Security Bank (New Auburn, WI)
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Data as of · sourced from FFIEC call reports. How we update
Security Bank is an FDIC-insured commercial bank headquartered in New Auburn, WI, established in 1907 (FDIC certificate 10015), and it is supervised by the FDIC. At Q2 2026 it reported total assets of $253.8M, up 10.8% from Q2 2025, the 110th largest of 153 banks headquartered in Wisconsin. It reports no CET1 ratio; its Tier 1 leverage ratio was 11.58% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Charter
- Commercial bank
- Regulator
- FDIC
- Deposit insurance
- FDIC
- FDIC certificate
- 10015
- Headquarters
- New Auburn, WI
- Established
- 1907
- Total assets, Q2 2026
- $253.8M
- Assets vs Q2 2025
- +10.8%
- Tier 1 leverage ratio, Q2 2026
- 11.58%
- Domestic offices
- 4 FDIC institution directory, current count
- Routing number
- 091806242
- Latest call report
- Q2 2026, FFIEC 051 · Security Bank call report
- Holding company
- SECURITY BANK SHARES, INC.
- Asset rank in state
- 110th of 153 in Wisconsin
Security Bank pays more for its money than most banks of its size. Its balance sheet stood at $254 million at June 30, 2026, up 10.8% from a year earlier; it is based in New Auburn, Wisconsin. It pays an average of 3.03% on its deposits and borrowings, higher than about 9 in 10 of the 2,660 banks with $100 million to $1 billion in assets (median 1.80%). On the other hand, it holds commercial real estate loans equal to only 21% of its capital, a small fraction of the median of 1.2 times for banks its size.
Earnings jumped: net income for the quarter was $1.1 million, 76% above the same quarter a year earlier. Over the same year, loans grew 15.3% and deposits grew 10.5%. Credit is the area to watch: it carries problem assets equal to 8.6% of the capital and reserves that would absorb them, about triple the median of 2.6% for banks its size.
As of June 30, 2026, Security Bank reported a return on assets of 1.73%, a nonperforming-loan ratio of 1.19% and a Texas ratio of 8.56%. The figures come from its call report filed with the FFIEC.
By total assets at Q2 2026, Security Bank is the 110th largest of the 153 banks headquartered in Wisconsin. Between Q1 2026 and Q2 2026, its total assets rose 5.3% to $253.8M, loans rose 6.5% and deposits rose 5.8%. Its loan book on June 30, 2026 was led by owner-occupied commercial real estate loans, at 43.2% of total loans, followed by 1-4 family residential loans at 27.1%. The FDIC Summary of Deposits lists 4 offices for it, in 4 cities in WI; its New Auburn office books 57% of its branch deposits. On its Q2 2026 call report, Security Bank meets the community bank leverage ratio test for well capitalized.
Headquarters Profile
- Address
- 112 E Main St, New Auburn, WI 54757
- County
- Chippewa
- Metro Area
- Eau Claire, WI
- Charter
- Commercial bank, state charter, Fed non-member, FDIC-supervised
- Primary Regulator
- FDIC
- FDIC Region
- Chicago (Region 9)
- Federal Reserve member
- No
- Federal Reserve district
- District 9, Minneapolis
- Fiduciary (trust) powers
- —
- Call Report form
- FFIEC 051
- Established
- August 28, 1907
- Domestic offices
- 4 FDIC institution directory, current count
- Employees (FTE)
- 24
- Domestic deposits
- $216.4M
- Allowance for credit losses
- $1.9M
- Net charge-offs (YTD)
- $76K
- Average total assets
- $255.9M
- Average total loans
- $220.8M
- Average interest-bearing deposits
- $172.8M
- Tax status
- C corporation
- Ownership
- Stock
- Community bank
- Yes
- FDIC-insured since
- January 1, 1934
- FDIC Cert
- 10015
- Fed RSSD
- 20053
- Website
- www.securityonlinebank.com →
- Parent Holding Company
- SECURITY BANK SHARES, INC. (RSSD 1128497)
Profitability
Q2 annualizedBalance Sheet
Income Statement
Operating & Funding
Ratios tagged annualized use the Q2 income alone. The UBPR and FDIC annualize the year to date instead. FDIC BankFind divides by the average of quarter-end total assets, the UBPR by RC-K average assets. The YTD margin is the UBPR's tax-equivalent figure over its own average earning assets; FDIC BankFind's margin is not tax-equivalent. As a community bank leverage ratio filer, Security Bank reports no risk-based capital ratios; its Tier 1 leverage ratio applies. How we compute these figures
Quarterly trends
Over the 12 quarters to Q2 2026, Security Bank's total assets ran between $167.6M (Q3 2023) and $253.8M (Q2 2026), and it earned a profit in all 12 quarters. The line under each chart compares Q2 2026 with Q2 2025. How these charts are built
$253.8M total assets against $229.1M; $224.3M total liabilities against $203.4M.
$225.3M net loans and leases against $195.2M; $216.4M total deposits against $195.8M.
$4.0M securities against $4.8M; $19.8M cash and balances due against $24.6M.
$4.1M total interest income against $3.7M; $1.6M total interest expense against $1.6M.
