Martlet Capital

AllFocal Optics specializes in nanophotonic technology for display enhancement. Its innovative solutions aim to provide natural visual clarity and comfort, addressing physical discomforts such as headaches associated with current AR/VR glasses.

Infinitopes is a cancer research organization focused on immunotherapy to prevent metastasis and improve survival. The company develops a platform that combines efficient vector delivery with tumor target identification technologies to enable early-stage clinical trials and therapies designed to stop cancer before it spreads. Its cancer vaccine platform aims to prevent metastases by identifying tumor-specific peptides with high accuracy and delivering them through a durable viral vector, supporting post-surgical relapse prevention for esophageal cancer patients and advancing earlier, smarter immunotherapy. By integrating immune system strengthening and targeted peptide delivery, Infinitopes seeks to create treatments that intervene at early stages to reduce relapse and improve outcomes.

Founded in 2018, Xampla develops plant-based materials derived from pea protein to replace microplastics. Its product range includes microcapsules for homecare and personal care products, films, coatings, and single-use plastics for packaging applications.

Spotta designs and delivers smart pest monitoring systems for hotels and lodging providers to detect bed bugs early. The company develops ultra-low-power insect monitoring sensors, which are battery-powered and provide notifications when bed bugs are detected, with analysis to reduce false alarms. Its bed pod system monitors infestations to enable rapid containment and easier, less expensive treatment. Founded in 2018 and based in Cambridge, United Kingdom, Spotta focuses on preventing bed bug entry to rooms and supporting proactive pest management for hospitality operators.

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.

Strolll is a digital health company focused on improving mobility for people with neurological disorders. It develops a B2B digital therapeutics platform that delivers clinically validated rehabilitation software on off-the-shelf augmented reality glasses. The platform supports both in-clinic (synchronous) and at-home (asynchronous) therapy, enabling rehabilitation clinics to scale services, improve access, and reduce the cost of neurorehabilitation. By personalizing therapy, the solution aims to increase patient adherence and outcomes while streamlining administrative processes and delivering meaningful data to clinics.

Pencil Biosciences is focused on advancing gene-editing technology through the development of a novel, programmable genome-modulation platform. This innovative approach seeks to address the limitations of existing gene-editing technologies, providing new therapeutic options for patients with rare diseases. By enhancing the precision and efficacy of genome modulation, Pencil Biosciences aims to facilitate a wide range of applications in the medical field, ultimately supporting healthcare professionals in overcoming the challenges associated with traditional gene-editing methods.

RoboK develops innovative computer vision technology to enhance safety and efficiency in industrial workplaces. Founded in 2017, the company transforms on-site visual data from CCTV cameras into valuable actionable insights for critical infrastructure operators.

PharmEnable Limited is a drug discovery company based in Cambridge, United Kingdom, that specializes in the design of small molecule drugs through the integration of medicinal chemistry and artificial intelligence computational methods. Established in 2016, the company has created a rapid and cost-effective approach to identify superior chemical starting points, thereby facilitating the discovery of essential new medicines.

NunaBio is a privately-owned specialist DNA development company based in England, United Kingdom. The company focuses on chemical and biological technologies, providing a diverse array of products and services, including long and short deoxyribonucleic acid products available in various scales, from microgram to gram. NunaBio is involved in contract research and development, as well as manufacturing, offering capabilities in cell therapies, vaccines, diagnostics, gene therapies, and advanced DNA biosensing. By delivering these innovative solutions, NunaBio aims to support healthcare professionals in their efforts to treat patients effectively.

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.

Kalium Health Ltd is a medical technology company based in Cambridge, United Kingdom, that specializes in designing and manufacturing innovative tests for blood potassium concentration. Founded in 2018 and previously known as Kalium Diagnostics Ltd, the company focuses on patient-centric approaches to manage kidney disease, which significantly impacts healthcare costs. Kalium Health is developing a user-friendly finger-prick blood test that allows patients to monitor their potassium levels conveniently and affordably, addressing a critical risk associated with kidney disease. This technology aims to provide real-time, clinically actionable health insights into cardiorenal diseases, thereby transforming the standard of care for millions of patients. With a clear regulatory pathway and a targeted go-to-market strategy, Kalium Health is positioned to make a significant impact in the field of kidney care.

Semarion is a Cambridge-based company that combines microchip industry materials engineering with cell biology. It aims to revolutionize drug discovery by developing a platform that uses ultra-miniaturized, magnetically steerable wells for adherent cell screening.

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 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 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.

Spotta designs and delivers smart pest monitoring systems for hotels and lodging providers to detect bed bugs early. The company develops ultra-low-power insect monitoring sensors, which are battery-powered and provide notifications when bed bugs are detected, with analysis to reduce false alarms. Its bed pod system monitors infestations to enable rapid containment and easier, less expensive treatment. Founded in 2018 and based in Cambridge, United Kingdom, Spotta focuses on preventing bed bug entry to rooms and supporting proactive pest management for hospitality operators.

