These electronics and semiconductor companies in the United Kingdom represent a mix of established large groups and mid-sized firms. They are engaged in diverse activities, from defense and aerospace with BAE Systems, to consumer electronics with Nothing, and specialized semiconductor design with Arm. Other companies like Edwards Vacuum provide critical solutions for various industries.
The list reveals a concentration of companies in the broader London area and in Cambridge, highlighting these locations as key hubs for the sector. Companies such as Halma plc and TT Electronics plc focus on safety, environmental monitoring, and specialized electronics for industrial applications, while Renishaw specializes in precision measurement and additive manufacturing.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
BAE Systemsbaesystems.com
The company provides advanced technology-led defense, aerospace, and security solutions, with a skilled workforce in over 40 countries, focusing on innovation and long-term commitment |
55,143 | |||
| 2 |
Nothingnothing.tech
London-based tech company building smartphones and audio equipment with iconic design and intuitive engineering as an alternative to established industry giants. |
29,964 | |||
| 3 | 11,505 | ||||
| 4 |
Edwards Vacuumedwardsvacuum.com
A global leader in vacuum and abatement solutions for a wide range of industries, enabling innovation and manufacturing processes worldwide |
4,477 | |||
| 5 | 3,875 | ||||
| 6 |
TT Electronics plcttelectronics.com
Engineering and manufacturing electronics for medical, automation, aerospace, and defense sectors to enhance safety, health, and sustainability globally. |
3,059 | |||
| 7 |
HBK - Hottinger Brüel & Kjærhbkworld.com
Provides comprehensive testing and data analysis solutions in sound, vibration, reliability, durability, propulsion efficiency, and weighing to accelerate product development. |
2,750 | |||
| 8 | 2,706 | ||||
| 9 |
Renishawrenishaw.com
Engineering and scientific technology company, specializing in precision measurement, healthcare solutions, and additive manufacturing for diverse global industries. |
2,613 | |||
| 10 |
Lucy Group Ltdlucygroup.com
International group providing sustainable infrastructure, smart energy distribution, advanced street lighting controls, and responsible property development for eco-friendly living. |
1,814 | |||
| 11 | 1,796 | ||||
| 12 |
Oxford Instruments plcoxinst.com
Design and manufacture advanced tools and systems for research and industry to fabricate, analyze, and manipulate matter at atomic level. |
1,773 | |||
| 13 |
Dialog Semiconductorrenesas.com
Provides standard and custom integrated circuits for IoT and Industrial IoT applications, focusing on power efficiency and performance across various markets. |
1,500 | |||
| 14 |
Sony Europesony.com
Leading entertainment, technology, and imaging solutions across Europe, focusing on AI, biotech, software, R&D, design, sales, and customer service. |
1,368 | |||
| 15 |
Oxford Nanopore Technologiesnanoporetech.com
Innovative biotech company developing portable DNA and RNA sequencing technology for real-time data delivery and scalable analysis in over 100 countries worldwide |
1,352 | |||
| 16 |
Smiths Interconnectsmithsinterconnect.com
Design and manufacture of high-reliability electronic components, microwave, optical, and RF products for aerospace, defense, medical, semiconductor, and industrial markets. |
1,090 | |||
| 17 |
Mitsubishi Electric Europe BVeurope.mitsubishielectric.com
Manufacture and sales of electrical and electronic products and systems for diverse applications, focusing on green technology contributions worldwide. |
1,037 | |||
| 18 |
Teledyne e2vteledyne-e2v.com
Develops advanced technology products, services, and solutions for diverse industries like medical, aerospace, and security, focusing on semiconductors, imaging, and radio frequency. |
1,030 | |||
| 19 |
Imagination Technologiesimaginationtech.com
Engineering high-performance, power-efficient chip designs for electronic products, with a global presence and talent pool solving complex technology challenges |
752 | |||
| 20 |
YAZAKI EUROPE LIMITEDyazaki-europe.com
The company specializes in automotive wiring harnesses and energy equipment, focusing on creating products for a safe and environmentally friendly society |
744 | |||
| 21 |
Samsung Electronics UKsamsung.com
A global leader in diverse businesses spanning technology, semiconductors, construction, fashion, finance, and more, dedicated to innovation and global citizenship |
737 | |||
| 22 |
Graphcoregraphcore.ai
A company specializing in AI technology with a unique processor designed to accelerate machine learning models and drive breakthroughs in general machine intelligence |
697 | |||
| 23 |
Teledyne Qioptiqteledyne-ade.com
Designs and manufactures photonic products and solutions for various industries, including medical, aerospace, and research, with expertise from multiple integrated companies |
660 | |||
| 24 |
Mini-Circuitsminicircuits.com
A global leader in RF, microwave, and millimeter wave technology, providing components for communication networks, national security systems, and cutting-edge technologies |
636 | |||
| 25 |
Teknikteknikuk.com
Contract Electronics Manufacturer specializing in Electrical and Electronic Sub-Assemblies, designing and building equipment to individual specifications with BS EN ISO9001 approval |
524 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Huawei Technologies Research & Development (UK) Ltd
The company is a global leader in technology innovation and research, with a focus on driving development in the global innovation value chain |
455 | |||
| 27 |