$2.5M net interest income against $2.1M.
$166K total noninterest income against $159K; $1.2M total noninterest expense against $1.3M.
$60K provision for credit losses against $60K.
$1.1M net income against $628K.
1.73% return on assets against 1.12%; 3.94% net interest margin against 3.75%.
11.58% tier 1 leverage ratio against 11.51%.
Inside the full Security Bank terminal
21 quarters of trends · 8 tabs · peer percentiles · watchlist alerts
Unlock this bank, freeWatch flags
Automated conditions triggered on this bank's latest filing. Advisory only; see the source metric pages for full context. Each flag is tagged Regulatory when it cites an official supervisory threshold, or BRR analysis when it's our own band, informed by our data and models.
Loans outstanding are at or above total deposits. The bank reports little borrowing or brokered funding, so the difference is carried mainly by equity and other liabilities. Worth watching if loan growth continues to outpace deposits. Industry heuristic, not a supervisory threshold.
Security Bank rankings
Its closest position to the top of a national ranking is 407 of 3,606, for efficiency ratio; its furthest is 2,683 of 4,196, for total assets.
Quarterly trend: last 8 quarters
From Q3 2024 to Q2 2026, its return on assets ran from 1.12% (Q2 2025) to 1.81% (Q4 2025) and its net interest margin ran from 3.69% (Q3 2024) to 4.19% (Q4 2025).
| Quarter | Leverage | ROA | NPL | Texas | NIM |
|---|---|---|---|---|---|
| Q2 2026 | 11.58% | 1.73% | 1.19% | 8.56% | 3.94% |
| Q1 2026 | 12.16% | 1.70% | 1.23% | 8.67% | 4.04% |
| Q4 2025 | 11.89% | 1.81% | 1.25% | 8.86% | 4.19% |
| Q3 2025 | 11.63% | 1.47% | 1.25% | 8.79% | 4.08% |
| Q2 2025 | 11.51% | 1.12% | 1.24% | 8.89% | 3.75% |
| Q1 2025 | 11.73% | 1.45% | 0.61% | 4.39% | 3.81% |
| Q4 2024 | 11.71% | 1.45% | 0.78% | 5.55% | 3.81% |
| Q3 2024 | 12.14% | 1.19% | 0.87% | 6.12% | 3.69% |
Swipe the table sideways to see every column.
Branch Network
View all 4 branches → Branch count from the FDIC Summary of Deposits, June 30, 2026. The domestic office count above is the FDIC's current figure, so the two can differ.
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Security Bank (main office) | New Auburn , WI | 54757 | $124.4M |
| Ridgeland Office Branch | Ridgeland , WI | 54763 | $41.2M |
| Bloomer Office | Bloomer , WI | 54724 | $40.9M |
| Sand Creek Branch | Sand Creek , WI | 54765 | $9.8M |
Events & Regulatory History
Mergers, charter changes, enforcement actions, FDIC assistance, and (if applicable) failure events recorded against this institution. Click a year to see what else was happening across US banking that year.
| Date | Category | Event | Source |
|---|---|---|---|
| February 20, 2007 | Structure Change | Acquired Farmers State Bank Charter Retained (Merger or Purchase & Assumption) for the acquired bank | FFIEC NIC |
Sourced from the bank event history (FDIC, Federal Reserve NIC, OCC, and OTS). Showing the most recent 1 event.
Regulatory record
Facts as filed or published, not a rating.
- Deposit market share
- 0.1% of deposits in WI, rank 119 of 185 institutions
- Period: June 30, 2026. Source: FDIC Summary of Deposits.
- Mortgage lending (HMDA)
- 92 applications, 74 loans originated, $19.3M originated, across 1 states
- Period: Calendar year 2025. Source: FFIEC HMDA loan application register.
- SBA 7(a) lending
- 1 loans, $409K approved, $409K average. 0.00% of that year's loans have since been charged off
- Period: Federal fiscal year 2002 (October to September). Source: SBA 7(a) and 504 loan data (FOIA).
- Not on file
- Enforcement actions, Consumer complaints, CFPB enforcement, CRA examination rating. No record from these sources, which is not the same as a clean record. Sources
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Frequently asked about Security Bank
What are Security Bank's total assets?
As of the Q2 2026 filing, Security Bank reported total assets of $253.8 million in its FFIEC call report.
Where is Security Bank headquartered?
It is headquartered in New Auburn, WI, United States.
When was Security Bank founded?
It was established in 1907, per the FDIC institution directory.
Is Security Bank FDIC-insured?
Yes. It is an FDIC-insured commercial bank (FDIC Certificate #10015). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category, per FDIC rules.
Who regulates Security Bank?
Security Bank's primary federal regulator is the FDIC.
How many branches does Security Bank operate?
It operates 4 domestic offices, per the FDIC institution directory. That count includes administrative and limited-service offices as well as full-service branches.
What is Security Bank's Texas Ratio?
Its Texas Ratio is 8.56% in its Q2 2026 call report, within the healthy range (at or below 50%, the level at which problem assets reach half of the capital cushion). The Texas Ratio measures non-performing assets against the bank's capital and reserves.
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