Parkwalk Advisors

Parkwalk Advisors is a London-based venture capital firm that focuses on UK technology companies with IP backing, primarily those spun out from UK universities. The firm invests across seed to growth stages, including late-stage rounds, and is stage-agnostic, aiming to support unlisted companies with freedom to operate. It concentrates on companies originating from university research, especially in Cambridge and across the UK, and targets sectors such as healthcare, energy, materials, technology, artificial intelligence, big data, life sciences, cleantech, medtech, quantum computing, and the apps ecosystem. Typical investments range from about £0.3 million to £10 million, with capital structures kept in a single share class, and the firm may provide equity or debt financings. Investments are generally planned over a three- to eight-year horizon.

Ian Broadhurst

Investor

Neil Cameron

Investor

Enrico D'Angelo

CFO

Cassie Doherty

Investor

Martin Glen

Investor

Alastair Kilgour

Investor

John Pearson

Investor

Kathy Samii

COO

Emilie Syed

Senior Associate

Alun Williams

Investor

Moray Wright

Co-Founder and CEO

Karolina Zapadka

Investor

Past deals in Semiconductor

Cambridge GaN Devices

Series C in 2025
Cambridge GaN Devices develops gallium nitride based power devices and transistors designed to improve energy efficiency in power electronics. The company designs, creates, and commercializes GaN-based semiconductors that achieve faster switching, lower energy losses, and smaller form factors compared with traditional silicon devices while delivering higher power density. Its products are intended for applications in sectors such as renewable energy, electric vehicles, and consumer electronics, enabling compact and more efficient power conversion and energy management. The company collaborates with industry partners to drive innovation and accelerate adoption of GaN technology in the power semiconductor market.

Nu Quantum

Seed Round in 2023
Nu Quantum is a Cambridge-based quantum technology company developing the networking infrastructure required to scale quantum computers. It produces quantum photonics hardware, including photon sources and detectors, and nano-engineered materials for quantum light generation and ultra-sensitive detection. The firm is building a complete hardware system to create entangled qubit networks by interconnecting computing cores into large distributed clusters, featuring a high-speed network interface, photonic switching fabric, and control systems. This entangled fabric enables secure exchange of cryptographic keys and underpins quantum encryption links for sensitive communications. Partnerships with leading quantum companies, governments, and research groups support the path to market.

AccelerComm

Series B in 2023
AccelerComm is a semiconductor IP-core company that provides forward error correction and channel coding solutions for wireless communications. It develops hardware-friendly encoders and decoders, including 3GPP-compliant encoding/decoding chains, turbo decoders, LDPC chains, and polar encoder/decoder facilities, to accelerate next-generation wireless systems and overcome bottlenecks in error correction decoding caused by noise and interference. The company focuses on patent-pending channel coding technology that enhances data throughput and efficiency for 3GPP-based networks and related applications, including base stations and mobile devices. Headquartered in Southampton, United Kingdom, AccelerComm aims to enable cost-effective, high-performance digital communications across multiple standards.

Quantum Motion

Series B in 2023
Quantum Motion Technologies is developing a universal quantum computer using Silicon-based CMOS processes. Its focus lies in creating scalable arrays of qubits, aiming to develop quantum computing architectures compatible with existing silicon processing methods.

Cambridge GaN Devices

Series B in 2022
Cambridge GaN Devices develops gallium nitride based power devices and transistors designed to improve energy efficiency in power electronics. The company designs, creates, and commercializes GaN-based semiconductors that achieve faster switching, lower energy losses, and smaller form factors compared with traditional silicon devices while delivering higher power density. Its products are intended for applications in sectors such as renewable energy, electric vehicles, and consumer electronics, enabling compact and more efficient power conversion and energy management. The company collaborates with industry partners to drive innovation and accelerate adoption of GaN technology in the power semiconductor market.

Paragraf

Series A in 2022
Paragraf is a UK-based company specializing in graphene technology. Established in 2015, it focuses on developing high-purity graphene products for commercial applications, particularly in electronics. The company produces graphene electronic devices and sensors using contamination-free technology.

Paragraf

Series B in 2022
Paragraf is a UK-based company specializing in graphene technology. Established in 2015, it focuses on developing high-purity graphene products for commercial applications, particularly in electronics. The company produces graphene electronic devices and sensors using contamination-free technology.