MSS International Groupmssinternational.com
Supply and manufacture of electrical transmission, distribution components, power storage units, and services supporting global energy transition and electrification. |
440 | |||
| 28 |
Cosworthcosworth.com
A global technology business redefining mobility solutions through propulsion, electronics, software for automotive, aerospace, marine sectors with focus on hybrid, EV, data connectivity, automation technology |
431 | |||
| 29 | 420 | ||||
| 30 |
G&H (Gooch & Housego)gandh.com
A world leader in optical design, testing, and manufacturing, specializing in providing optical systems and components for demanding applications |
411 | |||
| 31 |
Worldmarkccldesign.com
Global manufacturer of labels, components, branding solutions, and security applications for electronics, automotive, and industrial sectors, part of CCL Industries |
394 | |||
| 32 | 393 | ||||
| 33 |
Linksyslinksys.com
A leading provider of reliable and innovative wireless technologies for homes and businesses, delivering fast, secure, and user-friendly WiFi connections |
392 | |||
| 34 |
Astute Groupastutegroup.com
Authorized electronics distribution and supply-chain management with global sourcing, technical support, anti-counterfeit testing, and obsolescence management for aerospace and defense. |
386 | |||
| 35 |
TSLtslproducts.com
Specializing in innovative audio monitoring, control systems, and power management solutions for professionals in broadcast, media, aerospace, defense, and live events industries |
385 | |||
| 36 | 373 | ||||
| 37 |
Nidec Control Techniquescontroltechniques.com
Leading provider of variable speed drives & power conversion technology for commercial and industrial applications, enhancing productivity with innovative products for demanding applications |
365 | |||
| 38 |
Rebound Electronicsreboundeu.com
Hybrid Distribution company offering electronic components globally, combining franchised distribution with brokerage for best price, quality, and continuity of supply |
354 | |||
| 39 |
Cheltonchelton.com
Specializing in communication and navigation systems for aerospace and defense, offering antennas, anti-jam GPS, and electronic warfare solutions for diverse terrain |
353 | |||
| 40 |
Luceco Groupluceco.com
Manufacturing and distributing LED lighting products, EV chargers, wiring devices, circuit protection, portable power solutions, and audio-visual accessories for various global industries. |
351 | |||
| 41 |
Gooch & Housegogoochandhousego.com
World-leading manufacturer of precision optical components, light measurement instrumentation, and optical technologies with global sales, manufacturing, and prototyping capabilities |
333 | |||
| 42 |
Pragmatic Semiconductorpragmaticsemi.com
Development and production of flexible, sustainable semiconductors designed to accelerate innovation and positively impact people and the planet. |
327 | |||
| 43 |
acdcacdclighting.com
Specialist LED lighting designers and manufacturers transforming the industry with innovative systems, collaborating with top designers on prestigious global projects Visit website for inspiration |
320 | |||
| 44 |
PST is now DwyerOmegaprocesssensing.com
Provider of instruments, analyzers, and sensors for precision measurements in various industries, ensuring product quality, compliance, and cost savings through innovative sensing technologies |
313 | |||
| 45 |
Aion Siliconaionsilicon.com
Specializing in designing and manufacturing complex digital SoCs and ASICs, this global company offers innovative solutions with high quality and on-time delivery |
249 | |||
| 46 |
STI Limitedsti-limited.com
Specialist partner providing bespoke electronic design, manufacturing, R&D, supply-chain, and capital solutions for high-reliability industries globally. |
248 | |||
| 47 |
Acal BFiacalbfi.com
A leading provider of advanced solutions for electronic applications, offering a comprehensive range of specialized products, engineering expertise, and in-house capabilities across Europe |
241 | |||
| 48 |
QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.qualcomm.com
Provider of cutting-edge technology solutions as part of a global group, specializing in advancing innovations in the field of QUALCOMM technologies |
240 | |||
| 49 |
Filtronicfiltronic.com
Develops and manufactures high-performance RF, microwave, and mmWave technologies for telecommunications, critical communications, aerospace, defense, and space industries. |
236 | |||
| 50 |
Harwinharwin.com
This company designs and manufactures high-reliability interconnect devices and PCB hardware, serving demanding sectors like aerospace, defense, automotive, and medical with a global presence. |
228 | |||
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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 Nov 12, 2026.
More company lists in the United Kingdom
- The largest companies in the United Kingdom 36,548
- Multinational companies in the United Kingdom 7,458
- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
- Companies with in-house R&D in the United Kingdom 1,930
- IT Services and IT Consulting companies in the United Kingdom 1,722
- Retail companies in the United Kingdom 1,596
- IT services companies in the United Kingdom 1,583
- Hotel and hospitality groups in the United Kingdom 1,461
- Companies with a mobile app in the United Kingdom 1,411
- Consulting firms in the United Kingdom 1,298
- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
- Family-owned companies in the United Kingdom 1,224
- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
- Wellness and Fitness Services companies in the United Kingdom 1,151
- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060