Operating signal within 12 months from two or more independent sources.
What they make
Industrial Gas Manufacturing325120- decades
- focusing
- efficient production
- high-tech electronics
- cell phones
- solar panels
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Dow Corning CORP Healthcare Inds Materials Site | Hemlock | All Other Basic Organic Chemical Manufacturing 325199 | LIKELY ACTIVE | 0.7 KM |
| Specialty Manufacturing Inc | Saginaw | All Other Basic Organic Chemical Manufacturing 325199 | ACTIVE | 8.9 KM |
| Dow Silicones Corporation | Midland | All Other Basic Organic Chemical Manufacturing 325199 | ACTIVE | 17.3 KM |
| Dow Silicones Corporation | Auburn | All Other Basic Organic Chemical Manufacturing 325199 | LIKELY ACTIVE | 17.7 KM |
| Michigan Operations- Auburn Plant | Auburn | All Other Basic Organic Chemical Manufacturing 325199 | LIKELY ACTIVE | 17.9 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
6 sources hold this plant, and 12 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 AIR, AIRS/AFS, BR, CEDRI, E-GGRT, EIS, ICIS, NCDB, NPDES, OSHA-OIS, RCRAINFO, TRIS, TSCA · EPA site type STATIONARY.
- The company’s own websiteOPERATINGfirst seen JUL 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord HWU8LKK17RL9 · first seen APR 2026 · last seen APR 2026
- OSHA injury and illness reportsOPERATINGRecord 47748 · first seen DEC 2025 · last seen DEC 2025
- EPA Toxics Release InventoryOPERATINGfirst seen DEC 2023 · last seen DEC 2024
- DOL Form 5500 retirement plan filingsOPERATINGRecord 382236227|MI|48626|12334 geddes rd · first seen DEC 2024 · last seen DEC 2024
- EPA Facility Registry ServiceEXISTENCERecord 110000407783 · first seen JAN 2015 · last seen OCT 2017
ALSO RECORDED ASLINDE - HEMLOCK MI; PRAXAIR - HEMLOCK MI
IN SAGINAW COUNTY2 other plants share this one’s industry (Basic Chemical Manufacturing, NAICS 3251); 1 of them has 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: HEMLOCK SEMICONDUCTOR OPERATIONS LLC · JUL 2026 · ON THIS PAGE
- SAM.gov: HEMLOCK SEMICONDUCTOR OPERATIONS LLC · APR 2026 · ON THIS PAGE
- Street addressSOURCES DISAGREE
- EPA: 12334 GEDDES RD., P.O. BOX 80 · JUL 2026
- SAM.gov: 12334 GEDDES RD · APR 2026 · ON THIS PAGE
- City
- EPA: HEMLOCK · JUL 2026 · ON THIS PAGE
- SAM.gov: HEMLOCK · APR 2026 · ON THIS PAGE
- State
- EPA: MI · JUL 2026 · ON THIS PAGE
- SAM.gov: MI · APR 2026 · ON THIS PAGE
- County (FIPS code)
- EPA: 26145 · SEP 2026
- Coordinates
- Census geocoder: 43.430999700186,-84.15733843487 · JUL 2026 · ON THIS PAGE
- EPA: 43.430944,-84.157228 · JUL 2026 · ON THIS PAGE
- Employees (band)
- OSHA: 500+ · DEC 2025
- Website
- SAM.gov: hscpoly.com · APR 2026
- CAGE code
- SAM.gov: 9KT53 · APR 2026
- Retirement plan filing (Form 5500)
- DOL: 1,543 active participants, plan year ending 2024-12-31, 3 plan(s) · DEC 2024
- SAM registration expires
- SAM.gov: 2027-04-16 · APR 2026
- State business registration
- DC Corporations: Hemlock Semiconductor Operations LLC, registered with the District of Columbia Corporations Division; Limited liability company; registered 2022-08-09; active, annual report filed 2025-03-20 · MAR 2025