Klaas De Boer

Managing Partner at Entrepreneurs Fund

📍 London, England Metropolitan Area, United Kingdom🔄 Updated September 2026💼 20 investments📅 19 years investing🗓 Last invested Mar 2024
VC🌍 United Kingdom20+ investments
20
Total investments
4
Early stage
2
Mid stage
4
Late stage
19y
Years active

Portfolio

14 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Mar 2024
Fashion for Good is the global initiative that’s here to make all fashion good. By sparking and scaling innovation, by offering practical action in the form of support, funding and roadmaps, and by fostering sector-wide collaboration rather than competition, we enable the daring invention and widespread adoption of good fashion practice. With an Innovation Hub in Amsterdam that supports a global network of change makers, we are reimagining how fashion is designed, made, worn and reused for the good of people and the planet.
Board Member
Jan 2023
At veriNOS pharmaceuticals GmbH, we focus on the clinical development of a drug that specifically inhibits a defined cascade that is relevant and common in different disease settings. The activation of iNOS with subsequent excessive production of cell damaging radicals and massive excitotoxic glutamate increase is of crucial importance in all of our indications of interest. Our goal of using Ronopterin is to selectively inhibit upregulated iNOS to reduce radicals and excitotoxic glutamate levels. Our management team consists of experienced biopharma executives with complementary backgrounds, including corporate governance, finance, medicine and science.
Board Member
Nov 2020
Hello, we're D3O - a fast growth engineering, design and technology company based in the UK, with offices in the US and China. We’re a collective of engineers, chemists, product designers and industry experts who work to find and solve the problems that matter. Since our days as a start-up, we’ve been making pioneering protective products used worldwide by soldiers, professional athletes, industrial workers and people like us. We enable and empower people who use our products to take risks, challenge their limits and stay safe. For the world-class brands we’re proud to partner with, we create market-defining products that add value and create an advantage. So, whether it’s light-weight aerodynamic protection for skiers and motorcyclists, precision safety equipment for oil rig workers or the everyday magic that keeps your smartphone in one piece, it’s all part of a proven formula of how we do things.
Angel Investor
Dec 2019
Speaksee is a company with a strong sense of purpose: making conversations accessible to everyone. We are a team of passionate engineers, designers, and marketers who believe in ability as opposed to disability. We want to use technology to allow people to be the best version of themselves. With both of his parents being deaf, co-founder & CEO Jari Hazelebach experienced the communication difficulties that the deaf and hard-of-hearing have to face, especially in group conversations. At Speaksee, we are working hard to solve this. Speaksees Microphone Kit is the worlds first microphone system able to accurately transcribe group conversations to text in real time (patented). In different colours for each person. Even when there is background noise. This way people who are Deaf or hard-of-hearing can easily read whats being said. Speaksees professional product Soundshape 1 Pro can make all your events accessible to deaf, hearing impaired and internatio- nal guests. Using AI technology, visitors can choose to view live subtitles and translations directly to their smart device, or overlayed onto existing presentation screens in the theatre. Make sure everyone can fully participate in your event, regardless of their language or disability. Leave a message and join our mission to make conversations accessible to everyone.
Angel Investor
Mar 2019
Finboot’s technology provides green supply chain management for the worlds largest capital-intensive manufacturing companies. Our technology traces carbon emissions and minimises risk through immutable data. Finboot is backed by SABIC and Repsol. Finboot has created the first green supply chain management suite with features including integrated traceability, allowing you to track carbon emissions, automate digital product passports, create your sustainability credits and facilitate compliance. Finboot is headquartered in Cardiff with a base in Barcelona.
Board Member
Mar 2019
Oomph! Wellness (Part of Person Centred Software) is the UK’s leading wellbeing business for older adults. We enhance mental, physical and emotional wellbeing through innovative exercise and activity solutions, from training and supporting teams to provide awesome exercise classes and creative activities, to exciting, engaging days out. We’re united by the unshakeable belief that everyone deserves a great life. A quality life. A full life. So it’s our job to ensure that however old you are, you’re able to live life to the full. Whatever your passion, interest and physical ability, our team of dedicated experts work with you to enjoy it. We have one life, let’s give it some Oomph! To find out more about how Oomph! can help your organisation please contact us on 0203 601 6363 or email hello@oomph-wellness.org
Angel Investor
Feb 2019
CCm Technologies is an environmental technology company based near Oxford, United Kingdom focused on resource optimisation. CCm's technology converts captured CO2 and other waste streams (such as Ammonia and Phosphate) into stable value-added materials with multiple uses across global priority sectors of food/agriculture, advanced materials & energy storage. The patented process is based on high primary capture efficiencies from novel cellulose/amine capture material which retain 95% of flue sourced CO2. Heat storage is an additional application of the core technology. Previously known as CCm Research.
