Born in London, Ticktum began competitive kart racing aged eight in 2007. He won several national titles, including the British Formula Kart Stars Championship in 2011. In 2013, Ticktum joined Ricky Flynn Motorsport, finishing second in the European Championship and winning the KFJ Andrea Margutti Trophy. He graduated to junior formulae in 2015, debuting in MSA Formula with Fortec Motorsport. Ticktum received a two-year ban from motorsport for intentionally crashing into a rival under safety car conditions at Silverstone.
Ticktum returned to motorsport in 2016, competing in the final round of the FIA European Formula 3 Championship with Carlin. He became a member of the Red Bull Junior Team in January 2017. That year, he won the McLaren Autosport BRDC Award and the Macau Grand Prix with Team Motopark. Ticktum won the Macau Grand Prix again in 2018, becoming the third driver to win the race in consecutive years. He also finished runner-up in the 2018 FIA Formula 3 European Championship with Team Motopark.
After a brief Super Formula stint with Team Mugen in 2019, Ticktum left Red Bull and joined the Williams Driver Academy, where he remained until 2021. He raced in FIA Formula 2 from 2020 to 2021. In 2020, he competed with DAMS and secured his first Formula 2 victory at Silverstone. In 2021, Ticktum switched to Carlin and achieved two wins, including one at Monaco and another in Sochi, finishing fourth in the drivers' standings.
Ticktum moved to Formula E for the 2021–22 season, joining the NIO 333 FE Team. He scored his first point in Formula E in Rome. For the 2022–23 season, he continued with NIO, now alongside Sérgio Sette Câmara. He achieved a sixth-place finish in Cape Town. In the 2023–24 season, the team rebranded as ERT Formula E Team, and Ticktum secured a career-best fourth place at the Misano ePrix. For the 2024–25 season, the team rebranded again to Cupra Kiro. Ticktum claimed his maiden Formula E victory at the Jakarta ePrix in his 60th start, which was also the Kiro team's first win in its modern iteration. He finished 11th in the drivers' standings, helping Porsche win the manufacturers' title.
Ticktum has gained a following of over twelve thousand followers on streaming-platform Twitch, where he plays Call of Duty. He is known for his outspoken nature. During his successful fourth season in Formula E, Ticktum was described as having become a more composed and refined character, partly due to working with mental optimisation coach Gerry Convy.
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