A Glasgow-based activewear brand is the UK’s fastest-growing private company, according to the fourth annual Sunday Times 100 rankings.
Activewear brand DFYNE made 拢66.8 million in sales in the twelve months to May 2025, representing a staggering 517% average annual growth in the last three years. It sells cleverly-designed gym clothes for women and men across the world.
The annual Sunday Times ranking identifies and celebrates Britain鈥檚 100 leading entrepreneurial businesses, and showcases the people behind the most dynamic private companies.
DFYNE employs 128 people at its headquarters in Glasgow, Scotland and for founder, 32-year-old Oscar Ryndziewicz, this is the third business he has launched. He started the company using his girlfriend鈥檚 拢5,800 credit card limit (she did know).
In an interview with The Sunday Times, he reflected on the success of his business: 鈥淭here is always a bit of luck involved and anyone who has done well who says otherwise is not really telling the truth. But if you don鈥檛 try you are never going to get lucky.鈥
Scotland鈥檚 fastest-growing companies
The research for The Sunday Times 100 found on average the top 100 fastest-growing companies have increased their sales by 111% a year over the last three years to a combined 拢3.4 billion in sales. This figure is up by 拢500 million year-on-year, with the 2024 top 100 fastest growing companies achieving 拢2.9 billion in sales.
In total these companies employ 15,300 people, having created 10,500 new jobs in the last three years, with all of them planning further hires in the next 12 months – equating to around 5,300 additional roles.
Out of the 100 companies featured in the ranking more than a third (36) are based in London, with the rest spread through-out the country. This includes 18 in the northwest, 12 in the southeast, 8 in the southwest, 7 in Wales and 6 in the west Midlands.
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28 of the businesses have female founders or co-founders: they include Aimee Smale of fashion brand Odd Muse (No 4) and Olivia Jenkins of jewellery brand D. Louise (No 9).
Nearly two thirds of the companies (64) were founded in the last decade 鈥 in 2015 or after. The oldest company on the list is St Ewe Free Range Eggs (No 53). Founded in 1967 by Richard, 75, and Christine Tonks, 74, the Cornwall business is now led by their daughter, Rebecca Tonks, 48.
The majority of companies are self-funded. Only 39 of the companies on the list have raised external equity funding since 2011, including drinks brand TRIP (No 28), which has raised over 拢35 million through five funding rounds. The rest have used a combination of debt and profits to fund their growth.
Jon Yeomans, business editor of The Sunday Times, said: “The Sunday Times 100 is the definitive annual ranking of Britain鈥檚 fastest-growing private companies and demonstrates the remarkable entrepreneurial spirit thriving across Britain. DFYNE鈥檚 meteoric rise is a testament to the power of innovation and resilience in the private sector. It鈥檚 inspiring to see how these businesses are not only achieving phenomenal growth, but also creating thousands of new jobs and opportunities.”
Mo Syed, Head of Barclays Private Bank and Wealth Management UK and Crown Dependencies, said: 鈥淲e are proud to be the lead sponsor of The Sunday Times 100 Fastest Growing Companies once again. This prestigious ranking celebrates the innovation, ambition and resilience of Britain鈥檚 entrepreneurs 鈥 qualities that we at Barclays Private Bank are privileged to support. As these dynamic businesses scale and evolve, we鈥檙e committed to being the trusted partner for their strategic wealth, investment and succession planning, supporting them at every stage of their personal and business journey.鈥
The list was published today, June 27, online at thesundaytimes.com/100 and available as a supplement with the print edition of their newspaper this Sunday, June 29.
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