Angel Investor
Jun 2018
Plantics B.V., founded in 2014, is a spin-off from the University of Amsterdam and builds on a revolutionary invention. This has resulted in a unique group of 100% bio-based thermoset resins and the world’s first 100% bio-based thermoset materials. Together with its partners, Plantics develops high-quality, circular, and CO2 negative products. Plantics has already received several prestigious awards and subsidies, such as the European Forum of Biobased Industries Pitch Fest award at the end of 2018 and a European SME Horizon 2020 in 2019. Recently, Plantics has been elected together with its partner ‘Vepa the furniture factory’ as the winner of the global innovation award "Renewable Material of the year 2021".
Board Member
Jan 2018
SmartKem is reshaping the world of electronics with its disruptive organic thin-film transistors (OTFTs) that will drive the next generation of displays. Our unique and patented TRUFLEX® semiconductor and dielectric inks, or liquid electronic polymers, are used to make a new type of transistor that will revolutionize the display industry. SmartKem’s inks enable low temperature printing processes that are compatible with existing manufacturing infrastructure to deliver low-cost displays that outperform existing models. SmartKem's electronic polymer platform can be used in a number of display technologies including microLED, miniLED and AMOLED displays for next generation televisions, laptops, augmented reality (AR) and virtual reality (VR) headsets, smartwatches and smartphones.
Angel Investor
Dec 2015
dopay is a fintech company that delivers smart, modern, and best in class payroll payment solutions, built on secure and fast technology. We believe every employee and worker deserves access to financial services with dignity — digital financial services built on global standards and the latest technologies. And we believe every business owner deserves a smart, simple, and secure system to manage payroll without complexity, saving them time and effort so they can focus on what matters most — their business and their people. That’s why we designed the entire dopay ecosystem to serve all types of companies and employees — especially sectors that struggle to access banking services — helping them shift to a modern, best in class payroll payout solution with no minimum or maximum employee requirements. Our vision is that every person, regardless of their job or income, has the right to access high quality financial services easily, simply, and with dignity. And we are building this ecosystem day by day to make sure no one gets left behind. This isn’t a luxury — it’s a basic right for everyone who works and earns a living.
Board Member
Jun 2010
We are a specialty pharmaceutical company focused on the development and commercialization of products for patients treated by ear, nose and throat (ENT) and allergy specialists. Our first commercial product, XHANCE® (fluticasone propionate) nasal spray, 93 microgram (mcg), is a therapeutic utilizing our proprietary Exhalation Delivery System™ (EDS®) that delivers a topically-acting corticosteroid for the treatment of chronic rhinosinusitis with nasal polyps and, if approved, chronic rhinosinusitis without nasal polyps (also known as chronic sinusitis). In September 2017, the U.S. Food and Drug Administration (FDA) approved XHANCE for the treatment of nasal polyps in patients 18 years of age or older. XHANCE was made widely available through commercial channels in April 2018. In March and June 2022, we announced positive top line results from our two Phase 3b clinical trials (ReOpen1 and ReOpen2) of XHANCE for a follow-on indication for the treatment of chronic sinusitis. In February 2023, we submitted a prior approval efficacy supplement (sNDA) to support the approval of a new indication for XHANCE for the treatment of chronic rhinosinusitis. If the sNDA is approved, XHANCE has the potential to be the first drug therapy approved by the FDA for the treatment of chronic sinusitis. As of February 20, 2023, we had a total of 141 full-time employees all of whom are in the United States, and no part-time employees. Culture is a critical element in the management of our organization. Our colleagues are focused on driving our business with the Optinose values as the foundation for all our efforts. Our goal is that each colleague feels a deep connection to what they do, loves coming to work and is aligned to our One Mission – to improve lives. Our values of Authenticity, Fearless Conversations, Friendship, Openness, Perseverance and Possibility Thinking guide our actions and decisions.
