Operating signal within 12 months from two or more independent sources.
What they make
Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing334511- maritime solutions
- defense
- acoustic monitoring
- signal processing
- vessel charter
- critical infrastructure
- undersea environment
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Kongsberg Digital Simulation INC | Groton | Commercial and Service Industry Machinery Manufacturing 333310 | LIKELY ACTIVE | 0.2 KM |
| 901 D, LLC | New London | All Other Miscellaneous Fabricated Metal Product Manufacturing 332999 | ACTIVE | 5.0 KM |
| Ox Owner, LLC. | Uncasville | Totalizing Fluid Meter and Counting Device Manufacturing 334514 | UNVERIFIED | 12.2 KM |
| Birk Manufacturing, INC. | East Lyme | Semiconductor and Related Device Manufacturing 334413 | ACTIVE | 17.5 KM |
| Fiberqa, LLC | Old Lyme | Other Measuring and Controlling Device Manufacturing 334519 | ACTIVE | 18.1 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
5 sources hold this plant, and 11 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 websiteOPERATINGfirst seen JUL 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord X7AWL5WPGHN5 · first seen JAN 2026 · last seen JAN 2026
- Connecticut Secretary of the State business registryOPERATINGRecord CT:001t000000Wo757AAB · first seen JAN 2026 · last seen JAN 2026
- OSHA injury and illness reportsOPERATINGRecord 1528808 · first seen DEC 2025 · last seen DEC 2025
- SBA Paycheck Protection Program loan recordsEXISTENCERecord CT|groton|120 leonard dr · first seen APR 2020 · last seen MAR 2021
IN SOUTHEASTERN CONNECTICUT COUNTY3 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 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
- SAM.gov: THAYERMAHAN, INC · JAN 2026
- Street address
- SAM.gov: 120B LEONARD DR · JAN 2026
- City
- SAM.gov: GROTON · JAN 2026
- State
- SAM.gov: CT · JAN 2026
- Coordinates
- Census geocoder: 41.337810050415,-72.047155312963 · JUL 2026
- Employees (band)
- OSHA: 100-499 · DEC 2025
- Website
- SAM.gov: www.thayermahan.com · JAN 2026
- CAGE code
- SAM.gov: 7LZ37 · JAN 2026
- PPP loan
- SBA PPP: PPP loan x1, approved 2020-04-14, 31 jobs reported · APR 2020
- SAM registration expires
- SAM.gov: 2027-01-08 · JAN 2026
- State business registrationSOURCES DISAGREE
- CT SOTS: THAYERMAHAN, INC., registered with the Connecticut Secretary of the State; Corporation formed in Delaware; registered 2017-01-25; active, annual report filed 2026-01-06 · JAN 2026
- TX Comptroller: THAYERMAHAN, INC., registered with the Texas Comptroller of Public Accounts; Corporation; active
- VA SCC: ThayerMahan, Inc., registered with the Virginia State Corporation Commission; Corporation formed in Delaware; registered 2023-10-12; active · OCT 2023