4m Sigma Corporation
2643 28th Ave W, Seattle, WA 98199
Operating signal within 24 months, or from a single source.
What they make
Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals334515- aerospace manufacturing
- backshop test equipment
- operational support equipment
- airframe cable assemblies
- safety training
- shorting adapters
- commercial aviation
- defense
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Rugged Controls LLC | Seattle | Other Measuring and Controlling Device Manufacturing 334519 | ACTIVE | 1.6 KM |
| Thermetrics, LLC | Seattle | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513 | ACTIVE | 1.6 KM |
| 4m Sigma Corporation | Seattle | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334515 | LIKELY ACTIVE | 1.5 KM |
| Fialab Instruments, INC. | Seattle | Analytical Laboratory Instrument Manufacturing 334516 | ACTIVE | 1.7 KM |
| Brooks Rand, INC. | Seattle | Analytical Laboratory Instrument Manufacturing 334516 | LIKELY ACTIVE | 1.4 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
1 source holds this plant, and 8 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.
- SAM.gov entity registrationOPERATINGRecord T955WM3QK355 · first seen OCT 2026 · last seen OCT 2026
IN KING COUNTY100 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 29 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
- SAM.gov: 4M SIGMA CORPORATION · OCT 2026
- Street address
- SAM.gov: 2643 28TH AVE W · OCT 2026
- City
- SAM.gov: SEATTLE · OCT 2026
- State
- SAM.gov: WA · OCT 2026
- Coordinates
- Census geocoder: 47.643718963015,-122.393033876561 · NOV 2026
- Website
- SAM.gov: http://www.4MSigma.com · OCT 2026
- CAGE code
- SAM.gov: 0BC31 · OCT 2026
- SAM registration expires
- SAM.gov: 2027-10-01 · OCT 2026