacy—one of associate excellence, customer service, expanding shareholder value and community involvement. We are incredibly grateful for your trusted relationship and the opportunity to serve your unique financial needs today and for generations to come. Service Excellence in Everything We Do

First Busey Corporation 100 W. University Ave., Champaign, IL 61820 217.365.4500 | busey.com | NASDAQ: BUSE Busey 2019 | All Rights Reserved Busey’s Financial Suite of Services: