| FNFormer / No Longer Operating Here Twin City Fan Companies LTD. | Sioux Falls | — | ◇ UNVERIFIED |
| HMHansen Manufacturing Dba Hi-roller Conveyors | Sioux Falls | — | ◇ UNVERIFIED |
| HRHi Roller Conveyors | Sioux Falls | — | ◇ UNVERIFIED |
| HCHub City INC | Aberdeen | — | ◇ UNVERIFIED |
| MFMeyerink Farm Service INC. | Platte | — | ◇ UNVERIFIED |
| SESpartan Erv | Brandon | — | ◇ UNVERIFIED |
| SMSpecialty Manufacturing Company INC. | Bath | — | ◇ UNVERIFIED |
| TSTerex South Dakota | Watertown | — | ◇ UNVERIFIED |
| TSTerex South Dakota - Main Plant | Watertown | — | ◇ UNVERIFIED |
| TCTwin City Fan Companies LTD - Brookings Plant | Brookings | — | ◇ UNVERIFIED |
| WEWoods Equipment CO | Sioux Falls | — | ◇ UNVERIFIED |
| 2C21st Century Mfg. | Lake Preston | 20–99 | ◐ LIKELY ACTIVE |
| AMAberdeen Machine Tool Inc. | Aberdeen | 20–99 | ◐ LIKELY ACTIVE |
| AMAbilene Machine, LLC Sioux Falls | Sioux Falls | 1–19 | ◐ LIKELY ACTIVE |
| AHAGI Hansen Hi Roller | Sioux Falls | 100–499 | ◐ LIKELY ACTIVE |
| AIAstec Industries, Yankton | Yankton | 100–499 | ◐ LIKELY ACTIVE |
| CECrenlo Engineered Cabs | Watertwon | 100–499 | ◐ LIKELY ACTIVE |
| EMEnertech Mitchell | Mitchell | 20–99 | ◐ LIKELY ACTIVE |
| FWFeuillerat Welding, LLC | Rapid City | — | ◐ LIKELY ACTIVE |
| FIFimco INC | North Sioux City | — | ◐ LIKELY ACTIVE |
| FPFIMCO Plants | North Sioux City | 100–499 | ◐ LIKELY ACTIVE |
| FMFirst Manufacturing, LLC - Humboldt | Humboldt | 1–19 | ◐ LIKELY ACTIVE |
| FIFlagshooter, Inc | Sioux Falls | 20–99 | ◐ LIKELY ACTIVE |
| MMMDS Mfg. Co. | MDS Mfg. Co. | 20–99 | ◐ LIKELY ACTIVE |
| NSNt Sales and Leasing, INC. | Watertown | — | ◐ LIKELY ACTIVE |
| OHOvb Holdings, LLC | Huron | — | ◐ LIKELY ACTIVE |
| OHOVB HOLDINGS LLC DBA OVERBUILT and DBA EASIPOUR | Huron | 20–99 | ◐ LIKELY ACTIVE |
| PMPFG Manufacturing OLM Food Systems Sioux Falls - 4040 | Sioux Falls | 100–499 | ◐ LIKELY ACTIVE |
Prince Manufacturing Corporation-Brookings | Brookings | 1–19 | ◐ LIKELY ACTIVE |
Prince Manufacturing Corporation-North Sioux City Campus | North Sioux City | 20–99 | ◐ LIKELY ACTIVE |
Prince Manufacturing Corporation-Yankton | Yankton | 20–99 | ◐ LIKELY ACTIVE |
| PFProForm Fabrication, LLC | Beresford | 20–99 | ◐ LIKELY ACTIVE |
Pro Line, INC. - Watertown | Watertown | — | ◐ LIKELY ACTIVE |
| PDPro-Tec Division | Lennox | 20–99 | ◐ LIKELY ACTIVE |
| SDSchlosser Ditching & Plumbing INC | Timber Lake | — | ◐ LIKELY ACTIVE |
| STSchuurmans, Terry | Avon | — | ◐ LIKELY ACTIVE |
| SSSioux Steel Livestock | Lennox | 20–99 | ◐ LIKELY ACTIVE |
| SSSukup South Dakota Distribution Center | Watertown | 1–19 | ◐ LIKELY ACTIVE |
| TITeamco INC. | Tea | 1–19 | ◐ LIKELY ACTIVE |
| TBTerex Bidwell | Canton | 20–99 | ◐ LIKELY ACTIVE |
| THTerex - Huron | Huron | 100–499 | ◐ LIKELY ACTIVE |
| TWTerex - Watertown | Watertown | 500+ | ◐ LIKELY ACTIVE |
| VCVermeer Corporation - Freeman | Freeman | 20–99 | ◐ LIKELY ACTIVE |
| VMVern's Manufacturing, INC. | Wessington | — | ◐ LIKELY ACTIVE |
Walman Optical | Sioux Falls | 1–19 | ◐ LIKELY ACTIVE |
| WAWelding Accessories and Cutting - Watertown | Watertown | 20–99 | ◐ LIKELY ACTIVE |
| SMSunderman Manufacturing Company | Baltic | — | ◇ UNVERIFIED |
| ATAero Trailers LLC | Watertown | — | ◇ UNVERIFIED |
| AMAgile Manufacturing Group, Inc. | Worthing | — | ◇ UNVERIFIED |
| AIAlvord-polk Inc., Property | Lake Preston | — | ◇ UNVERIFIED |