Founded in 2016, Qkine is a biotechnology company based in Cambridge, UK. It specializes in manufacturing high-purity, animal-free growth factors, cytokines, and other complex proteins for life science applications, including stem cell culture, organoid research, and regenerative medicine.

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.

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.

Kalium Health Ltd is a medical technology company based in Cambridge, United Kingdom, that specializes in designing and manufacturing innovative tests for blood potassium concentration. Founded in 2018 and previously known as Kalium Diagnostics Ltd, the company focuses on patient-centric approaches to manage kidney disease, which significantly impacts healthcare costs. Kalium Health is developing a user-friendly finger-prick blood test that allows patients to monitor their potassium levels conveniently and affordably, addressing a critical risk associated with kidney disease. This technology aims to provide real-time, clinically actionable health insights into cardiorenal diseases, thereby transforming the standard of care for millions of patients. With a clear regulatory pathway and a targeted go-to-market strategy, Kalium Health is positioned to make a significant impact in the field of kidney care.

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.

Closed Loop Medicine designs and develops healthcare technology software that optimizes drug dosing on an individual level through integrated digital therapies. The company focuses on improving patient outcomes for chronic diseases, with products in development for hypertension and insomnia.

Founded in 2011, PervasID specializes in developing wide area RFID systems that offer location capabilities based on the EPC Class1 Gen2 standard. The company's technology enables accurate tracking of goods and assets across various industries.

Undo Ltd., established in 2005, specializes in developing debugging tools for software developers. Its flagship product, LiveRecorder, records and replays software execution to aid in identifying and fixing programming errors. UndoDB, another key offering, provides an interactive reversible debugger for C/C++ on Linux and Android platforms. The company serves industries such as data management, networking, electronic design automation, and finance, with offices in Cambridge, UK, and San Francisco, CA.

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 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.

Rovco Ltd is a company based in Bristol, United Kingdom, specializing in underwater hydrographic survey and inspection services through the use of remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs). Founded in 2015, Rovco serves clients in the oil, gas, and renewable energy sectors by offering advanced technologies that enhance the management and inspection of subsea assets. The company's innovative solutions include 3D photogrammetry, which creates detailed 3D models from high-resolution photographs, allowing clients to assess their assets for damage, corrosion, and marine growth. By leveraging artificial intelligence and machine learning, Rovco provides autonomous subsea robotics and advanced inspection capabilities, enabling clients to make informed engineering decisions and undertake preventative maintenance, thereby reducing project risks and costs.

Closed Loop Medicine designs and develops healthcare technology software that optimizes drug dosing on an individual level through integrated digital therapies. The company focuses on improving patient outcomes for chronic diseases, with products in development for hypertension and insomnia.

Audio Analytic Ltd., established in 2008, specializes in developing sound recognition software for consumer electronics. Based in Cambridge, UK, with an office in San Francisco, the company offers embedded software platforms, ai3™ and ai3-nano™, which enable products like smart speakers, video doorbells, and earbuds to understand and respond to their environment through sound. Their software is licensed to leading consumer tech companies, providing context-based intelligence to enhance user experiences.

Techspert is an expert network platform that uses artificial intelligence and machine learning to identify, index, and connect businesses with domain-specific experts for industry insights. Originating in the healthcare sector, the company recognized how slow and costly traditional knowledge sourcing could be and extended its approach to serve clients across sectors worldwide. The platform analyzes web material to build accurate expert profiles and map connections between individuals and their affiliated institutions, enabling clients to find, evaluate, and source key opinion leaders globally. The team includes computer science PhDs, software developers, and client relations professionals, and the company serves large consultancies and private equity groups. Techspert aims to democratize access to knowledge and improve decision making by making expertise more discoverable and actionable.

Exonate is a biotechnology company focused on developing small molecule drugs that modulate alternative messenger RNA splicing. It specializes in ophthalmology, with a primary focus on treating diabetic retinopathy and diabetic macular oedema (DMO), as well as wet age-related macular degeneration (wAMD). The company's lead program aims to provide superior efficacy through topical agents in preclinical models of wAMD.

Undo Ltd., established in 2005, specializes in developing debugging tools for software developers. Its flagship product, LiveRecorder, records and replays software execution to aid in identifying and fixing programming errors. UndoDB, another key offering, provides an interactive reversible debugger for C/C++ on Linux and Android platforms. The company serves industries such as data management, networking, electronic design automation, and finance, with offices in Cambridge, UK, and San Francisco, CA.

