Facility	City	Industry	Status	Distance
Hottinger Bruel & Kjaer INC.	Marlborough	Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334515	ACTIVE	0.3 KM
HBK, Inc.	Marlborough	Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513	LIKELY ACTIVE	0.3 KM
Redwire Space Components, LLC	Marlborough	Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 336419	ACTIVE	0.3 KM
Marlborough MA	Marlborough	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	LIKELY ACTIVE	0.3 KM
Metamagnetics INC	Marlborough	Other Electronic Component Manufacturing 334419	ACTIVE	0.8 KM

Every listed plant in Middlesex County

Also at this address

No other federal record shares this street address.

Where this record comes from

4 sources hold this plant, and 13 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.

The company’s own websiteOPERATING
first seen JUL 2026 · last seen SEP 2026
SAM.gov entity registrationOPERATING
Record QEZ7G6S28R31 · first seen MAY 2026 · last seen MAY 2026
DOL Form 5500 retirement plan filingsOPERATING
Record 043145930|MA|01752|121 bartlett st · first seen DEC 2024 · last seen DEC 2024
SBA Paycheck Protection Program loan recordsEXISTENCE
Record MA|marlborough|121 bartlett st · first seen APR 2020 · last seen APR 2020

IN MIDDLESEX COUNTY277 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 91 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: JENTEK SENSORS, INC. · MAY 2026
Street address: SAM.gov: 121 BARTLETT ST · MAY 2026
City: SAM.gov: MARLBOROUGH · MAY 2026
State: SAM.gov: MA · MAY 2026
Coordinates: Census geocoder: 42.3223424199,-71.59518400811 · JUL 2026
Employees (band): DOL: 20-99 · DEC 2024
Website: SAM.gov: www.jenteksensors.com · MAY 2026
Year established: Company website: 1992 · AUG 2026
CAGE code: SAM.gov: 0VWV2 · MAY 2026
Retirement plan filing (Form 5500): DOL: 20 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024
PPP loan: SBA PPP: PPP loan x1, approved 2020-04-10, 18 jobs reported · APR 2020
SAM registration expires: SAM.gov: 2027-05-27 · MAY 2026
State business registration: Sunbiz: JENTEK SENSORS, INC., registered with the Florida Department of State, Division of Corporations; Corporation formed in Massachusetts; registered 2015-02-02; active, annual report filed 2026-03-17 · MAR 2026

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