Security Bank Midwest
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Data as of · sourced from FFIEC call reports. How we update
Security Bank Midwest is an FDIC-insured commercial bank headquartered in Tyndall, SD, established in 1932 (FDIC certificate 485), and it is supervised by the FDIC. At Q2 2026 it reported total assets of $304.1M, down 7.2% from Q2 2025, the 28th largest of 56 banks headquartered in South Dakota. It reports no CET1 ratio; its Tier 1 leverage ratio was 10.52% 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
- 485
- Headquarters
- Tyndall, SD
- Established
- 1932
- Total assets, Q2 2026
- $304.1M
- Assets vs Q2 2025
- -7.2%
- Tier 1 leverage ratio, Q2 2026
- 10.52%
- Domestic offices
- 6 FDIC institution directory, current count
- Routing number
- 091408695
- Holding company
- MIDWEST BANCSHARES, INC.
- Asset rank in state
- 28th of 56 in South Dakota
Problem loans are rising at Security Bank Midwest. Its balance sheet stood at $304 million at June 30, 2026, down 7.2% from a year earlier; it is based in Tyndall, South Dakota. Loans on nonaccrual or 90 or more days past due, net of government guarantees, rose to 0.40% of loans from 0.00% a year earlier. It lost 5.9% of its deposits over the year, lower than about 9 in 10 of the 2,660 banks with $100 million to $1 billion in assets (median 4.0%). It also holds commercial real estate loans equal to only 27% of its capital, a small fraction of the median of 1.2 times for banks its size.
Net income for the quarter slipped 29% from a year earlier, to $415,000. Over the same year, loans shrank 1.5% and deposits shrank 5.9%. Costs are the weak spot: it spends about 81 cents to bring in each dollar of revenue, higher than about three-quarters of banks its size (median 61 cents).
As of June 30, 2026, Security Bank Midwest reported a return on assets of 0.54%, a nonperforming-loan ratio of 0.40% and a Texas ratio of 2.72%. The figures come from its call report filed with the FFIEC.
By total assets at Q2 2026, Security Bank Midwest is the 28th largest of the 56 banks headquartered in South Dakota. Between Q1 2026 and Q2 2026, its total assets fell 5.5% to $304.1M, loans rose 0.9% and deposits fell 3.0%. The largest part of its loan book on June 30, 2026 was agricultural production loans, at 51.7% of total loans, ahead of farmland and other real estate loans at 26.4%. The FDIC Summary of Deposits lists 6 offices for it, in 6 cities across 2 states; its Tyndall office books 39% of its branch deposits. Judged on its Q2 2026 call report, Security Bank Midwest meets the community bank leverage ratio test for well capitalized.
Headquarters Profile
- Address
- 1600 Main St, Tyndall, SD 57066
- County
- Bon Homme
- 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
- November 1, 1932
- Former names
- Security State Bank (2006-2021)
- Domestic offices
- 6 FDIC institution directory, current count
- Employees (FTE)
- 32
- Domestic deposits
- $238.8M
- Allowance for credit losses
- $3.0M
- Net charge-offs (YTD)
- $0
- Average total assets
- $306.2M
- Average total loans
- $215.7M
- Average interest-bearing deposits
- $194.7M
- Tax status
- Subchapter S
- Ownership
- Stock
- Community bank
- Yes
- FDIC-insured since
- January 1, 1934
- FDIC Cert
- 485
- Fed RSSD
- 435255
- SEC CIK
- 1684138 → filed by MIDWEST BANCSHARES, INC.
- Website
- www.sbmidwest.bank →
- Parent Holding Company
- MIDWEST BANCSHARES, INC. (RSSD 4347301)
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 Midwest reports no risk-based capital ratios; its Tier 1 leverage ratio applies. How we compute these figures
Quarterly trends
From Q3 2023 to Q2 2026, Security Bank Midwest's total assets ranged from $292.8M (Q3 2023) to $344.3M (Q4 2024), 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
$304.1M total assets against $327.7M; $275.5M total liabilities against $301.1M.
$212.8M net loans and leases against $216.1M; $238.8M total deposits against $253.7M.
$65.0M securities against $84.2M; $6.8M cash and balances due against $8.1M.
$4.0M total interest income against $4.5M; $1.4M total interest expense against $2.0M.
$2.5M net interest income against $2.5M.
$110K total noninterest income against $113K; $2.2M total noninterest expense against $2.0M.
