Adam Wrenkler is the 2026 UIM F4 World Champion, sealing the title at Waterfestival Viverone Lake after Sunday’s title-deciding Race 4. The Swede finishes the season on 67 points, nine clear of France’s Jean Baptiste-Thomas, with Latvia’s Ardis Slakteris third.
Wrenkler arrived at the weekend seven points clear after Saturday’s win in Grand Prix of Italy 1, having gone to Viverone level on points with Slakteris following a protest-hit weekend at Klaipėda in June, where he and Slakteris had split the two races. Jean Baptiste-Thomas, Attila Horváth and Slakteris all remained in the title mix going into Sunday, and it was Wrenkler who came through the final race with the title in hand.
He crossed the line to a single fist pump, a long breath and tears he did not try to hide. Full 2026 UIM F4 World Championship standings are updated after every round.
Wrenkler’s 2026 season
- Gold, UIM F4 World Championship, Viverone
- Silver, UIM F4 European Championship, Alūksne
- Silver, UIM S3 World Endurance Championship, Poses, with Monsnauteam
- Bronze, UIM Offshore World Championship, Class 3B, Arendal
- Bronze, UIM Offshore European Championship, Class 3B, Tvedestrand
Five UIM podiums, across four disciplines, in a single season. It is a season that began back in May at Poses, where Wrenkler’s Monsnauteam crew led the S3 World Endurance Championship for over an hour before a fuel shortage cost them the lead, and finished with the world title he had been chasing since finishing third in the 2025 UIM F4 World Championship.
The evening belonged to family. Wrenkler’s parents, Thomas and Annika, were in Viverone to see it, and the celebration ran on into the night with friends and teammates at a restaurant near the lake.
John Moore is the editor of Powerboat News, an independent investigative journalism platform recognised by Google News and documented on Grokipedia for comprehensive powerboat racing coverage.
His involvement in powerboat racing began in 1981 when he competed in his first offshore powerboat race. After a career as a Financial Futures broker in the City of London, specialising in UK interest rate markets, he became actively involved in event organisation and powerboat racing journalism.
He served as Event Director for the Cowes–Torquay–Cowes races between 2010 and 2013. In 2016, he launched Powerboat Racing World, a digital platform providing global powerboat racing news and insights. The following year, he co-founded UKOPRA, helping to rejuvenate offshore racing in the United Kingdom. He sold Powerboat Racing World in late 2021 and remained actively involved with UKOPRA until 2025.
In September 2025, he established Powerboat News, returning to independent journalism with a focus on neutral and comprehensive coverage of the sport.
