First Busey Results Presentation Deck

1 2Q23 Earnings Investor Presentation First Busey Corporation | Ticker: BUSE Actively Managing Asset-Sensitive Balance Sheet ■ ■ ■ Balance sheet remains asset-sensitive, progressing towards becoming more rate neutral A +100 bps rate shock for Year 1 is up to +2.2% from +2.1% in 1Q23 A -100 bps rate shock for Year 1 is -2.6%; up from -2.9% in 1Q23 Continue to evaluate off-balance sheet hedging strategies as well as embedding rate protection in our asset originations to provide stabilization to net interest income in lower rate environments Vigilant focus on pricing discipline for both loans and deposit 6% of deposits are indexed/floating rate 38% of loan portfolio reprices in less than one year Repricing / Maturity Structures of Portfolio Loans . Within 1 Year 38% 5+ Years 27% 1-2 Years 7% 2-3 Years 8% 3-5 Years 20% Deposit betas are calculated based on an average fed funds target rate of 5.16% during 2023 Annual % Change in Net Interest Income under Shock Scenarios Rate Shock +200 bps +100 bps -100 bps -200 bps 21% Year 1 Deposit Betas¹ in last Tightening Cycle vs. Current ALCO Model Forecast 26% +4.4% +2.2% -2.6% -5.1% Balance sheet is projected over one- & two-year time horizons and net interest income is calculated under current market rates assuming permanent instantaneous shifts ALCO Model Forecast - Peak NM Deposits Beta, 36% ALCO Model Forecast - Peak Total Deposits Beta, 32% 3Q15 - 2019 (+225 bps move in FF) IB Non-Maturity Beta Year 2 24% +5.1% +2.5% -3.5% -7.0% 20% 1Q22- 1Q23 (+500 bps move in FF) Total Deposit Beta Peak IB NM deposit beta increased from 31% to 36% and peak total deposit beta increased from 27% to 32% Increase in estimated betas driven by change in deposit mix Peak beta expected to occur in mid-2024 25 B ТВ

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