Helio Display Materials

Seed Round in 2021
Helio Display Materials is a developer of innovative perovskite-based materials aimed at enhancing display technology. The company focuses on creating materials that enable brighter and more colorful displays while significantly reducing power consumption. By leveraging metal halide perovskites, which can be synthesized using low-temperature processes and earth-abundant precursor materials, Helio aims to produce vibrant and efficient light-emitting technologies for televisions and displays. The company emphasizes collaboration with scientific and industry experts to expedite research and development, ensuring a strong scientific foundation for its intellectual property. Helio's mission is to improve display performance and efficiency, ultimately providing a superior visual experience.

Porotech

Seed Round in 2021
Porotech is a Cambridge University spin-out focused on developing wide-bandgap compound gallium nitride (GaN) semiconductors. It aims to revolutionize the electronics industry by applying advanced material technologies to unlock GaN's full potential, enabling more efficient light-emitting diodes and other electronic devices.

Cambridge GaN Devices

Series A in 2021
Cambridge GaN Devices develops gallium nitride based power devices and transistors designed to improve energy efficiency in power electronics. The company designs, creates, and commercializes GaN-based semiconductors that achieve faster switching, lower energy losses, and smaller form factors compared with traditional silicon devices while delivering higher power density. Its products are intended for applications in sectors such as renewable energy, electric vehicles, and consumer electronics, enabling compact and more efficient power conversion and energy management. The company collaborates with industry partners to drive innovation and accelerate adoption of GaN technology in the power semiconductor market.

Nu Quantum

Seed Round in 2020
Nu Quantum is a Cambridge-based quantum technology company developing the networking infrastructure required to scale quantum computers. It produces quantum photonics hardware, including photon sources and detectors, and nano-engineered materials for quantum light generation and ultra-sensitive detection. The firm is building a complete hardware system to create entangled qubit networks by interconnecting computing cores into large distributed clusters, featuring a high-speed network interface, photonic switching fabric, and control systems. This entangled fabric enables secure exchange of cryptographic keys and underpins quantum encryption links for sensitive communications. Partnerships with leading quantum companies, governments, and research groups support the path to market.

Flusso

Series A in 2020
Flusso Ltd, established in 2016 and headquartered in Cambridge, United Kingdom, specializes in the development and manufacturing of sensor solutions tailored to various industries. The company produces mass flow and air velocity sensors, leveraging proprietary technology to meet specific application needs.

Quantum Motion

Series A in 2020
Quantum Motion Technologies is developing a universal quantum computer using Silicon-based CMOS processes. Its focus lies in creating scalable arrays of qubits, aiming to develop quantum computing architectures compatible with existing silicon processing methods.

Sorex Sensors

Series A in 2020
Sorex Sensors designs and manufactures high-sensitivity micro-electro-mechanical system (MEMS) mass sensors based on film bulk acoustic resonator (FBAR) technology. Their products, fabricated on silicon wafers, measure mass down to the femtogram range and temperature with a resolution of 0.2°C, making them suitable for thin film metrology, particulate monitoring, and gas detection applications.

Paragraf

Series A in 2019
Paragraf is a UK-based company specializing in graphene technology. Established in 2015, it focuses on developing high-purity graphene products for commercial applications, particularly in electronics. The company produces graphene electronic devices and sensors using contamination-free technology.

Porotech

Seed Round in 2019
Porotech is a Cambridge University spin-out focused on developing wide-bandgap compound gallium nitride (GaN) semiconductors. It aims to revolutionize the electronics industry by applying advanced material technologies to unlock GaN's full potential, enabling more efficient light-emitting diodes and other electronic devices.

Paragraf

Series A in 2019
Paragraf is a UK-based company specializing in graphene technology. Established in 2015, it focuses on developing high-purity graphene products for commercial applications, particularly in electronics. The company produces graphene electronic devices and sensors using contamination-free technology.

Cambridge GaN Devices

Seed Round in 2019
Cambridge GaN Devices develops gallium nitride based power devices and transistors designed to improve energy efficiency in power electronics. The company designs, creates, and commercializes GaN-based semiconductors that achieve faster switching, lower energy losses, and smaller form factors compared with traditional silicon devices while delivering higher power density. Its products are intended for applications in sectors such as renewable energy, electric vehicles, and consumer electronics, enabling compact and more efficient power conversion and energy management. The company collaborates with industry partners to drive innovation and accelerate adoption of GaN technology in the power semiconductor market.

Flusso

Venture Round in 2019
Flusso Ltd, established in 2016 and headquartered in Cambridge, United Kingdom, specializes in the development and manufacturing of sensor solutions tailored to various industries. The company produces mass flow and air velocity sensors, leveraging proprietary technology to meet specific application needs.

