Therma-stor LLC
4201 Lien Rd, Madison, WI 53704
Operating signal within 24 months, or from a single source.
- Plant closing notice effective NOV 26, 2022 · 93 employees · filed SEP 21, 2022 · CL — a federal source has recorded the plant since, so this notice does not set its status
Notices filed with the state under the federal WARN Act, as the state publishes them, collected by the WARN Act notices feed (CC BY 4.0). A notice records what the employer told the state; it is not by itself proof that the plant closed.
What they make
Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing333415Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Research Products, Madison Campus - AprilAire Plant, Tech Center | Madison | Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing 333413 | LIKELY ACTIVE | 6.3 KM |
| Research Products CORP | Madison | Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing 333410 | LIKELY ACTIVE | 6.3 KM |
| RenewAire LLC | Waunakee | Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing 333413 | LIKELY ACTIVE | 12.8 KM |
| Carnes CO | Verona | Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing 333410 | LIKELY ACTIVE | 23.8 KM |
| Research Products Corporation - Aprilaire - Poynette Plant | Poynette | Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing 333413 | LIKELY ACTIVE | 30.3 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
4 sources hold this plant, and 11 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
EPA cross-references this facility in TRIS, TSCA · EPA site type STATIONARY.
- SAM.gov entity registrationOPERATINGRecord HJ1FYYSN37V6 · first seen DEC 2025 · last seen DEC 2025
- DOL Form 5500 retirement plan filingsOPERATINGRecord 352609097|WI|53704|4201 lien rd · first seen DEC 2024 · last seen DEC 2024
- EPA Facility Registry ServiceEXISTENCERecord 110071672664 · first seen APR 2024 · last seen APR 2024
- State WARN plant-closing and layoff noticesEXISTENCEfirst seen NOV 2022 · last seen NOV 2022
IN DANE COUNTY9 other plants share this one’s industry (Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, NAICS 3334); 6 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- EPA: THERMA-STOR, LLC · JUL 2026 · ON THIS PAGE
- SAM.gov: THERMA-STOR LLC · DEC 2025 · ON THIS PAGE
- Street address
- EPA: 4201 LIEN RD · JUL 2026 · ON THIS PAGE
- SAM.gov: 4201 LIEN RD · DEC 2025 · ON THIS PAGE
- City
- EPA: MADISON · JUL 2026 · ON THIS PAGE
- SAM.gov: MADISON · DEC 2025 · ON THIS PAGE
- State
- EPA: WI · JUL 2026 · ON THIS PAGE
- SAM.gov: WI · DEC 2025 · ON THIS PAGE
- County (FIPS code)
- EPA: 55025 · SEP 2026
- Coordinates
- EPA: 43.120358,-89.312158 · JUL 2026
- Employees (band)
- DOL: 100-499 · DEC 2024
- CAGE code
- SAM.gov: 9AE16 · DEC 2025
- Retirement plan filing (Form 5500)
- DOL: 125 active participants, plan year ending 2024-12-31, 2 plan(s) · DEC 2024
- SAM registration expires
- SAM.gov: 2026-12-03 · DEC 2025
- State business registration
- TX Comptroller: THERMA-STOR LLC, registered with the Texas Comptroller of Public Accounts; Limited liability company; active