FSB BANCORP, INC. is a South Dakota corporation, registered on December 20, 2005. It is based at 309 S PHILLIPS AVE, SIOUX FALLS, SD, 57104-6345. The company has since been marked dissolved on the South Dakota register, is registered under company number DB050426 and carries EIN 420247020. Public records for the company include 1 SoS registration. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | FSB BANCORP, INC. |
|---|---|
| Principal address | 309 S PHILLIPS AVESIOUX FALLS57104-6345SDUnited States |
| Registration state | South Dakota |
| Status | Dissolved |
| Registered | 20 December 2005 (over 20 years ago) |
| Entity type | Corporation |
| Standing | not compliant |
| Company number | DB050426 |
| EIN | 420247020 |
| Employees (modeled) | ≈27 employees2025 |
| Registered agent | C T CORPORATION SYSTEM |
| Source registry | South Dakota Secretary of State · updated 15 June 2026 |
| Public records |
| 1 SoS registration |
The name “FSB Bancorp, Inc.” matches an entry on a sanctions list in the OpenSanctions data (us_fed_enforcements). This is a name match only and may reflect a different entity — confirm identity against the underlying record before relying on it.
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| Est. revenue (modeled) | $9.3M2025 |
|---|
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| South DakotaTHIS | FSB BANCORP, INC. | 2005-12-20 | C T CORPORATION SYSTEM | — | Dissolved | |
Filing ID DB050426 Jurisdiction Domestic · Corporation Principal address 309 S PHILLIPS AVE, SIOUX FALLS, SD, 57104-6345 Registered agent C T CORPORATION SYSTEM319 S COTEAU ST, PIERRE, SD, 57501-3187 Officers Not reported | ||||||
Companies and people linked to FSB BANCORP, INC. in the state registers through shared officers, a shared registered agent, shared filing contacts or a shared address. Service companies file for many unrelated businesses — a shared agent, address or contact alone does not prove affiliation.
company person group former role
Browse the indexed registries by state, or look up any debtor name free, at UCC lien search.
Employee-benefit plan filings by FSB BANCORP, INC. with the Department of Labor. Employee and revenue figures are modeled estimates derived from retirement-plan participant counts and industry ratios — not official headcount or reported revenue.
| Employees (modeled) | ≈27 · plan year 2025 |
|---|---|
| Est. annual revenue (modeled) | $9.3M |
| Retirement plan assets | $2.1M |
| Benefit plans | 401(k) plan on file |
| Filing history | 15 plan years filed, 1999–2025 |
| Sponsor EIN | 42-0247020 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2025 | ≈27 | 34 (24 active) | $2.1M | $9.3M | 401(k) | |
| 2024 | ≈26 | 32 (23 active) | $1.7M | $8.3M | 401(k) | |
| 2023 | ≈30 | 34 (27 active) | $1.3M | $10.5M | 401(k) | |
| 2022 | ≈28 | 35 (25 active) | $925,982 | $9.5M | 401(k) | |
| 2021 | ≈31 | 31 (28 active) | $1.1M | $10.2M | 401(k) | |
| 2020 | ≈31 | 33 (28 active) | $842,340 | $10.5M | 401(k) | |
| 2019 | ≈32 | 29 (29 active) | $652,679 | $10.2M | 401(k) | |
| 2006 | ≈13 | 12 | — | $5M | 401(k) | |
| 2005 | ≈13 | 14 (12 active) | $3,503 | $1.3M | 401(k) | |
| 2004 | ≈14 | 16 (13 active) | $114,742 | $1.9M | 401(k) | |
Federal court records load when you reach this section.
Companies adjacent to FSB BANCORP, INC. in the South Dakota Secretary of State register, in alphabetical order.
Netstate aggregates public records from federal, state and municipal sources; records are matched to this company by its registered legal names. Latest source snapshot 2026-06-17. Document getpalm-companies/2272-7849-9027.