Silicon Microgravity

Venture Round in 2018
Silicon Microgravity is a Cambridge, United Kingdom based sensor technology company that develops microelectromechanical systems for oil and gas reservoir surveillance and other applications. Its gravity sensors deliver high-sensitivity gravity data and ultra-low-frequency seismic data from boreholes, enabling precise density measurements deep in reservoirs and real-time reservoir management. The technology originated as a Cambridge University spin-out, developed with support from BP and Innovate UK, and has broader uses in navigation and stabilization of intelligent systems across commercial, industrial, and military sectors. The company aims to improve efficiency, reduce costs, and support safety and environmental goals in hydrocarbon production.

Paragraf

Seed Round in 2018
Paragraf is a UK-based company specializing in graphene technology. Established in 2015, it focuses on developing high-purity graphene products for commercial applications, particularly in electronics. The company produces graphene electronic devices and sensors using contamination-free technology.

Quantum Motion

Seed Round in 2017
Quantum Motion Technologies is developing a universal quantum computer using Silicon-based CMOS processes. Its focus lies in creating scalable arrays of qubits, aiming to develop quantum computing architectures compatible with existing silicon processing methods.

NuNano

Series A in 2017
NuNano is a UK-based company founded in 2011 that specializes in designing and manufacturing probes for atomic force microscopy (AFM) and cantilever-based sensor devices. Established by Dr. James Vicary and Professors Heinrich Hoerber and Mervyn Miles, NuNano aims to innovate the AFM industry, which had seen little change over two decades, by introducing new manufacturing methods and providing superior customer service. The company's proprietary microfabrication processes allow it to produce AFM probes with the tightest dimensional tolerances available, facilitating precise investigations of nano-scale material properties. These probes are utilized across various applications, including routine quality control in the semiconductor industry and research in molecular biology. NuNano is committed to ensuring an optimal experience for AFM users, from initial website interaction to post-experiment probe storage.

Microsaic Systems

Post in 2016
Microsaic Systems develops and markets miniaturised mass spectrometry instruments based on micro-electro-mechanical systems technology. It offers the MiD platform, including 4500 MiD for pharmaceutical and biopharmaceutical applications; MiDas Automated Sampling interface for automated sampling, dilution, and injection for direct MS analysis; MiD Protein ID, a miniaturised mass spectrometer; and Masscape, an open-access software for sample method design and data analysis. Its products support LCMS, reaction monitoring, TLC-MS, process analytical technology, mass-directed purification, and liquid chromatography. The company sells through original equipment manufacturers and distributors and provides support services and training. Microsaic Systems was established in 1998 and is headquartered in Woking, United Kingdom.

ROADMap Systems

Series A in 2016
ROADMap Systems Limited is a technology company based in Cambridge, United Kingdom, specializing in wavelength selective switch (WSS) technology for fiber optic communication networks. Founded in 2013, the company addresses the growing demands of network operators by providing solutions that enable reconfigurable optical add/drop multiplexers (ROADMs). These advanced switches are designed to handle the increasing capacity required for high-speed internet data, specifically accommodating next-generation data rates of 400 Gbps. ROADMap Systems leverages four patents licensed from the Cambridge Centre for Advanced Photonics and Electronics to offer telecom and datacom applications that tackle challenges related to data rates, fiber management, power requirements, and network costs. By focusing on highly flexible optical switching capabilities, the company aims to meet the evolving needs of the telecommunications industry.

Silicon Microgravity

Seed Round in 2016
Silicon Microgravity is a Cambridge, United Kingdom based sensor technology company that develops microelectromechanical systems for oil and gas reservoir surveillance and other applications. Its gravity sensors deliver high-sensitivity gravity data and ultra-low-frequency seismic data from boreholes, enabling precise density measurements deep in reservoirs and real-time reservoir management. The technology originated as a Cambridge University spin-out, developed with support from BP and Innovate UK, and has broader uses in navigation and stabilization of intelligent systems across commercial, industrial, and military sectors. The company aims to improve efficiency, reduce costs, and support safety and environmental goals in hydrocarbon production.