No provision recorded in the last 12 quarters.
$415K net income against $586K.
0.54% return on assets against 0.71%; 3.53% net interest margin against 3.17%.
10.52% tier 1 leverage ratio against 9.45%.
Inside the full Security Bank Midwest 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.
Held-to-maturity securities carry unrealized losses worth 10–25% of book equity. Carried at amortized cost, they do not reduce reported capital, but they shrink the bank's true mark-to-market cushion if the securities ever have to be sold. BankRegReports analysis, HTM marks aren't a reported regulatory metric.
Security Bank Midwest rankings
Its closest position to the top of a national ranking is 1,952 of 3,640, for Texas Ratio; its furthest is 3,274 of 3,606, for efficiency ratio.
Quarterly trend: last 8 quarters
Across the 8 quarters to Q2 2026, its return on assets ran from 0.54% (Q2 2026) to 1.04% (Q3 2024) and its net interest margin ran from 3.17% (Q2 2025) to 3.54% (Q1 2026).
| Quarter | Leverage | ROA | NPL | Texas | NIM |
|---|---|---|---|---|---|
| Q2 2026 | 10.52% | 0.54% | 0.40% | 2.72% | 3.53% |
| Q1 2026 | 10.27% | 0.94% | 0.35% | 2.37% | 3.54% |
| Q4 2025 | 9.82% | 0.68% | 0.00% | 0.00% | 3.32% |
| Q3 2025 | 9.81% | 0.81% | 0.00% | 0.00% | 3.28% |
| Q2 2025 | 9.45% | 0.71% | 0.00% | 0.00% | 3.17% |
| Q1 2025 | 9.16% | 0.85% | 0.00% | 0.00% | 3.20% |
| Q4 2024 | 9.15% | 0.97% | 0.24% | 1.89% | 3.21% |
| Q3 2024 | 9.15% | 1.04% | 0.31% | 2.49% | 3.21% |
Swipe the table sideways to see every column.
Branch Network
View all 6 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 Midwest (main office) | Tyndall , SD | 57066 | $93.0M |
| Chancellor Branch | Chancellor , SD | 57015 | $67.1M |
| Heron Lake Br | Heron Lake , MN | 56137 | $29.2M |
| Jackson, Mn Branch | Jackson , MN | 56143 | $20.8M |
| Lennox Branch | Lennox , SD | 57039 | $19.7M |
| Viborg Branch | Viborg , SD | 57070 | $9.0M |
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 |
|---|---|---|---|
| October 1, 2013 | Merger | Participated in Absorption/Consolidation/Merger | FDIC |
| October 1, 2013 | Structure Change | Acquired Commercial Bank of Minnesota Charter Discontinued (Merger or Purchase & Assumption) for the acquired bank | FFIEC NIC |
| November 1, 2012 | Merger | Participated in Absorption/Consolidation/Merger | FDIC |
| November 1, 2012 | Structure Change | Acquired Dakota Heritage State Bank Charter Discontinued (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 4 events.
Regulatory record
Facts as filed or published, not a rating.
- Deposit market share
- <0.1% of deposits in SD, rank 39 of 82 institutions
- Period: June 30, 2026. Source: FDIC Summary of Deposits.
- SBA 7(a) lending
- 1 loans, $300K approved, $300K average. 0.00% of that year's loans have since been charged off
- Period: Federal fiscal year 2013 (October to September). Source: SBA 7(a) and 504 loan data (FOIA).
- Not on file
- Enforcement actions, Mortgage lending (HMDA), 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 Midwest
What are Security Bank Midwest's total assets?
As of the Q2 2026 filing, Security Bank Midwest reported total assets of $304.1 million in its FFIEC call report.
Where is Security Bank Midwest headquartered?
It is headquartered in Tyndall, SD, United States.
When was Security Bank Midwest founded?
It was established in 1932, per the FDIC institution directory.
Is Security Bank Midwest FDIC-insured?
Yes. It is an FDIC-insured commercial bank (FDIC Certificate #485). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category, per FDIC rules.
Who regulates Security Bank Midwest?
Security Bank Midwest's primary federal regulator is the FDIC.
How many branches does Security Bank Midwest operate?
It operates 6 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 Midwest's Texas Ratio?
Its Texas Ratio is 2.72% 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.
What was Security Bank Midwest previously called?
The charter now named Security Bank Midwest has also operated as Security State Bank (2006-2021), per FDIC structure-change records.
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