Allegro MicroSystems (Marlborough)

100 Crowley Drive, Marlborough, MA 01752

LIKELY ACTIVELAST SEEN IN FEDERAL DATA DEC 2025 · 2 SOURCES

Operating signal within 24 months, or from a single source.

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What they make

Semiconductor and Related Device Manufacturing334413

Where it is

42.36821, -71.57134 · CENSUS TIGER

COUNTY

Middlesex County

METRO AREA

Boston-Cambridge-Newton, MA-NH

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Other plants nearby

Facility	City	Industry	Status	Distance
Act Electronics INC	Hudson	Bare Printed Circuit Board Manufacturing 334412	UNVERIFIED	1.4 KM
Intel Fab 17 Semiconductor Manufacturing	Hudson	Semiconductor and Related Device Manufacturing 334413	UNVERIFIED	1.7 KM
Digital Equipment Company	Hudson	Semiconductor and Related Device Manufacturing 334413	UNVERIFIED	1.7 KM
Holographix LLC	Marlborough	Commercial and Service Industry Machinery Manufacturing 333310	ACTIVE	2.1 KM
Fourstar Connections INC	Hudson	Other Electronic Component Manufacturing 334419	UNVERIFIED	2.8 KM

Every listed plant in Middlesex County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 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 MA-EPICS, RCRAINFO.

OSHA injury and illness reportsOPERATING
Record 447598 · first seen DEC 2025 · last seen DEC 2025
EPA Facility Registry ServiceEXISTENCE
Record 110070440197 · first seen JAN 2019 · last seen JAN 2019

ALSO RECORDED ASALLEGRO MICROSYSTEMS LLC

IN MIDDLESEX COUNTY156 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 43 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: ALLEGRO MICROSYSTEMS LLC · JUL 2026
Street address: EPA: 100 CROWLEY DR · JUL 2026
City: EPA: MARLBOROUGH · JUL 2026
State: EPA: MA · JUL 2026
County (FIPS code): EPA: 25017 · SEP 2026
CoordinatesSOURCES DISAGREE: Census geocoder: 42.368210256333,-71.571342170129 · JUL 2026 · ON THIS PAGE; EPA: 42.3667,-71.57098 · JUL 2026
Employees (band): OSHA: 100-499 · DEC 2025

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