Cambridge CMOS Sensors

Series C in 2015
Cambridge CMOS Sensors Limited is a semiconductor company based in Cambridge, United Kingdom, specializing in the development, manufacturing, and marketing of gas sensor solutions for air quality monitoring and breath analysis applications. Founded in 2008 as a spin-off from Cambridge University, the company produces a range of gas sensors, infrared components, and evaluation kits tailored for consumer and industrial markets, including smartphones, wearables, and smart home devices. Cambridge CMOS Sensors is recognized for its innovative micro hotplate gas-sensor technology, which focuses on monitoring hazardous gases and volatile organic compounds. This technology is designed for miniaturization, resulting in lower power consumption and faster response times, making it suitable for various applications such as smoke alarms, laboratory analysis, medical devices, automobiles, and aviation. The company has a global presence with operations in China, Europe, Japan, Korea, Taiwan, and the United States.

Cambridge CMOS Sensors

Series C in 2014
Cambridge CMOS Sensors Limited is a semiconductor company based in Cambridge, United Kingdom, specializing in the development, manufacturing, and marketing of gas sensor solutions for air quality monitoring and breath analysis applications. Founded in 2008 as a spin-off from Cambridge University, the company produces a range of gas sensors, infrared components, and evaluation kits tailored for consumer and industrial markets, including smartphones, wearables, and smart home devices. Cambridge CMOS Sensors is recognized for its innovative micro hotplate gas-sensor technology, which focuses on monitoring hazardous gases and volatile organic compounds. This technology is designed for miniaturization, resulting in lower power consumption and faster response times, making it suitable for various applications such as smoke alarms, laboratory analysis, medical devices, automobiles, and aviation. The company has a global presence with operations in China, Europe, Japan, Korea, Taiwan, and the United States.

Cambridge CMOS Sensors

Series B in 2013
Cambridge CMOS Sensors Limited is a semiconductor company based in Cambridge, United Kingdom, specializing in the development, manufacturing, and marketing of gas sensor solutions for air quality monitoring and breath analysis applications. Founded in 2008 as a spin-off from Cambridge University, the company produces a range of gas sensors, infrared components, and evaluation kits tailored for consumer and industrial markets, including smartphones, wearables, and smart home devices. Cambridge CMOS Sensors is recognized for its innovative micro hotplate gas-sensor technology, which focuses on monitoring hazardous gases and volatile organic compounds. This technology is designed for miniaturization, resulting in lower power consumption and faster response times, making it suitable for various applications such as smoke alarms, laboratory analysis, medical devices, automobiles, and aviation. The company has a global presence with operations in China, Europe, Japan, Korea, Taiwan, and the United States.

Microsaic Systems

Venture Round in 2013
Microsaic Systems develops and markets miniaturised mass spectrometry instruments based on micro-electro-mechanical systems technology. It offers the MiD platform, including 4500 MiD for pharmaceutical and biopharmaceutical applications; MiDas Automated Sampling interface for automated sampling, dilution, and injection for direct MS analysis; MiD Protein ID, a miniaturised mass spectrometer; and Masscape, an open-access software for sample method design and data analysis. Its products support LCMS, reaction monitoring, TLC-MS, process analytical technology, mass-directed purification, and liquid chromatography. The company sells through original equipment manufacturers and distributors and provides support services and training. Microsaic Systems was established in 1998 and is headquartered in Woking, United Kingdom.

Cambridge CMOS Sensors

Series A in 2012
Cambridge CMOS Sensors Limited is a semiconductor company based in Cambridge, United Kingdom, specializing in the development, manufacturing, and marketing of gas sensor solutions for air quality monitoring and breath analysis applications. Founded in 2008 as a spin-off from Cambridge University, the company produces a range of gas sensors, infrared components, and evaluation kits tailored for consumer and industrial markets, including smartphones, wearables, and smart home devices. Cambridge CMOS Sensors is recognized for its innovative micro hotplate gas-sensor technology, which focuses on monitoring hazardous gases and volatile organic compounds. This technology is designed for miniaturization, resulting in lower power consumption and faster response times, making it suitable for various applications such as smoke alarms, laboratory analysis, medical devices, automobiles, and aviation. The company has a global presence with operations in China, Europe, Japan, Korea, Taiwan, and the United States.

Lime Microsystems

Series C in 2011
Lime Microsystems Limited is a fabless semiconductor company based in Guildford, United Kingdom, founded in 2005. The company specializes in the design and manufacture of field programmable radio frequency transceiver integrated circuits tailored for various wireless applications. Its products are utilized across a wide range of sectors, including consumer communications, military, emergency services, and wireless infrastructure. Lime Microsystems' technology supports applications such as femtocells, repeaters, mobile base stations, and machine-to-machine networks, as well as advanced systems like software-defined radio and cognitive radio. The company's offerings enable wireless providers and operators to enhance service delivery and engage in diverse business sectors effectively.
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