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Sterling Bank

Barron, WI · Cert 6195 · Northwest Wisconsin Bcorp Inc.

State charter, non-member · FDIC · 4 branches

Q2 2026

$352.4MAssets
$257.8MLoans
$314.5MDeposits
$32.5MEquity
Loan mix
94%RE $223.2M6%C&I $13.3M1%Consumer $2.0MQ2 2025Q2 2026
Deposit mix
80%Interest-bearing $251.7M20%Noninterest $62.8MQ2 2025Q2 2026

NIM

4.54%Q2 ’244.81%Q2 ’255.00%Q2 ’26+13%+13%

Non-interest income vs. expense

2.00%Q2 ’242.06%Q2 ’252.14%Q2 ’26+1%+2%

Financial Results

Return on Assets (quarter, annualized)

1.33%+26 bps YoY

Net Interest Margin (quarter, annualized)

3.46%+40 bps YoY

Efficiency Ratio (quarter, annualized)

54.80%-478 bps YoY

Tier 1 Leverage Ratio

9.37%+35 bps YoY

Discrete quarter, annualized.

MetricQ2 2025Q3 2025Q4 2025Q1 2026Q2 2026YoY ΔTrend
Return on Assets1.07%1.19%1.35%1.24%1.33%+26 bps
Net Interest Margin3.06%3.23%3.41%3.37%3.46%+40 bps
Non-Interest Burden1.67%1.69%1.67%1.74%1.70%+3 bps
Loan Growth (YoY)4.47%5.78%8.75%6.85%6.44%+197 bps
Nonperforming Loans / Loans0.00%0.04%0.04%0.04%0.02%+2 bps
Allowance / Loans0.95%0.91%0.89%0.90%0.90%-5 bps
Tier 1 Leverage Ratio9.02%9.29%8.95%9.20%9.37%+35 bps
Equity / Assets8.87%9.06%8.72%9.05%9.23%+36 bps
Liquid Assets / Assets23.27%23.02%22.03%22.59%21.03%-224 bps