Headquartered in Byron, Minnesota, First Security Bank is a state-chartered bank with $161.7M in total assets and $121.6M in deposits as of Q2 2026. It operates 1 office. Its charter dates back to 1904.
Based on its Q2 2026 filing, First Security Bank scores 37/100, which we describe as low. That is higher than only 2% of 2,650 banks with $100 million – $1 billion. Among 223 banks headquartered in Minnesota, it ranks 219th. Its strongest component is earnings (62/100; 1.05%), and its lowest is loan quality (12/100; 2.63%).
TellerScore · Q2 2026
Scorecard
The TellerScore is our own summary of the figures this institution reports publicly; it is not issued or endorsed by any government agency. It is not a prediction, and deposits within insurance limits are protected either way.
9 quarters
Health trend
From Q2 2025 to Q2 2026, the score fell 26 points (63 → 37), mostly because the loan quality component weakened by 80 points.
Show as table
| Quarter | TellerScore |
|---|---|
| Q2 2024 | 53 |
| Q3 2024 | 58 |
| Q4 2024 | 57 |
| Q1 2025 | 64 |
| Q2 2025 | 63 |
| Q3 2025 | 64 |
| Q4 2025 | 64 |
| Q1 2026 | 30 |
| Q2 2026 | 37 |
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| Quarter | Tier 1 leverage ratio |
|---|---|
| Q2 2024 | 7.66% |
| Q3 2024 | 7.54% |
| Q4 2024 | 7.63% |
| Q1 2025 | 7.75% |
| Q2 2025 | 7.77% |
| Q3 2025 | 7.89% |
| Q4 2025 | 7.93% |
| Q1 2026 | 7.69% |
| Q2 2026 | 7.93% |
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| Quarter | Noncurrent loans |
|---|---|
| Q2 2024 | 0.74% |
| Q3 2024 | 0.44% |
| Q4 2024 | 0.53% |
| Q1 2025 | 0.13% |
| Q2 2025 | 0.24% |
| Q3 2025 | 0.16% |
| Q4 2025 | 0.16% |
| Q1 2026 | 2.64% |
| Q2 2026 | 2.63% |
Show as table
| Quarter | Return on assets |
|---|---|
| Q2 2024 | 0.70% |
| Q3 2024 | 0.93% |
| Q4 2024 | 0.95% |
| Q1 2025 | 1.17% |
| Q2 2025 | 1.21% |
| Q3 2025 | 1.24% |
| Q4 2025 | 1.26% |
| Q1 2026 | 0.33% |
| Q2 2026 | 1.05% |
| Quarter | Score | Assets | Capital | Problem loans | ROA | Loans/deposits |
|---|---|---|---|---|---|---|
| Q2 2026 | 37 | $161.7M | 7.93% | 2.63% | 1.05% | 98.6% |
| Q1 2026 | 30 | $159.1M | 7.69% | 2.64% | 0.33% | 100.7% |
| Q4 2025 | 64 | $154.3M | 7.93% | 0.16% | 1.26% | 101.1% |
| Q3 2025 | 64 | $151.1M | 7.89% | 0.16% | 1.24% | 100.5% |
| Q2 2025 | 63 | $152.9M | 7.77% | 0.24% | 1.21% | 103.0% |
| Q1 2025 | 64 | $145.6M | 7.75% | 0.13% | 1.17% | 97.7% |
| Q4 2024 | 57 | $146.5M | 7.63% | 0.53% | 0.95% | 99.3% |
| Q3 2024 | 58 | $140.5M | 7.54% | 0.44% | 0.93% | 95.3% |
| Q2 2024 | 53 | $133.9M | 7.66% | 0.74% | 0.70% | 88.4% |
2,650 peers · $100 million – $1 billion
How it compares with peers
Percentile against banks of similar size nationwide (100th = best among peers; for ratios where lower is better, the scale is flipped).
Similar-size banks in Minnesota
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| Northwestern Bank, National AssociationBank Dilworth, MN | 70 out of 100, Strong | $164.7M | 11.2% | 1.23% | vs |
| First Southeast BankBank Harmony, MN | 68 out of 100, Moderate | $158.3M | 8.4% | 0.14% | vs |
| Perennial BankBank Darwin, MN | 63 out of 100, Moderate | $158.1M | 9.5% | 1.36% | vs |
| Freeport State BankBank Freeport, MN | 77 out of 100, Strong | $165.5M | 10.7% | 0.00% | vs |
| Prime Security BankBank Karlstad, MN | 59 out of 100, Moderate | $154.5M | 8.7% | 0.52% | vs |
| State Bank of FairmontBank Fairmont, MN | 61 out of 100, Moderate | $154.2M | 10.4% | 2.03% | vs |
Deposit insurance
Is my money safe at First Security Bank?
Yes. First Security Bank is an FDIC-insured institution (FDIC certificate #9728). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
An estimated 23.7% of deposits ($28.8M) are above the $250,000 FDIC insurance limit, close to the peer median of 24%. Insured balances are protected regardless of the score.
The tier 1 leverage ratio is 7.93%, above the 5% level regulators use as the "well capitalized" benchmark for this measure. Its total risk-based capital ratio is 12.08% (benchmark: 10%).
1 location
Branches
First Security Bank lists 1 office in 1 city. Most locations:
- Byron, MN (1)
Identity & history
Profile
- Legal name
- First Security Bank
- Former names
- State Bank of Byron
- Type
- State-chartered bank
- FDIC certificate #
- 9728
- RSSD ID
- 109154
- Primary regulator
- FDIC
- Holding company
- Olmsted Bcorp Inc
- Established
- December 27, 1904
- Headquarters
- 316 Byron Ave N, Byron, MN 55920
- Website
- www.fsbbyron.com
- Employees
- 11
Quick answers
First Security Bank: common questions
Is First Security Bank FDIC insured?
Yes. First Security Bank is an FDIC-insured institution (FDIC certificate #9728). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
What is First Security Bank's TellerScore?
37 out of 100 (Low), based on its Q2 2026 publicly reported figures. The TellerScore is our own summary and is not issued by any government agency.
Has First Security Bank ever failed?
There is no failure record for FDIC certificate #9728 in the FDIC failed bank list.
How many branches does First Security Bank have?
1 office as of the latest FDIC data.
Nearby
Highest-scoring banks and credit unions with branches near Byron
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| Mayo Employees Federal Credit UnionCredit union Rochester, MN | 98 out of 100, Very strong | $1.5B | 14.9% | 0.05% | vs |
| Think Mutual BankBank Rochester, MN | 86 out of 100, Very strong | $2.2B | 16.3% | 0.25% | vs |
| Security State Bank of WanamingoBank Wanamingo, MN | 84 out of 100, Strong | $112.7M | 11.4% | 0.00% | vs |
| Premier Bank MinnesotaBank Hastings, MN | 77 out of 100, Strong | $691.5M | 10.0% | 0.04% | vs |
| Minnesota First Credit and Savings, IncorporatedBank Rochester, MN | 76 out of 100, Strong | $29.9M | 14.2% | 0.12% | vs |
| Security State Bank of KenyonBank Kenyon, MN | 76 out of 100, Strong | $72.2M | 12.6% | 0.36% | vs |