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Letter portraitLegal landscapeQuarterYTD

Keystone Bank, SSB

Bee Cave, TX · Cert 34456

FDIC · 3 branches

Q4 2025

$1.0BAssets
$814.9MLoans
$864.9MDeposits
$103.7MEquity
Loan mix
81%RE $657.0M19%C&I $154.8M0%Consumer $1.0MQ1 2024Q4 2025
Deposit mix
82%Interest-bearing $712.8M18%Noninterest $152.0MQ1 2024Q4 2025

Return on Assets (YTD, annualized)

0.73%-6 bps YoY

Net Interest Margin (YTD, annualized)

3.35%+27 bps YoY

Efficiency Ratio (YTD, annualized)

58.60%-686 bps YoY

Tier 1 Leverage Ratio

9.41%-47 bps YoY

NIM

5.41%Q4 ’236.12%Q4 ’245.98%Q4 ’25+2%+9%

Non-interest income vs. expense

2.00%Q4 ’232.13%Q4 ’242.05%Q4 ’25+4%-3%

Year to date, annualized, through each quarter.

MetricQ1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025YoY ΔTrend
Return on Assets0.77%0.78%0.79%0.79%0.95%0.97%1.01%0.73%-6 bps
Net Interest Margin3.07%3.02%3.00%3.08%3.38%3.41%3.36%3.35%+27 bps
Non-Interest Burden1.94%1.90%1.92%1.97%2.08%2.03%2.00%1.92%-5 bps
Loan Growth (YoY)10.44%14.63%11.54%11.90%8.86%9.43%14.03%5.78%-612 bps
Nonperforming Loans / Loans0.52%0.50%0.01%0.01%0.02%0.10%0.11%0.11%+11 bps
Allowance / Loans0.90%0.91%0.93%0.93%0.92%0.94%0.94%0.96%+4 bps
Tier 1 Leverage Ratio10.14%9.73%9.70%9.88%9.75%9.75%9.61%9.41%-47 bps
Equity / Assets9.66%9.79%10.07%10.07%9.63%9.83%9.84%10.19%+12 bps
Liquid Assets / Assets8.48%6.29%8.54%6.48%12.24%9.27%10.24%9.82%+333 bps