MIDWESTERN MECHANICAL, INC. is a South Dakota corporation, registered on December 20, 1991. It is based at 4105 N LEWIS AVE, SIOUX FALLS, SD, 57104-5572. The company is currently listed as active on the South Dakota register, is registered under company number DB031230 and carries EIN 421242780. Its E-Verify enrollment reports a workforce of 100 to 499 employees, hiring at 1 site in South Dakota. Public records for the company include 1 SoS registration, 3 licenses, 4 federal contracts, 2 loan records, 1 E-Verify record, 2 USDOT records and 16 Form 5500 filings. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | MIDWESTERN MECHANICAL, INC. |
|---|---|
| Principal address | 4105 N LEWIS AVESIOUX FALLS57104-5572SDUnited States |
| Registration state | South Dakota |
| Status | Active |
| Registered | 20 December 1991 (over 34 years ago) |
| Shareholders | KEN AMUNDSON, owner |
| Entity type | Corporation |
| Standing | compliant |
| Company number | DB031230 |
| EIN | 421242780 |
| Employees (modeled) |
| ≈176 employees2025 |
| Workforce size | 100 to 499 employees · updated 11 March 2011 |
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| Hiring sites | 1 site in South Dakota |
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| USDOT carrier | USDOT 1030043 · 92 power units · 150 drivers · Interstate |
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| Registered agent | DWAYNE KLARENBEEK |
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| Source registry | South Dakota Secretary of State · updated 15 June 2026 |
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| Public records | 1 SoS registration |
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| Est. revenue (modeled) | $45.8M2025 |
|---|---|
| Federal contracts | $863K · 28 awards |
| SBA loans | $3.3M · approved amounts |
| Total obligated | $863K |
|---|---|
| Awards | 28 |
| Top agency | Department of Veterans Affairs |
| Action date | Agency | Obligated | |
|---|---|---|---|
| 2026-08-03 | Department of the Interior | $16K | |
| 2026-02-23 | Department of Agriculture | $-3544 | |
| 2025-12-08 | Department of Agriculture | $137K | |
| 2024-05-14 | Department of the Interior | $19K | |
| 2017-05-19 | Department of Health and Human Services | $-1620 | |
| 2016-10-24 | Department of Health and Human Services | $-2900 | |
| 2015-12-04 | Department of Health and Human Services | $21K | |
| 2015-11-30 | Department of Health and Human Services | $0 | |
| 2015-09-17 | Department of Health and Human Services | $0 | |
| 2015-08-04 | Department of Health and Human Services | $17K | |
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| South DakotaTHIS | MIDWESTERN MECHANICAL, INC. | 1991-12-20 | DWAYNE KLARENBEEK | — | Active | |
Filing ID DB031230 Jurisdiction Domestic · Corporation Principal address 4105 N LEWIS AVE, SIOUX FALLS, SD, 57104-5572 Registered agent DWAYNE KLARENBEEK4105 N LEWIS AVE, SIOUX FALLS, SD, 57104-0499 Officers Not reported | ||||||
| Iowa | MIDWESTERN MECHANICAL, INC. | 1992-09-30 | GARY TERWEE | DAVID OLSENOfficerDWAYNE KLARENBEEKOfficer1 more | Active | |
| Minnesota | Midwestern Mechanical Inc. | 1992-10-19 | Corporation Service Company | KEN AMUNDSONOfficer | Active | |
| North Dakota | MIDWESTERN MECHANICAL, INC. | 2016-04-13 | ND Secretary of State (N.D.C.C. § 10-01.1-13) | — | Dissolved | |
| Wyoming | Midwestern Mechanical, Inc. | 2009-07-16 | — | DWAYNE KLARENBEEKOfficer | Withdrawn | |
| Wyoming | MIDWESTERN MECHANICAL, INC. | 2025-10-21 | Paracorp Incorporated | — | Active | |
Companies and people linked to MIDWESTERN MECHANICAL, 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.
| State | License / ID | Type | Issued | Status | |
|---|---|---|---|---|---|
| South Dakota | 2144-3-3 | HVAC/Mechanical | 2025-12-10 | Issued | |
| South Dakota | 2144-2-2 | Contractor | 2024-01-01 | Renewed | |
| South Dakota | 2144-1-1 | Contractor | 2023-05-19 | Renewed | |
| South Dakota | 1030043 | Interstate carrier | — | Inactive | |
| South Dakota | 1030043 | Carrier authority (USDOT) | — | Inactive | |
| Amount | Approved | Lender | Jobs | Status | |
|---|---|---|---|---|---|
| $1,584,000 | 2012-09-11 | — | — | PIF | |
| $1,707,825 | 04/07/2020 | First PREMIER Bank | 133 | Paid in Full | |
| State | Workforce | Hiring sites | Enrolled | Industry | Status | |
|---|---|---|---|---|---|---|
| South Dakota | 100 to 499 | 1 | 3/11/2011 | CONSTRUCTION (23) | Open | |
Employee-benefit plan filings by MIDWESTERN MECHANICAL, 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) | ≈176 · plan year 2025 |
|---|---|
| Est. annual revenue (modeled) | $45.8M |
| Benefit plans | 401(k) plan on file |
| Filing history | 27 plan years filed, 1999–2025 |
| Sponsor EIN | 42-1242780 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2025 | ≈176 | 165 (158 active) | — | $45.8M | Welfare | |
| 2024 | ≈308 | 349 (277 active) | $16.6M | $75.5M | 401(k) | |
| 2023 | ≈303 | 307 (273 active) | $11M | $68.8M | 401(k) | |
| 2022 | ≈302 | 296 (272 active) | $9.3M | $34.8M | 401(k) | |
| 2021 | ≈292 | 305 (263 active) | $8.3M | $64.2M | 401(k) | |
| 2020 | ≈297 | 290 (267 active) | $9.6M | $58.5M | 401(k) | |
| 2019 | ≈302 | 274 (272 active) | $8.1M | $55.9M | 401(k) | |
| 2018 | ≈297 | 268 (267 active) | $7.1M | $54.6M | 401(k) | |
| 2017 | ≈286 | 245 (257 active) | $6.1M | $50.3M | 401(k) | |
| 2016 | ≈274 | 230 (247 active) | $5.1M | $44.8M | 401(k) | |
Matched Form 5500 filing records:
| Plan | Plan year | Participants | EIN | |
|---|---|---|---|---|
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| MIDWESTERN MECHANICAL, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
Federal court records load when you reach this section.
Companies adjacent to MIDWESTERN MECHANICAL, INC. in the South Dakota Secretary of State register, in alphabetical order.
3 companies are registered at 4105 N LEWIS AVE, SIOUX FALLS — 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 2026-07-29. Document getpalm-companies/1405-9258-2635.