Best Semiconductors Companies in Connecticut, United States
The 64 best Semiconductors companies in Connecticut, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Amphenol.
Our analysis of 69 Semiconductors companies
$22.3b in tracked funding; 88% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Semiconductors companies in Connecticut
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Amphenol Manufacturer and supplier of electrical and electronics components | $570M | 91 mo ago | Public | R Norwitt CEO | 1932 | SalesforceVimeoBootstrap+17 | 1,667 patents High‑density, high‑speed electrical connectors and interposers for advanced electronic assemblies. | — |
| 2 | Quantum Circuits Develops quantum computers using superconducting quantum circuits | $105M | 22 mo ago | Acquired | Michel Devoret Co-Founder & CSO | 2015 | WordPressMySQLPHP+19 | 10 patents Quantum photonic entangling gates, cryogenic‑room‑temp interfaces, and qubit resistive attenuators. | — |
| 3 | Saphlux Developer of III-V Group-based semiconductor materials 40Talent top 15%Product top 25%Funding top 30%Moat top 32% All 9 signals ▾Talenttop 15% Producttop 25% Fundingtop 30% Moattop 32% Patentstop 38% Innovationtop 40% Techbottom 44% Globalbottom 40% Marketbottom 20% Talent: Analyst team rating 5/5 Product: 6 distinct product lines · Company stage: Series C rank vs industry peers · Fliar Intelligence Index 40/100 | $22M | 2 mo ago | Series C | — | 2014 | Cart FunctionalitySquarespace CommerceSquarespace+13 | 32 patents Patents concentrated in electrical & electronics | 1 partnership |
| 4 | Magik Eye Provider of 3D image sensors for VR applications | $6M | 90 mo ago | Series A | Takeo Miyazawa Founder & CEO | 2014 | — | 156 patents Patents concentrated in computing, sensing & instrumentation | — |
| 5 | TranSwitch® IC & IP solutions for High Definition | $2M | 154 mo ago | Early Stage | — | 1988 | LiteSpeedAMPGoogle Font API+2 | 129 patents High-speed PAM-N serial interface PHY, equalization, and clock/data recovery circuits. | — |
| 6 | Microphase Manufacturer of radio frequency ICs | $2M | 120 mo ago | Early Stage | Necdet Ergul Founder & President | 1955 | WordPressMySQLPHP+18 | — | — |
| 7 | AGSS Provider of electronics equipment | — | 204 mo ago | Series A | Albert Vasquez Managing Director | 2003 | — | — | — |
| 8 | AB Electronics Contract manufacturing company that offers a full range of electronics manufacturing services | — | — | Unfunded | — | 1994 | WordPressMySQLPHP+16 | 810 patents Single-pair power/data transmission, voice communication systems, and shot peening monitoring technologies. | — |
Top 7 Semiconductors companies in Connecticut
#1
Series C · New Haven, Connecticut · founded 2014 · 3 employees$22Mraised▾
Developer of III-V Group-based semiconductor materials. It provides users with III-V Group-based semiconductor materials for fabricating semiconductor wafers or integrated circuits with a new base material which finds applications in improving LED technology and LED performance. It also provides a chip out which could reduce the cost of manufacturing LED-based lighting by 10 times.
- Apr 2026Series C$43.5M
- Dec 2022Series B$15.8M
- Mar 2017Series A$5M
- Jul 2015Seed$200K
#2
Acquired · New Haven, Connecticut · founded 2015 · 20 employees$104.6Mraised▾
Quantum Circuits Inc. is a Yale University spin-off that designs superconducting quantum computing systems. It intends to develop modular quantum computers that can be reconfigured multiple times to function as computing systems for drug discovery and genetics, financial applications, industrial design functions, etc. As of November 2017, its products include hardware such as quantum-limited parametric amplifiers and other hardware devices. It intends to use its Series A funding round to build larger software teams as well.
- Aug 2024Series B$60M
- Feb 2024Series B$26.6M
- Nov 2017Series A$18M
#3
Public · Wallingford, Connecticut · founded 1932 · 70000 employees$570.4Mraised▾
Amphenol is a manufacturer and supplier of electrical and electronics components. Manufacture radsok connectors, cable assemblies, electrical, electronic & fiber optic connectors, coaxial & flat-ribbon cable and interconnect systems. for automotive industries. Also manufacture components for aerospace & military electronics, rail, and other transportation and industrial markets. In 2022, the company recorded annual revenues of $12.62B and a net profit of $1.9B.
- Nov 2018Conventional Debt$570.4M
#4
Series A · Stamford, Connecticut · founded 2014 · 17 employees$5.6Mraised▾
Provider of 3D image sensors for VR applications. It develops 3D sensors to recover 3D from a single conventional camera with a small size factor, low power, low computation and low cost. It develops solutions for drones for obstacle avoidance and terrain mapping, endoscopes for medical and surgical applications, robotics, AR/VR, facial recognition, and smartphones for 3D photography and video recording.
- Dec 2018Series A$5.1M
- Jul 2016Seed$500K
#5
Early Stage · Shelton, Connecticut · founded 1955 · 35 employees$2.3Mraised▾
Manufacturer of radio frequency ICs. It designs and develops standard and customized RF, microwave, and millimeter-wave components, devices, subsystems, and integrated modules. Their key technology competencies include detector technology, filter solutions, component technology, amplifier solutions, multifunction assemblies, and integrated subsystems, and CATV technology. It has applications in commercial wireless infrastructure, defense, aerospace, satellite, wireless multimedia and consumer electronics, public safety, and global security markets.
- Jun 2016Unattributed$250K
- Apr 2016Unattributed$1.1M
- Feb 2014Unattributed$945K
#6
Early Stage · Shelton, Connecticut · founded 1988 · 117 employees$2.5Mraised▾
TranSwitch Corporation designs, develops, markets, and supports integrated digital and mixed-signal semiconductor devices for the telecommunications and data communications markets worldwide. It serves public network systems OEMs, WAN and LAN equipment OEMs, Internet-oriented OEMs, and communications test and performance measurement equipment OEMs, as well as government, universities, and private laboratories. TranSwitch all IP assets were brought by Cadence.
- Aug 2013Unattributed$2.5M
#7
Series A · Stamford, Connecticut · founded 2003 · 8 employees—raised▾
Provider of second-hand electronics manufacturing equipment and services based in Connecticut. The company supplies and resells used electronics manufacturing equipment like integrated circuit test/assembly, and printed circuit board assembly equipment acquired from leading electronics manufacturers.
- 2009Series A—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Semiconductors coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Semiconductors in Connecticut is moving
A read on the academic research around Semiconductors in Connecticut — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 51 papers.
- University of Connecticut49
- Central Connecticut State University1
- Southern Connecticut State University1
- Integrated circuit14
- Chip11
- Embedded system9
- Overhead (engineering)7
- Reliability (semiconductor)6
- Integrated circuit5
- Embedded system5
- Reliability (semiconductor)3
- Hardware Trojan3
- Electronic circuit3
- Integrated circuit2
- Trojan2
- Hardware Trojan2
- Transistor1
- Electronic engineering1
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.