Board Member
Jul 2009
Established in 2002, General Fusion is a global leader in the race to commercialize clean fusion energy. We are pursuing a uniquely practical approach, Magnetized Target Fusion, and aim to provide zero-carbon fusion power to the grid in the early to mid-2030s. Today at our state-of-the-art labs in Richmond, BC, we’re operating a groundbreaking fusion demonstration machine called Lawson Machine 26 (LM26), designed to achieve transformational technical milestones and accelerate General Fusion’s technology to commercialization. Our path to market is funded by a global syndicate of leading energy venture capital firms, industry leaders, and technology pioneers. Learn more at www.generalfusion.com.
Board Member
Sep 2008
Lifeline Scientific Organ Recovery Systems is the transplant community’s leading provider of products and services for donor organ recovery, preservation and transport. Based in Chicago, with regional offices in Europe (Brussels), and South America (São Paulo), we currently serve 229 transplant programmes in 36 countries with our LifePort family of products and organ preservation solutions.
Board Member
Apr 2007
vasopharm is dedicated to the discovery and development of novel therapeutics for the treatment of cerebro- and cardiovascular diseases and their consequences.
Experience · 26 entries
All (26)
Investments (20)
Founder (2)
Board (15)
2025
2024
Board Member
Mar 2024
Fashion for Good is the global initiative that’s here to make all fashion good. By sparking and scaling innovation, by offering practical action in the form of support, funding and roadmaps, and by fostering sector-wide collaboration rather than competition, we enable the daring invention and widespread adoption of good fashion practice. With an Innovation Hub in Amsterdam that supports a global network of change makers, we are reimagining how fashion is designed, made, worn and reused for the good of people and the planet.
2023
Board Member
Jan 2023
At veriNOS pharmaceuticals GmbH, we focus on the clinical development of a drug that specifically inhibits a defined cascade that is relevant and common in different disease settings. The activation of iNOS with subsequent excessive production of cell damaging radicals and massive excitotoxic glutamate increase is of crucial importance in all of our indications of interest. Our goal of using Ronopterin is to selectively inhibit upregulated iNOS to reduce radicals and excitotoxic glutamate levels. Our management team consists of experienced biopharma executives with complementary backgrounds, including corporate governance, finance, medicine and science.
2020
Board Member
Nov 2020
Hello, we're D3O - a fast growth engineering, design and technology company based in the UK, with offices in the US and China. We’re a collective of engineers, chemists, product designers and industry experts who work to find and solve the problems that matter. Since our days as a start-up, we’ve been making pioneering protective products used worldwide by soldiers, professional athletes, industrial workers and people like us. We enable and empower people who use our products to take risks, challenge their limits and stay safe. For the world-class brands we’re proud to partner with, we create market-defining products that add value and create an advantage. So, whether it’s light-weight aerodynamic protection for skiers and motorcyclists, precision safety equipment for oil rig workers or the everyday magic that keeps your smartphone in one piece, it’s all part of a proven formula of how we do things.
2019
Angel Investor
Dec 2019
Speaksee is a company with a strong sense of purpose: making conversations accessible to everyone. We are a team of passionate engineers, designers, and marketers who believe in ability as opposed to disability. We want to use technology to allow people to be the best version of themselves. With both of his parents being deaf, co-founder & CEO Jari Hazelebach experienced the communication difficulties that the deaf and hard-of-hearing have to face, especially in group conversations. At Speaksee, we are working hard to solve this. Speaksees Microphone Kit is the worlds first microphone system able to accurately transcribe group conversations to text in real time (patented). In different colours for each person. Even when there is background noise. This way people who are Deaf or hard-of-hearing can easily read whats being said. Speaksees professional product Soundshape 1 Pro can make all your events accessible to deaf, hearing impaired and internatio- nal guests. Using AI technology, visitors can choose to view live subtitles and translations directly to their smart device, or overlayed onto existing presentation screens in the theatre. Make sure everyone can fully participate in your event, regardless of their language or disability. Leave a message and join our mission to make conversations accessible to everyone.
Show all 26 entries ↓
Investment activity
2007–2024 · 20 investments
200742008120092201012011120131201512018220194202012023120241
Recent (last 2 years)Earlier