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Amphenol TPC Wire & Cable logo

Amphenol TPC Wire & Cable

MACEDONIA, OH
501-1,000
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Founded in 1979 as a Detroit spin-off, Amphenol TPC Wire & Cable has grown into an Ohio-based industrial supplier with operations consolidated in a 120,000-square-foot Macedonia facility. The company is known for engineering cable solutions that endure the heat, chemicals and mechanical abuse found in manufacturing, automotive and other demanding industrial settings.

Wire and CablePortable CordPower Cables+56 more
Amphibian Aerospace Industries, Pty Ltd (AAI) logo

Amphibian Aerospace Industries, Pty Ltd (AAI)

MIDDLE RIVER, MD
11-50
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Australia’s Amphibian Aerospace Industries manufactures and develops certified amphibious aircraft, centering its work on the Albatross 2.0 for regional transport, government response and military missions. The company owns the FAA type certificates for the G-111 and HU-16 Albatross, whose record includes more than 40 years of service with the armed forces and coast guards of 22 nations. Based in Darwin, AAI is updating that established flying-boat platform with modern avionics, turboprop power and a research program spanning hybrid-electric propulsion and future zero-emission variants.

Albatross 2.0 Amphibious AircraftAlbatross 2.0M Military AircraftAlbatross G-111+40 more
Amplifier Solutions Corporation logo

Amplifier Solutions Corporation

TELFORD, PA
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Founded in 2004 by engineers from Phoenix Microwave (M/A-COM), Amplifier Solutions Corporation is a Telford, Pennsylvania manufacturer serving military and commercial system designers. Its engineering team develops custom RF and microwave amplification solutions, drawing on thick-film hybrid expertise and a facility equipped to support multiple shifts. ASC is SDB certified and ISO 9001:2008 registered.

RF AmplifiersMicrowave AmplifiersHybrid Amplifiers+34 more
AmpliTech Group, Inc logo

AmpliTech Group, Inc

HAUPPAUGE, NY
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Founded in 2002 by microwave engineer Fawad Maqbool, AmpliTech Group has spent more than two decades building a U.S.-based RF engineering business around difficult signal-performance problems. The Hauppauge company now operates as a vertically integrated signal technology group whose in-house chip design supports communications hardware used by defense contractors, satellite operators, telecommunications companies, and quantum-computing researchers. Its American-designed 64T64R Massive MIMO radio is a notable extension of that original amplifier expertise into Open RAN 5G.

Low Noise AmplifiersCryogenic AmplifiersMMIC Components+50 more
AMPRO logo

AMPRO

CLIFTON HEIGHTS, PA
51-200
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AMPRO is a Philadelphia-area apparel printer established in 1973, with its Clifton Heights facility producing custom printed and decorated garments. The company specializes in high-volume screen printing and reports printing more than 300 million T-shirts; it also provides embroidery and digital printing. AMPRO identifies itself as a certified Women's Business Enterprise through WBENC.

Custom-printed T-shirtsPrinted apparelSweatshirts and hoodies+52 more
AMPS Industrial Controls logo

AMPS Industrial Controls

HOLLAND, OH
2-10
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AMPS Industrial Controls is a family-owned and operated Ohio business that grew from Harold French’s 1992 company into a broader automation firm led in part by his son Matt. The company works directly with manufacturers and machine builders, bringing engineering and UL508A panel fabrication together in its Holland facility rather than passing projects between separate suppliers.

PLCsTouchscreen HMIsVariable Frequency Drives+57 more
AMPS Traction LLC logo

AMPS Traction LLC

WESTERVILLE, OH
2-10
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Established in 2018, Westerville-based AMPS Traction manufactures new and repowered all-battery locomotives for rail and heavy-industry customers. Its small engineering team develops FRA-compliant battery-electric solutions for applications ranging from industrial switching to scenic railways, including a patent-pending suspension system that cushions battery packs during coupling and switching. AMPS Traction’s G9 locomotive entered regular revenue service with Newburgh & South Shore Railroad in 2025.

All-Battery LocomotivesBattery-Electric LocomotivesLocomotive Conversions+26 more
Ampulis Inc logo

Ampulis Inc

BERWYN, PA
2-10
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Ampulis is a drug-delivery company built around a team with decades of experience developing medical devices and combination products. It works with pharmaceutical companies to adapt its AFS platform for sensitive medicines, helping move treatments from feasibility through clinical builds and production.

Ampoule-Filled SyringeAmpulis PristalAmpulis Flowen+31 more
Ampwave Defense logo

Ampwave Defense

LANCASTER, PA
51-200
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Ampwave Defense manufactures power tubes, helix-type traveling wave tubes, traveling wave tube amplifiers, microwave power modules, and related power-tube circuitry. Its products serve electronic warfare, radar, communications, aerospace, defense, SatCom, research, and test and measurement applications.

Power TubesTraveling Wave TubesTraveling Wave Tube Amplifiers+32 more
AmpX Technologies, Inc logo

AmpX Technologies, Inc

COLLEGE PARK, MD
2-10
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Founded by power-electronics scholar Alireza Khaligh, Ph.D., AmpX Technologies designs and builds next-generation power electronics for energy conversion, with a focus on electrification from electric vehicles to homes and infrastructure. The Rockville company combines proprietary optimization software with custom hardware, including an electrically integrated onboard charger and DC/DC converter that has been tested on a customer vehicle. Its technical leadership also includes co-founder and engineering vice president Zeyu Zhang, whose work includes MHz gallium-nitride EV charging systems.

