First Security Bank (Byron, MN)
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Data as of · sourced from FFIEC call reports. How we update
First Security Bank is an FDIC-insured commercial bank headquartered in Byron, MN, established in 1904 (FDIC certificate 9728), and it is supervised by the FDIC. At Q2 2026 it reported total assets of $161.7M, up 5.8% from Q2 2025, the 128th largest of 221 banks headquartered in Minnesota. Its CET1 capital ratio was 10.82% at Q2 2026, above regulatory requirements.
- Charter
- Commercial bank
- Regulator
- FDIC
- Deposit insurance
- FDIC
- FDIC certificate
- 9728
- Headquarters
- Byron, MN
- Established
- 1904
- Total assets, Q2 2026
- $161.7M
- Assets vs Q2 2025
- +5.8%
- CET1 ratio, Q2 2026
- 10.82%
- Domestic offices
- 1 FDIC institution directory, current count
- Routing number
- 091906760
- Holding company
- OLMSTED BANCORPORATION, INC.
- Asset rank in state
- 128th of 221 in Minnesota
Problem loans are rising at First Security Bank. It reported $162 million in assets at June 30, 2026, up 5.8% from a year earlier. Loans on nonaccrual or 90 or more days past due, net of government guarantees, rose to 2.63% of loans from 0.24% a year earlier. It returns 25.3% a year on shareholders' equity, about double the median of 12.5% for the 2,660 banks with $100 million to $1 billion in assets. On the other hand, it holds common equity equal to 10.82% of its risk-weighted assets, lower than about 9 in 10 banks its size (median 15.12%).
Earnings jumped: net income for the quarter was $706,000, 50% above the same quarter a year earlier. Over the same year, loans grew 2.8% and deposits grew 7.0%. Credit is the area to watch: it carries problem assets equal to 24.5% of the capital and reserves that would absorb them, 9.3 times the median of 2.6% for banks its size.
As of June 30, 2026, First Security Bank reported a CET1 capital ratio of 10.82%, a return on assets of 1.79%, a nonperforming-loan ratio of 2.63% and a Texas ratio of 24.50%. The figures come from its call report filed with the FFIEC.
First Security Bank ranks as the 128th largest of the 221 banks based in Minnesota, by total assets at Q2 2026. From Q1 2026 to Q2 2026, its total assets rose 1.6% to $161.7M, loans fell 1.0% and deposits rose 1.1%. 1-4 family residential loans made up 58.2% of its total loans on June 30, 2026, its largest category; next came construction and land development loans at 12.1%. Its one office in the FDIC Summary of Deposits is in Byron, MN. On its Q2 2026 call report, First Security Bank meets every capital ratio test for well capitalized.
Headquarters Profile
- Address
- 316 Byron Ave N, Byron, MN 55920
- County
- Olmsted
- Metro Area
- Rochester, MN
- Charter
- Commercial bank, state charter, Fed non-member, FDIC-supervised
- Primary Regulator
- FDIC
- FDIC Region
- Kansas City (Region 11)
- Federal Reserve member
- No
- Federal Reserve district
- District 9, Minneapolis
- Fiduciary (trust) powers
- —
- Call Report form
- FFIEC 051
- Established
- December 27, 1904
- Domestic offices
- 1 FDIC institution directory, current count
- Employees (FTE)
- 11
- Domestic deposits
- $121.6M
- Allowance for credit losses
- $1.7M
- Net charge-offs (YTD)
- $89K
- Average total assets
- $157.8M
- Average total loans
- $119.4M
- Average interest-bearing deposits
- $93.9M
- Tax status
- Subchapter S
- Ownership
- Stock
- Community bank
- Yes
- FDIC-insured since
- January 1, 1934
- FDIC Cert
- 9728
- Fed RSSD
- 109154
- Website
- WWW.fsbbyron.com →
- Parent Holding Company
- OLMSTED BANCORPORATION, INC. (RSSD 1129001)
Profitability
Q2 annualizedCapital & Liquidity
Balance 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. How we compute these figures
Quarterly trends
From Q3 2023 to Q2 2026, First Security Bank's total assets ranged from $122.7M (Q3 2023) to $161.7M (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
$161.7M total assets against $152.9M; $150.4M total liabilities against $142.7M.
