Sk Siltron Css LLC

• Plant closing notice effective SEP 15, 2026 · 130 employees · Facility closure — this notice is why the plant is listed as reported closed

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

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
WEWinford Engineering, LLC	Auburn	Printed Circuit Assembly (Electronic Assembly) Manufacturing 334418	● ACTIVE	3.1 KM
Dow Silicones Corporation	Midland	All Other Basic Organic Chemical Manufacturing 325199	● ACTIVE	7.5 KM
SSSK Siltron CSS - Bay City	Bay City	Semiconductor and Related Device Manufacturing 334413	◐ LIKELY ACTIVE	8.9 KM
STSolar Technology LLC	Hemlock	Semiconductor and Related Device Manufacturing 334413	◐ LIKELY ACTIVE	17.3 KM
SHSolar Hemlock MI Corning	Hemlock	Semiconductor and Related Device Manufacturing 334413	◐ LIKELY ACTIVE	17.4 KM

Every listed plant in Bay County

Also at this address

No other federal record shares this street address.

Where this record comes from

3 sources hold this plant, and 7 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 BR, RCRAINFO · EPA site type STATIONARY.

• State WARN plant-closing and layoff noticesCLOSURE
  first seen SEP 2026 · last seen SEP 2026
• EPA ECHO compliance recordsOPERATING
  first seen SEP 2024 · last seen SEP 2024
• EPA Facility Registry ServiceEXISTENCE
  Record 110070513588 · first seen FEB 2019 · last seen FEB 2019

IN BAY COUNTY6 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 3 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: SK SILTRON CSS LLC · OCT 2026

Street address

EPA: 5300 11 MILE RD · OCT 2026

City

EPA: AUBURN · OCT 2026

State

EPA: MI · OCT 2026

County (FIPS code)

EPA: 26017 · OCT 2026

Coordinates

EPA: 43.586113,-84.109322 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: LQG · OCT 2026