Psyomics specializes in the development of proteomic diagnostics aimed at improving early diagnosis and treatment outcomes for individuals with neuropsychiatric disorders. The company offers web-based assessment triage designed to facilitate diagnostic and pathway prediction for mental health conditions. By integrating digital profiling with cutting-edge biological research, Psyomics enhances diagnostic accuracy and supports primary care practitioners in effectively managing their patients' mental health needs. This innovative approach digitally replicates a psychiatric assessment at the initial point of contact, thereby enabling patients to achieve better recovery outcomes from mental health disorders.

Plumis Limited is a London-based company that specializes in the design and manufacture of innovative fire suppression systems. Established in 2008, Plumis focuses on providing alternatives to traditional home fire sprinklers, particularly for residential refurbishments and new builds. Their flagship product, Automist Smartscan, is a modern fire suppression system that operates automatically and requires less plumbing infrastructure, making it easier to install with minimal disruption. Plumis's solutions are particularly suited for high-risk environments, such as sheltered housing and care homes, and are trusted by homeowners, landlords, and fire inspectors in the United Kingdom and the United States. The company has received recognition for its innovative approach, having won the ‘Innovation of the Year’ award at the Make UK Manufacturing Awards in January. With over 10,000 installations, Plumis aims to enhance fire safety while reducing water damage associated with traditional sprinkler systems.

Spectral Edge Ltd, established in 2011 and headquartered in Cambridge, UK, specializes in image enhancement technologies. The company develops innovative solutions such as Phusion, which improves image and video quality by leveraging information outside the visible spectrum, and Eyeteq, a video personalization technology that enhances TV accessibility for color-blind individuals. Spectral Edge's products cater to consumer electronics manufacturers and service providers, serving applications like computational photography, security, and consumer electronics. As of 2019, the company operates as a subsidiary of Apple Inc.

Repositive Ltd is a company based in Cambridge, United Kingdom, that operates an online platform facilitating access to human genomic data for researchers. The platform aggregates metadata from various genomic datasets worldwide, enabling users to discover and share data effectively. It offers features for managing data sources, enhancing visibility within the research community, and fostering collaborations. Additionally, Repositive provides services such as data scouting, access applications, policy reviews, and the establishment of data catalogues. The company has also developed the PDX Consortium to create a pre-competitive resource for patient-derived xenograft molecular data. Originally known as Nucleobase Limited, Repositive Ltd was incorporated in 2013 and rebranded in January 2015 to reflect its focus on genomic data accessibility and collaboration.

Axol Bioscience Ltd., established in 2012 and based in Little Chesterford, United Kingdom, specializes in human cell culture systems for research purposes. The company produces and supplies various types of human cells derived from induced pluripotent stem cells (iPSCs), such as cardiomyocytes, neural stem cells, and astrocytes, along with primary cells like endothelial cells and fibroblasts. Axol also provides essential media, reagents, and growth factors to maintain these cell cultures. Additionally, they offer custom services including iPSC reprogramming, differentiation, genome editing, and cell sourcing tailored to clients' needs. Their products are distributed globally through strategic partners in various countries across Asia, North America, Europe, and internationally.

Tripism Ltd. is a travel platform that supports business and frequent travelers by providing curated recommendations for accommodation, dining, meetings, and leisure activities. The service enables users to share reviews and travel insights with their professional network, facilitating informed decision‑making for corporate travel programs. Founded in 2014, the company is based in Cambridge, United Kingdom.

Dogtooth is a technology start-up based in Cambridge that specializes in robotic solutions for soft fruit picking. The company has developed advanced intelligent robots capable of navigating rows of strawberries and raspberries. These robots are designed to detect and locate ripe fruit, efficiently pick it, and check its quality before placing it into punnets. By automating the fruit harvesting process, Dogtooth enables businesses to replace traditional hand-picking methods, resulting in significant time savings and improved operational efficiency.

Cambridge Mask Co specializes in the manufacturing and distribution of advanced consumer pollution masks that utilize military-grade filter technology originally developed for chemical, nuclear, and biological warfare protection. These masks are designed to filter nearly 100% of viruses, bacteria, gases, and particulate pollution, providing users with effective protection against air pollution. Available in a variety of sizes and patterns suitable for all ages, Cambridge Mask Co serves a diverse clientele, including organizations such as the United Nations, NetJets, and British Airways. The company's commitment to health and safety is evident in its use of activated carbon cloth for superior filtration, ensuring that users can breathe cleaner air and maintain a healthier lifestyle.

Converge is a technology company based in London, United Kingdom, specializing in hardware and software solutions for the collection, storage, and analysis of sensor data. The company develops transmitters that connect to various digital and analog sensors, converting them into wireless networked devices. Its software platform enables the storage, analysis, and visualization of data generated by these sensors. Converge's solutions are designed to facilitate data connectivity in sectors such as healthcare, where they allow doctors to manipulate and visualize patient information to tailor treatments effectively. Additionally, the company addresses the needs of the construction industry by providing automated data collection and analytics to replace manual monitoring processes. Through its innovative approaches, Converge is contributing to the advancement of wireless sensor networks within the industrial internet of things.