$120.0M net loans and leases against $117.0M; $121.6M total deposits against $113.6M.
$26.2M securities against $23.4M; $10.7M cash and balances due against $8.1M.
$2.4M total interest income against $2.2M; $964K total interest expense against $1.0M.
$1.4M net interest income against $1.2M.
$110K total noninterest income against $76K; $774K total noninterest expense against $709K.
$18K provision for credit losses against $68K.
$706K net income against $471K.
1.79% return on assets against 1.27%; 3.79% net interest margin against 3.27%.
10.82% CET1 capital ratio against 10.04%; 7.93% tier 1 leverage ratio against 7.77%.
Inside the full First 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.
First Security Bank rankings
Its closest position to the top of a national ranking is 106 of 3,640, for Texas Ratio; its furthest is 1,992 of 2,134, for CET1 ratio.
Quarterly trend: last 8 quarters
Across the 8 quarters to Q2 2026, its return on assets ran from 0.33% (Q1 2026) to 1.79% (Q2 2026) and its net interest margin ran from 3.04% (Q4 2024) to 3.79% (Q2 2026).
| Quarter | CET1 | ROA | NPL | Texas | NIM |
|---|---|---|---|---|---|
| Q2 2026 | 10.82% | 1.79% | 2.63% | 24.50% | 3.79% |
| Q1 2026 | 10.55% | 0.33% | 2.64% | 26.21% | 3.32% |
| Q4 2025 | 10.62% | 1.32% | 0.16% | 2.18% | 3.48% |
| Q3 2025 | 10.69% | 1.30% | 0.16% | 2.14% | 3.40% |
| Q2 2025 | 10.04% | 1.27% | 0.24% | 2.49% | 3.27% |
| Q1 2025 | 10.38% | 1.18% | 0.13% | 1.36% | 3.31% |
| Q4 2024 | 10.14% | 1.03% | 0.53% | 5.76% | 3.04% |
| Q3 2024 | 9.89% | 1.37% | 0.44% | 4.63% | 3.16% |
Swipe the table sideways to see every column.
Branch Network
View the branch → 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 |
|---|---|---|---|
| First Security Bank (main office) | Byron , MN | 55920 | $121.6M |
Regulatory record
Facts as filed or published, not a rating.
- Deposit market share
- <0.1% of deposits in MN, rank 171 of 277 institutions
- Period: June 30, 2026. Source: FDIC Summary of Deposits.
- Mortgage lending (HMDA)
- 39 applications, 39 loans originated, $11.4M originated, across 3 states
- Period: Calendar year 2025. Source: FFIEC HMDA loan application register.
- SBA 7(a) lending
- 2 loans, $3.6M approved, $1.8M average. 0.00% of that year's loans have since been charged off
- Period: Federal fiscal year 2024 (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 First Security Bank
What are First Security Bank's total assets?
As of the Q2 2026 filing, First Security Bank reported total assets of $161.7 million in its FFIEC call report.
Where is First Security Bank headquartered?
It is headquartered in Byron, MN, United States.
When was First Security Bank founded?
It was established in 1904, per the FDIC institution directory.
Is First Security Bank FDIC-insured?
Yes. It is an FDIC-insured commercial bank (FDIC Certificate #9728). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category, per FDIC rules.
Who regulates First Security Bank?
First Security Bank's primary federal regulator is the FDIC.
What is First Security Bank's CET1 capital ratio?
It reported a Common Equity Tier 1 (CET1) capital ratio of 10.82% in its Q2 2026 call report, above regulatory requirements.
How many branches does First Security Bank operate?
It operates 1 domestic office, per the FDIC institution directory. That count includes administrative and limited-service offices as well as full-service branches.
What is First Security Bank's Texas Ratio?
Its Texas Ratio is 24.50% 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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