Thumb Bank and Trust holds $651M in total assets and has $588M in deposits across 5 counties in 1 ranked market and 1 state. Its deposit footprint is highly concentrated in Michigan: the top three counties (Huron County, Sanilac County, and Tuscola County) hold 82% of its deposits. It is among the top three banks by deposits in 2 of the 5 counties where it operates. Figures are from the FDIC Summary of Deposits as of June 30, 2025, and are refreshed once a year when the next survey is released, not quarterly.
Deposits by county
Data as of June 30, 2025 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches |
|---|---|---|---|---|
| Huron County, MI | $205M | 34.8% | 19.0% | 3 |
| Sanilac County, MI | $194M | 33.1% | 21.9% | 8 |
| Tuscola County, MI | $84M | 14.3% | 14.5% | 1 |
| Bay County, MI | $62M | 10.6% | 4.8% | 1 |
| Saginaw County, MI | $43M | 7.3% | 1.6% | 1 |
“Deposits (SOD)” are deposits as reported to the FDIC at branch level in the Summary of Deposits (SOD), June 30, 2025, and are nominal. They reflect where deposits are booked and may differ from the institution’s balance-sheet total. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total SOD deposits; “Bank’s % of County Deposits” is this institution’s deposits as a percent of all deposits booked in that county. Counties within a Combined or Metropolitan Statistical Area link to their full profile; other counties are shown for completeness.
Browse all covered institutions in the bank directory or the banks headquartered in MI. All 293 markets and the 1,523 counties with a branch within a CSA or MSA are covered in the Market Intelligence resource. See the methodology for how each figure is built and when to expect updates, or the disclaimer for how this data should, and should not, be read.
Thumb Bank and Trust is named on this page solely to describe publicly reported FDIC deposit data. Its appearance does not imply any affiliation between Thumb Bank and Trust and The Executive Recruiter Group, or endorsement by either.