| # | Company | Employees |
|---|---|---|
| 1 |
Corning Incorporatedcorning.com
Development of advanced glass, ceramics, and optical products for communications, electronics, automotive, life sciences, and display technologies. |
22,260 |
| 2 |
GlobalFoundriesgf.com
Semiconductor manufacturer offering innovative process technology solutions, design, development, and fabrication services with global presence and diverse workforce |
13,861 |
| 3 |
FUJIFILM Americasfujifilm.com
A diverse group of affiliate companies focused on innovation in industries such as medical, electronics, chemicals, and photography to enhance global lives |
4,327 |
| 4 |
Levitonleviton.com
A global leader in electrical devices, lighting solutions, networking, security, home automation, and data infrastructure products for residential, commercial, and industrial needs |
2,593 |
| 5 | 1,430 | |
| 6 |
Spellman High Voltage Electronics Corporationspellmanhv.com
Manufacturer of DC high voltage power supplies, X-ray generators, and Monoblock X-ray sources for medical, scientific, security, and industrial applications globally. |
921 |
| 7 |
PCB Piezotronics, Inc.pcb.com
Manufactures vibration, pressure, force, strain, shock, and acoustic sensors for testing, measurement, monitoring, and control across multiple industries globally. |
845 |
| 8 |
JMA Wirelessjmawireless.com
A global tech company specializing in cutting-edge wireless technology solutions, including 5G, private networks, antennas, and indoor capabilities, manufactured in the US |
756 |
| 9 |
Telephonicsttm.com
Global manufacturer of technology solutions, including RF components, PCBs, and engineering systems, focused on shortening time-to-market for customers worldwide |
712 |
| 10 | 569 | |
| 11 |
Teledyne LeCroyteledynelecroy.com
Manufacturer of advanced oscilloscopes, protocol analyzers, and other test instruments that verify performance, validate compliance, and debug complex electronic systems quickly and thoroughly. |
567 |
| 12 |
IEC Electronics Corp.creationtech.com
Provider of electronic manufacturing services for advanced technology companies in medical, industrial, aerospace, and defense sectors Specializes in full system assemblies and testing |
538 |
| 13 |
Curtis Instrumentscurtisinstruments.com
This company specializes in developing innovative motor control, battery management, and vehicle instrumentation for electric vehicles, with a global presence and commitment to cutting-edge technology |
535 |
| 14 |
Gao Tekgaotek.com
A global supplier of advanced electronics and network products, including fiber optics, test instruments, computing devices, environmental equipment, and RFID technology Operating in USA and Canada |
505 |
| 15 |
G. W. Liskgwlisk.com
Global leader in designing and manufacturing engineered solutions such as solenoids, sensors, motors, actuators, and flame arrestors for diverse markets worldwide |
469 |
| 16 |
MicroTechnologiesmic-tec.com
Precision manufacturing company offering design, manufacturing, assembly, and inventory management solutions for global OEMs, with focus on innovation, quality, and scale |
463 |
| 17 |
Persistent Systems, LLCpersistentsystems.com
A global communications technology company developing secure Mobile Ad hoc Networking systems for various industries, with proven solutions for challenging environments |
453 |
| 18 |
Kauffman Engineeringkewire.com
Worldwide supplier electrical wire harnesses, lead wires, cable assemblies, molded plugs, thermoform plastics, populated circuit boards. Specializes in high mix products with low to medium volumes. |
373 |
| 19 | 367 | |
| 20 |
NY Createsny-creates.org
A leading R&D innovation hub focused on semiconductor technology, facilitating partnerships and commercialization to drive high-tech industries and job opportunities |
314 |
| 21 |
Knowles Precision Devicesknowlescapacitors.com
A global leader in high-performance microelectronics components, part of a larger corporation, known for precision devices |
271 |
| 22 |
Electro Industries / GaugeTechelectroind.com
The company develops and manufactures energy management and power monitoring solutions, including cloud-based platforms and accurate energy meters, improving energy efficiency and power reliability. |
244 |
| 23 |
Rochester Precision Opticsrpoptics.com
A world-class manufacturer of precision optical product solutions in the Greater Rochester area, offering design, production, and assembly for Defense and Commercial Industries |
179 |
| 24 |
RiverSide Integrated Solutionsriversideintegratedsolutions.com
Provides full-service contract manufacturing for electronic, electromechanical, and box build assemblies, offering diverse capabilities, extensive experience, and exceptional performance, while being flexible and responsive to customer needs. |
165 |
| 25 |
Ansen Corporationansencorp.com
An electronics manufacturing services provider with over 35 years of experience offering PCB assembly, mechanical assembly, prototyping, testing, distribution, and repair services in various industries |
