WOLFF'S PLUMBING & HEATING, INC. is a South Dakota corporation, registered on January 17, 1979. It is based at 614 S 32ND STREET, SPEARFISH, SD, 57783. The company is currently listed as active on the South Dakota register, is registered under company number DB016355 and carries EIN 460371092. Public records for the company include 1 SoS registration, 2 federal contracts, 1 loan record and 12 Form 5500 filings. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | WOLFF'S PLUMBING & HEATING, INC. |
|---|---|
| Principal address | 614 S 32ND STREETSPEARFISH57783SDUnited States |
| Mailing address | PO BOX 97, SPEARFISH, SD, 57783-0097 |
| Registration state | South Dakota |
| Status | Active |
| Registered | 17 January 1979 (over 47 years ago) |
| Entity type | Corporation |
| Standing | compliant |
| Company number | DB016355 |
| EIN | 460371092 |
| Employees (modeled) | ≈58 employees2025 |
| Registered agent | ROGER A. TELLINGHUISEN |
| Source registry | South Dakota Secretary of State · updated 15 June 2026 |
|---|
| Public records | 1 SoS registration |
|---|
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| Est. revenue (modeled) | $11M2025 |
|---|---|
| Federal contracts | $52K · 6 awards |
| SBA loans | $416K · approved amounts |
| Total obligated | $52K |
|---|---|
| Awards | 6 |
| Top agency | Department of the Interior |
| Action date | Agency | Obligated | |
|---|---|---|---|
| 2020-05-14 | Department of the Interior | $8K | |
| 2020-05-04 | Department of Agriculture | $9K | |
| 2019-05-02 | Department of Veterans Affairs | $7K | |
| 2017-03-21 | Department of Agriculture | $0 | |
| 2017-03-03 | Department of Agriculture | $8K | |
| 2016-09-20 | Department of the Interior | $19K | |
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| South DakotaTHIS | WOLFF'S PLUMBING & HEATING, INC. | 1979-01-17 | ROGER A. TELLINGHUISEN | — | Active | |
Filing ID DB016355 Jurisdiction Domestic · Corporation Principal address 614 S 32ND STREET, SPEARFISH, SD, 57783 Registered agent ROGER A. TELLINGHUISEN516 5TH STREET, RAPID CITY, SD, 57701 Officers Not reported | ||||||
| Montana | WOLFF'S PLUMBING & HEATING, INC. | 1984-08-15 | JERRY EVENSON | GREGORY A HARTMANOfficerDIANE R HARTMANOfficer2 more | Revoked | |
| Montana | WOLFF'S PLUMBING & HEATING, INC. | 2006-04-24 | GREGORY PETERSON | DAN HARTMANDirector, OfficerBEN ARAMBELDirector, Officer | Active | |
| North Dakota | WOLFF'S PLUMBING & HEATING, INC. | 1983-07-06 | KEITH A CLEVELAND | — | Active | |
| Wyoming | Wolff's Plumbing & Heating, Inc. | 2006-07-24 | Ben Arambel | — | Active | |
Companies and people linked to WOLFF'S PLUMBING & HEATING, 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.
| Amount | Approved | Lender | Jobs | Status | |
|---|---|---|---|---|---|
| $416,000 | 04/05/2020 | Black Hills Community Bank, National Association | 35 | Paid in Full | |
Employee-benefit plan filings by WOLFF'S PLUMBING & HEATING, 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) | ≈58 · plan year 2025 |
|---|---|
| Est. annual revenue (modeled) | $11M |
| Retirement plan assets | $2.9M |
| Benefit plans | 401(k) plan on file |
| Filing history | 27 plan years filed, 1999–2025 |
| Sponsor EIN | 46-0371092 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2025 | ≈58 | 62 (52 active) | $2.9M | $11M | 401(k) | |
| 2024 | ≈50 | 55 (45 active) | $2.3M | $9.5M | 401(k) | |
| 2023 | ≈46 | 46 (41 active) | $1.9M | $8.7M | 401(k) | |
| 2022 | ≈42 | 43 (38 active) | $1.5M | $8.2M | 401(k) | |
| 2021 | ≈37 | 37 (33 active) | $1.6M | $6.8M | 401(k) | |
| 2020 | ≈38 | 38 (34 active) | $1.4M | $6.3M | 401(k) | |
| 2019 | ≈34 | 32 (31 active) | $1.2M | $5.5M | 401(k) | |
| 2018 | ≈43 | 40 (39 active) | $960,101 | $7.1M | 401(k) | |
| 2017 | ≈40 | 39 (36 active) | $975,994 | $6.8M | 401(k) | |
| 2016 | ≈36 | 33 (32 active) | $749,879 | $6.1M | 401(k) | |
Matched Form 5500 filing records:
| Plan | Plan year | Participants | EIN | |
|---|---|---|---|---|
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
| WOLFF'S PLUMBING & HEATING, INC. 401(K) SAVINGS PLAN AND TRUST | — | — | — | |
Federal court records load when you reach this section.
1 company is registered at 614 S 32ND STREET, SPEARFISH — shared registered-office and agent addresses are common; a shared address alone does not link businesses.
Netstate aggregates public records from federal, state and municipal sources; records are matched to this company by its registered legal names. Latest source snapshot 2026-06-16. Document getpalm-companies/4014-4353-8594.