Mark Gretton
Angel Investor @ Rinkelberg Capital
London, United Kingdom
Mark Gretton is a Series A investor at Rinkelberg Capital in London focused on Music and Music Streaming. Mark is the former CTO at TomTom and was a Director of Psion Computers. Mark is highly respected as a leading technologist.
- Total investments:
- 4
- Last investment:
- Lead investor:
- 25%
Last updated:
For AI agents: llms.txt
Industries Mark Gretton invests in
Stages Mark Gretton invests in
Countries Mark Gretton invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Series A
- $2M–$2M
Investment Focus
Industry
- Music 2 (50%)
- Music Streaming 2 (50%)
- Consumer Electronics 2 (50%)
- TV 1 (25%)
- DRM 1 (25%)
Stage
- Series A 2 (50%)
- Series B 1 (25%)
- Series E 1 (25%)
Country
- United States 2 (50%)
- United Kingdom 2 (50%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Eggtronic has been revolutionizing the world of power electronics and wireless power since 2012.Based in San Francisco, USA, Modena, Italy and Guangzhou, China, Eggtronic develops cutting-edge, environmentally-friendly and energy-efficient technologies, with more than 150 international patents granted worldwide.In the field of power conversion,Eggtronic launched the smallest and most efficient AC/DC converter in the world, thanks to our patented EcoVoltas technology.In the field of wireless power, Eggtronic developed a completely new wireless power transfer. It is able to charge simultaneously and with total position freedom any electronic and electric device, including laptops, monitors, TVs, tablets, smartphones, and home appliances, ensuring at the same time the higher power transfer efficiency and high scalability.2020 saw the launch of Einova by Eggtronic, a high-end retail brand, while a new ICs division will produce its first microchips starting the beginning of 2021.Whether through B2B partnerships or for everyday consumers, Eggtronic helps make modern life easier, more efficient and more connected. | $12M / Series B / Dec 19, 2022 | ||
| MParticle is a customer data platform for brands to accelerate growth. With MParticle, brands can unify data and simplify partner integrations with enterprise-class security and reliability. It improves marketing, advertising, and analytics by connecting data seamlessly across channels.Sophisticated marketers at companies like Walmart, Starwood,NBC Universal, Spotify, and Airbnb use MParticle to integrate and orchestrate their entire growth stack, allowing them to win in key moments of the customers' journey. It was recognized as one of Crain’s 100 Best Places to Work in New York City and named a “Vendor to Watch” in Gartner’s 2017 Digital Marketing Hubs Magic Quadrant report.MParticle is headquartered in New York City with offices in San Francisco, Seattle, Florida, and London. | $150M / Series E / Oct 05, 2021 | ||
| British music streaming company Magic Media Works Limited (trading as ROXi) is backed by Kylie Minogue and Robbie Williams, bringing friends and family together to enjoy free unlimited music video streaming, exclusive music video channels, karaoke, music games and more. ROXi’s free TV Music App is available from launch on Sky Q, Fire TV, Android TVand Google TV including compatible Sony Bravia, Panasonic, Philips, Toshiba, TCL, HiSense and Shield Smart TVs and set-top boxes with Samsung TV and others coming soon. ROXi is also available as a Console with Microphone Controller for use with any TV. ROXi is backed by all the major and leading independent record labels with all the original music videos and over 70 million music releases. | $2M / Series A / Nov 07, 2016 | ||
| The Electric Jukebox Company was established by Rob Lewis, previously founder of music service provider Omnifone, and Ernst & Young Entrepreneur of The Year, when he tried to find an easy to use music streaming system for the home to replace his mum and dad’s old HiFi. He found music streaming services alienate many consumers by forcing them tocommit to credit card subscriptions and to endure needlessly complicated apps for computers and smartphones when most people just want easy access to the music they love. In a YouGov poll commissioned for The Electric Jukebox Company only 8% of consumers subscribed to music streaming in the UK, while less than 50 million people subscribed worldwide. | $2M / Series A / Nov 07, 2016 |
Co-Investors
About Rinkelberg Capital
Rinkelberg Capital is an investment office that helps entrepreneurs to grow their business.
Rinkelberg Capital Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Marc Slendebroek
Founder and CEO
|
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FAQ
What does Mark Gretton invest in?
Mark Gretton invests primarily in Music, Music Streaming and Consumer Electronics startups, most often at Series A and Series B stage. Most of the 4 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Mark Gretton's check size?
Mark Gretton typically joins rounds of $2M–$2M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Mark Gretton participates in.
How do I contact Mark Gretton?
Public channels for Mark Gretton include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Mark Gretton last invest?
The most recent investment recorded for Mark Gretton closed in Dec 2022. Shizune tracks 4 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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