Security Bank Midwest
Tyndall, SD · Owner: Midwest Bancshares Inc
$304M
total assets, June 30, 2026
$304M
total assets, June 30, 2026
Security Bank Midwest is a state nonmember bank based in Tyndall, SD, owned by Midwest Bancshares Inc. As of June 30, 2026 it held $304.1 million in assets and $238.8 million in deposits; assets were down 7.2% from a year before. It has 6 branches in 2 states.
Updated Oct 11, 2026 · numbers as of June 30, 2026
Total assets
$304M
-7.2% in a year · -5.5% in a quarter
Deposits
$239M
-5.9% in a year · -3.0% in a quarter
Loans
$216M
-1.5% in a year · +0.9% in a quarter
Profit so far
$1.2M
Jan 1 to Jun 30, 2026 · -10.3% in a year
Capital ratio
10.52%
+1.07 pts in a year
Return on assets
0.73%
-0.04 pts in a year
Facts
- Type
- State nonmember bank
- Head office
- 1600 Main St, Tyndall, SD, 57066
- County
- Bon Homme
- Holding company
- Midwest Bancshares Inc
- Established
- Nov 1, 1932
- Employees
- 32
- Branches
- 6 in 2 states
- Website
- www.sbmidwest.bank
- Id
- b485
Quarter by quarter
March 31, 1984 to June 30, 2026
Assets, deposits and loans
Each quarter end, US dollars
Profit by quarter
Net income of each quarter, the last 12
Ratios
Percent. Return on assets and net interest margin are yearly rates.
Branches
6 offices as of June 30, 2026, holding $238.8 million in deposits
Branch map
Every branch, sized by its deposits
| State | Branches | Deposits | Share |
|---|---|---|---|
| South Dakota | 4 | $189M | 79.1% |
| Minnesota | 2 | $49.9M | 20.9% |
| Largest branches | Place | Deposits |
|---|---|---|
| Security Bank Midwest (main office) | Tyndall, SD | $93.0M |
| Chancellor Branch | Chancellor, SD | $67.1M |
| Heron Lake Br | Heron Lake, MN | $29.2M |
| Jackson, Mn Branch | Jackson, MN | $20.8M |
| Lennox Branch | Lennox, SD | $19.7M |
| Viborg Branch | Viborg, SD | $9.0M |
Related pages
Questions and answers
How big is Security Bank Midwest?
$304.1 million in total assets and $238.8 million in deposits as of June 30, 2026, with assets down 7.2% from a year before. Its loans were $215.8 million.
How many branches does Security Bank Midwest have?
6 branches in 2 states as of June 30, 2026. The most deposits are in South Dakota ($188.9 million).
Is Security Bank Midwest profitable?
Yes: it earned $1.17 million from January 1 to June 30, 2026 (down 10.3% from the same months a year before). Its return on assets was 0.73% a year; about 1% is typical.
Who owns Security Bank Midwest?
Security Bank Midwest is owned by Midwest Bancshares Inc, its holding company.
Official public data from the reports every insured bank files each quarter. Profit so far runs from January 1 to the quarter end. Branch deposits are counted once a year, as of June 30. New quarters appear about two months after the quarter ends.