Founded in 2013, Oxford Space Systems specializes in developing and manufacturing innovative deployable hardware structures for space environments. The company's products include deployable panels/hinge systems, composite linear boom systems, and deployable antennas, designed to be lighter, less complex, and lower cost than traditional alternatives. With a team of experienced professionals and backing from venture capital funds, Oxford Space Systems has successfully completed government co-developments and commercial contracts with leading satellite builders worldwide.

Outside View is a technology company specializing in predictive analytics for the real estate industry. It has developed an algorithm designed to forecast which properties are most likely to sell within the next six months, empowering real estate agents to better target potential sellers and enhance their marketing strategies.

PatientSource is a provider of electronic health record systems and integrated clinical software for NHS and private healthcare providers. Its platform includes hospital care modules, community mobile health, patient administration, electronic case notes, electronic prescribing, electronic investigations, observations, electronic discharge, and diabetes management, along with consulting services and interoperability capabilities. The system supports secure transmission of patient information such as referrals and discharge letters via secure messaging and integrated clinical pathways with multidisciplinary teams, helping clinicians save time, improve patient safety, and enhance quality of care. Founded in 2010 and based in Cambridge, United Kingdom.

TransparentChoice Ltd., established in 2013 and based in Cambridge, UK, offers an online decision-making software platform. It enables teams and organizations to structure complex decisions into projects, collect meaningful input, analyze data, set actionable priorities, and make strategic choices that align with their goals.

Vantage Power Ltd. is a London-based company that specializes in the design and manufacture of electric and hybrid systems for buses and heavy-duty vehicles. Founded in 2011, the company provides a range of hybrid and electric powertrain solutions, including hybrid battery systems, drive systems, range extenders, and custom battery solutions. Vantage Power focuses on retrofitting existing buses with hybrid powertrains, allowing operators to significantly reduce fuel consumption and emissions at a lower cost compared to new hybrid bus purchases. The company’s engineering team, which draws expertise from the heavy-duty vehicle, Formula 1, and aerospace sectors, is dedicated to optimizing system performance and reliability. Vantage Power also offers advanced technologies in system design and integration, telemetry, control systems, and battery solutions, contributing to more efficient and environmentally friendly transportation options. As of 2019, Vantage Power operates as a subsidiary of Allison Transmission Holdings, Inc.

Captive Media Ltd is a British company that specializes in developing interactive entertainment systems for washrooms, particularly targeting male users. The company has created a patented urinal-mounted gaming console that features networked digital video screens positioned above men's urinals. These screens display a mix of engaging content and advertisements. The consoles utilize infra-red sensors to detect a user's stream, allowing them to interact with various games such as trivia quizzes and sports simulations without physical contact. Captive Media aims to enhance the average dwell time of 55 seconds at urinals by providing an entertaining and interactive experience. The units are designed to be retrofitted into existing washroom facilities, requiring only power and internet connectivity, and are built to be waterproof and vandal-proof. The company's installations can be found in a range of venues, including bars, clubs, hotels, sports facilities, airports, shopping malls, and corporate offices throughout the UK and the EU. Founded in 2007 and based in Chelmsford, the company serves brands and agencies by leveraging this unique advertising medium.

Arachnys Information Services Limited, founded in 2010 and based in Cambridge, United Kingdom, specializes in developing cloud-based solutions that enhance the assessment of financial crime risks and compliance with customer due diligence, know your customer, and enhanced due diligence regulations. The company offers a web crawler and deep-web search engine that enables access to hard-to-reach information, particularly from emerging markets such as India, China, Russia, and the Middle East. Arachnys addresses the challenges posed by fragmented and disorganized data in these regions by employing advanced spidering and scraping technology, which allows businesses to extract valuable insights from siloed corporate and governmental datasets. Its services cater to investment banks, hedge funds, law firms, accountants, and risk consultancies seeking growth opportunities in complex markets while minimizing associated risks.

Plumis Limited is a London-based company that specializes in the design and manufacture of innovative fire suppression systems. Established in 2008, Plumis focuses on providing alternatives to traditional home fire sprinklers, particularly for residential refurbishments and new builds. Their flagship product, Automist Smartscan, is a modern fire suppression system that operates automatically and requires less plumbing infrastructure, making it easier to install with minimal disruption. Plumis's solutions are particularly suited for high-risk environments, such as sheltered housing and care homes, and are trusted by homeowners, landlords, and fire inspectors in the United Kingdom and the United States. The company has received recognition for its innovative approach, having won the ‘Innovation of the Year’ award at the Make UK Manufacturing Awards in January. With over 10,000 installations, Plumis aims to enhance fire safety while reducing water damage associated with traditional sprinkler systems.