Power ElectronicsEV Onboard ChargersDC/DC Converters+23 more
Amramp logo

Amramp

CHAMBERSBURG, PA
51-200
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Amramp grew from a 1970 metal-products shop into a family-owned accessibility manufacturer and installer, best known for its patented steel modular wheelchair ramps. Founded as the Amramp brand in 1998, the company now supports local teams across the United States and Canada with ramps, lifts and other mobility solutions for homes, businesses and temporary events. Julian Gordon’s son, Justin, joined as an installer and became CEO in 2020, keeping the business in the family while AmrampCARES extends its mission through donated ramps for people in need.

Accessibility SolutionsResidential RampsCommercial Ramps+41 more
AMS Filling Systems logo

AMS Filling Systems

MORGANTOWN, PA
11-50
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Since 1986, AMS Filling Systems has built its identity around solving difficult filling problems with customer-specific engineering rather than one-size-fits-all equipment. The company works from a 75,000-square-foot facility in Morgantown, Pennsylvania, where its team tests products and supports customers throughout a project and after installation.

Auger FillersCup FillersNet Weight Fillers+25 more
AMS Group Inc logo

AMS Group Inc

KEARNEYSVILLE, WV
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Founded in 1983 by retired Royal Navy Commander Jack Gale, AMS Group is a U.S.-owned and operated defense company with more than four decades of experience supporting the U.S. Department of Defense and Homeland Security. Its work now reaches customers on six continents and 60 countries, with a particular focus on sustaining critical military platforms and helping allied nations meet complex security needs.

Aerospace ComponentsEngineered Aerospace SystemsDefense Systems+40 more
AMS Group Inc logo

AMS Group Inc

STEVENSVILLE, MD
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Since its founding in 1983 by retired Royal Navy commander Jack Gale, AMS Group has grown from a sales consultancy for British naval equipment into a U.S.-owned and operated defense-support company. It works with the U.S. Department of Defense, Homeland Security and allied nations to keep critical military platforms ready, with support reaching six continents and 60 countries. Its history is especially rooted in the long-term sustainment of complex and legacy systems.

Engineered Aerospace SystemsDefense SystemsDefense Components+43 more
AMS Seat Structures LLC logo

AMS Seat Structures LLC

FORT RECOVERY, OH
201-500
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Born from JR Manufacturing’s 1998 start making citronella buckets, AMS Seat Structures now manufactures automotive headrests, seat frames, and other formed wire and tube components. The company employs approximately 500 people across Ohio, Tennessee, and Mexico, with in-house prototyping and tooling supporting parts that are difficult to produce elsewhere. After a 2023 fire destroyed its more than 75,000-square-foot corporate facility, the team restarted production without disrupting customers and reemerged as AMS Seat Structures following Angstrom’s 2025 acquisition.

Automotive HeadrestsSeat Frames and StructuresFormed Wires+35 more
AMS-JRC logo

AMS-JRC

BUTLER, PA
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AMS-JRC is a Butler, Pennsylvania electronic contract manufacturer incorporated in 1989, producing electronic assemblies for OEMs and other customers. It specializes in prototype through small- and medium-volume work, including printed circuit board assemblies, and serves customers across the United States.

Printed Circuit Board AssembliesCablesWire Harnesses+55 more
AO

ams-OSRAM AG

WARREN, PA
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ams-OSRAM AG is a global manufacturer of light and sensor technologies, with more than 110 years of design and manufacturing experience and around 18,500 employees worldwide. Its portfolio includes semiconductor emitters and sensors, and it also operates a full-service CMOS foundry drawing on four decades of expertise. The company identifies its focus areas as sensing, illumination, and visualization.

LEDsWhite LEDsColor LEDs+68 more
Amsted Graphite Materials logo

Amsted Graphite Materials

CLARKSBURG, WV
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Operating in Clarksburg, West Virginia, since 1906, Amsted Graphite Materials manufactures synthetic carbon and graphite materials for demanding industrial applications. Its West Virginia facility supplies customers in more than 35 countries, while its GRAFSTAR® line and specialized material-science expertise support uses ranging from nuclear energy to aerospace and defense. The company is part of Amsted Industries and is the largest U.S.-owned synthetic graphite producer.

GRAFSTAR Advanced GraphiteExtruded Carbon and Graphite MaterialsMolded Carbon and Graphite Materials+40 more
Amsted Rail logo

Amsted Rail

CAMP HILL, PA
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Amsted Rail manufactures railcar undercarriage and end-of-car components and systems, serving freight and transit rail markets. Its roots in the Griffin Wheel Company date to 1877, and the company says its facilities span more than 40 locations across six continents. It is part of privately held, employee-owned Amsted Industries.

Bogie SystemsTransit BogiesFreight Car Components+49 more
Amstergen Life Sciences LLC logo

Amstergen Life Sciences LLC

WARMINSTER, PA
11-50
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Amstergen Life Sciences LLC is a Pennsylvania-based pharmaceutical company specializing in sterile oncology and non-oncology products, including injectables and ophthalmics. The company focuses on developing, manufacturing, and marketing generic pharmaceutical products and offers contract manufacturing services.

Sterile InjectablesOphthalmicsInjectables Non-Oncology+13 more
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