132 |
| 26 |
Syntec Opticssyntecoptics.com
An American optics and photonics manufacturing company in Rochester, NY, specializing in custom optical solutions for defense, medical, and virtual reality applications |
101 |
| 27 |
Ceres Technologiescerestechnologies.com
Global provider of state-of-the-art process equipment for semiconductor and photovoltaic industries, offering engineering services, complex tool builds, and branded products |
90 |
| 28 |
NIC Components Corp.niccomp.com
A leading supplier of surface mount and leaded electronic components, offering over 180 product series to OEMs in over fifty countries |
68 |
| 29 |
Sydor Optics, Inc.sydor.com
Global leader in precision processing and delivery of high quality flat optical components for various industries, offering polishing, machining, cleaning and sub-assembly services ISO 9001:2015 Certified |
54 |
| 30 |
Resonacshowadenko.us
Cutting-edge functional materials technology company committed to co-creating solutions for today's challenges and driving societal change through chemistry |
47 |
| 31 |
Applied Image Incappliedimage.com
A global leader in precision-imaged optical components for various industries, specializing in custom designs with NIST-traceable standards and high customer satisfaction |
33 |
| 32 |
American Aerospace Controlsa-a-c.com
A premier manufacturer of AC & DC transducers for high reliability defense, aerospace, and space flight applications, meeting strict standards for quality and customization |
21 |
| 33 |
Trackimotrackimo.com
An IoT solution provider offering GPS-GSM devices for tracking and monitoring valuable items, with a focus on customizable technology for businesses worldwide |
16 |
| 34 |
Lab X Technologieslabxtechnologies.com
An engineering design firm based in Rochester, NY, specializing in digital audio transport, network connectivity, AVB networking, and custom solutions for manufacturers |
15 |
| 35 |
Derf Electronicsderf.com
An electrical/electronic manufacturing company located in Poughkeepsie, NY, specializing in the production of electronic components and devices |
10 |
| 36 |
Acrolite, Inc.acrolite.net
Specializing in fiber optic lighting and sensing systems, the company serves medical and industrial OEM manufacturers with custom solutions and high transmission glass fiber products |
9 |
| 37 |
Supply Concepts Inc.supplyww.com
Manufacturer providing design, tooling, and assembly services for custom metal products, plastic injections, wire harnesses, electrical components, and more to OEMs and contract manufacturers worldwide |
4 |
| 38 |
Della Systems Incdellasystems.com
Comprehensive turnkey electronic manufacturing services, including design, prototyping, production, and testing, streamlining project management and ensuring quality products |
4 |
| 39 |
Exertherm - (USA)exertherm.com
Global provider of Thermal & Power/Energy Monitoring solutions for Mission Critical Monitoring, with operations in USA, UK, Europe and EMEA |
2 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
More company lists in New York State
- The largest companies in New York State 10,485
- Financial services firms in New York State 1,058
- SaaS companies in New York State 942
- Financial Services companies in New York State 921
- Venture capital and private equity firms in New York State 678
- Software Development companies in New York State 595
- Real Estate companies in New York State 590
- IT Services and IT Consulting companies in New York State 451
- Retail chains in New York State 412
- Advertising Services companies in New York State 412
- Investment Management companies in New York State 400
- Hospitals and Health Care companies in New York State 392
- Venture Capital and Private Equity Principals companies in New York State 365
- Education providers in New York State 317
- AI companies in New York State 306
- Retail Apparel and Fashion companies in New York State 304
- Non-profit Organizations companies in New York State 299
- Critical infrastructure operators in New York State 278
- Higher Education companies in New York State 275
- IT services companies in New York State 275
- AI-native companies in New York State 266
- Technology, Information and Internet companies in New York State 266
- Healthcare providers in New York State 261
- Insurance companies in New York State 232
The same list elsewhere in United States
- Electronics and semiconductor companies in the United States 781
- Electronics and semiconductor companies in California 218
- Electronics and semiconductor companies in Texas 51
- Electronics and semiconductor companies in Illinois 34
- Electronics and semiconductor companies in Massachusetts 34
- Electronics and semiconductor companies in Pennsylvania 31
- Electronics and semiconductor companies in New Jersey 30
- Electronics and semiconductor companies in Florida 26
- Electronics and semiconductor companies in San Jose 46
- Electronics and semiconductor companies in Santa Clara 26