American Bank & Trust
Sioux Falls, South Dakota, Lincoln County
$2.2B in total assets, the 567th largest of 4,309 US banks and 10th of 58 headquartered in South Dakota.
- FDIC certificate
- 1117
- Established
- 1892
- Owned by
- Leackco Bank Holding Co Inc
- Primary regulator
- FDIC
- Website
- www.abt.bank
At a glance
Compared with 16 banks headquartered in South Dakota with $1 billion to $10 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $2.2B | 56% | $2.1B | |
| Loans | $1.6B | 56% | $1.6B | |
| Deposits | $2.0B | 56% | $1.7B | |
| Return on assets | 1.35% | 44% | 1.44% | |
| Net interest margin | 3.82% | 38% | 4.02% | |
| Efficiency ratio | 53.4% | 25% | 60.6% | |
| Equity to assets | 10.92% | 62% | 10.12% | |
| Loans to deposits | 82% | 27% | 90% |
Growth
Total assets grew 12.9% a year over the last 5 years and 13.5% a year over 10 years, including 2 acquisitions in the last 10 years.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Jul 2023 | Valley Exchange Bank Lennox, SD | $69M |
| Jul 2018 | Farmers State Bank Stickney, SD | $113M |
| May 2014 | American State Bank of Pierre Pierre, SD, an affiliate under the same holding company | $164M |
| Dec 2012 | Mansfield State Bank Mansfield, SD | $13M |
| Oct 2011 | Peoples State Bank De Smet, SD | $63M |
| Jun 2000 | Hand County State Bank Miller, SD | $49M |
| Jan 1994 | Farmers State Bank of Mellette Mellette, SD | $7M |
Where they operate
20 branches in 14 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Hughes County, SD | $392M | 23.5% | 2 of 5 |
| Minnehaha County, SD | $301M | 0.1% | 10 of 26 |
| Beadle County, SD | $271M | 51.9% | 1 of 5 |
| Kingsbury County, SD | $178M | 59.0% | 1 of 5 |
| Codington County, SD | $159M | 10.0% | 6 of 10 |
| Lincoln County, SD | $159M | 0.0% | 8 of 26 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
Net gain of 11 branches since 2016 (9 to 20, +122.2%). 12 opened, 5 acquired, 6 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 9 | |||
| 2016 | Opened Sioux FallsClosed Huron | 1 | 1 | 0 | 9 |
| 2017 | Opened Sioux FallsClosed Sioux Falls | 2 | 1 | +1 | 10 |
| 2018 | Acquired Farmers State Bank | 3 | 0 | +3 | 13 |
| 2020 | Opened Sioux Falls | 1 | 0 | +1 | 14 |
| 2021 | Opened Watertown and Worthington | 2 | 0 | +2 | 16 |
| 2022 | Opened Aberdeen and Wessington SpringsClosed Alpena and Sioux Falls | 2 | 2 | 0 | 16 |
| 2023 | Acquired Valley Exchange BankOpened Watertown, closed Watertown | 3 | 1 | +2 | 18 |
| 2024 | Opened Lisbon | 1 | 0 | +1 | 19 |
| 2025 | Opened Sioux Falls and TeaClosed Tea | 2 | 1 | +1 | 20 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Agricultural | 25% | 7% | |
| Commercial real estate | 23% | 24% | |
| Business (C&I) | 17% | 18% | |
| Multifamily | 11% | 8% | |
| 1-4 family residential | 9% | 12% | |
| Farmland | 8% | 7% | |
| Construction and land | 4% | 7% | |
| Consumer | 2% | 13% | |
| Other | 2% | 4% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 50% | 43% | |
| Time deposits | 37% | 25% | |
| Noninterest-bearing | 13% | 33% |
Brokered deposits are 0.0% of deposits (peers 8.5%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.57% | 0.87% |
| Net charge-offs, annualized | 0.01% | 0.23% |
| Reserves to loans | 1.14% | 1.25% |
| Leverage ratio | 11.28% | 10.35% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in South Dakota
Largest competitors in Hughes County, SD
Figures as of June 30, 2026 from the bank's Call Report, FDIC structure and branch data, and the Federal Reserve. Short link: bankingstats.com/banks/american-bank-trust-sioux-falls-sd