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Letter portraitLegal landscapeQuarterYTD

Crystal Lake Bank & Trust Company, National Association

Crystal Lake, IL · Cert 34681 · Wintrust Financial Corp.

National charter · OCC · 15 affiliate banks · 6 branches (213 in holding)

Q2 2026

$2.3BAssets
$1.8BLoans
$1.9BDeposits
$200.1MEquity
Loan mix
41%RE $630.4M45%C&I $685.0M14%Consumer $213.0MQ3 2024Q2 2026
Deposit mix
81%Interest-bearing $1.5B19%Noninterest $0.3BQ3 2024Q2 2026

Return on Assets (quarter, annualized)

1.59%-22 bps YoY

Net Interest Margin (quarter, annualized)

3.28%-25 bps YoY

Efficiency Ratio (quarter, annualized)

33.21%+20 bps YoY

Tier 1 Leverage Ratio

9.65%-36 bps YoY

NIM

6.05%Q2 ’245.80%Q2 ’255.31%Q2 ’26-2%-7%

Non-interest income vs. expense

1.33%Q2 ’241.25%Q2 ’251.22%Q2 ’26-6%-17%

Discrete quarter, annualized.

MetricQ3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026YoY ΔTrend
Return on Assets2.10%1.63%1.50%1.80%1.96%1.53%1.50%1.59%-22 bps
Net Interest Margin3.50%3.38%3.41%3.53%3.44%3.20%3.28%3.28%-25 bps
Non-Interest Burden1.05%1.09%0.97%0.99%0.85%0.86%0.94%0.83%-17 bps
Loan Growth (YoY)5.96%11.81%11.53%12.46%12.57%14.09%12.76%13.07%+61 bps
Nonperforming Loans / Loans0.54%0.51%0.32%0.24%0.09%0.60%0.40%0.34%+10 bps
Allowance / Loans0.69%0.73%0.83%0.80%0.77%0.80%0.82%0.82%+2 bps
Tier 1 Leverage Ratio9.78%9.84%9.83%10.02%9.91%10.19%10.18%9.65%-36 bps
Equity / Assets9.39%9.19%9.13%9.05%9.29%9.45%9.42%8.85%-19 bps
Liquid Assets / Assets9.14%10.26%7.17%8.17%7.97%7.13%8.56%5.41%-277 bps