Holt began the 2014–15 season by advancing to the final of the Yixing Open, but he was beaten 4–2 by Ding Junhui. He eliminated Rory McLeod and Sam Baird at the Wuxi Classic, before losing 5–1 to Neil Robertson in the last 16. A second last 16 ranking event appearance followed at the Shanghai Masters after Holt overcame Ricky Walden 5–2, but he was ousted by reigning world champion Mark Selby 5–2. Holt made a 138 break during his 6–1 victory over Zak Surety in the opening round of the UK Championship, before losing 6–3 to Dechawat Poomjaeng. He lost his first six ranking matches in 2015, but qualified for the PTC Grand Final by finishing sixth on the Asian Order of Merit. There, Holt defeated Jimmy Robertson 4–2 and held on against Stephen Maguire to win 4–3 having been 3–0 up. In his only quarter-final in a ranking event this season, Holt was knocked out 4–1 by Joe Perry. Holt played Ronnie O'Sullivan in the opening round of the World Grand Prix and he made breaks of 88 and 119 in going 3–0 up. O'Sullivan responded to make it 3–3, before a 76 from Holt saw him advance to the second round, where he was knocked out 4–2 by Liang Wenbo. In the first round of the World Championship he scored his first win at the Crucible for 11 years by beating 2010 winner Neil Robertson 10–6. In the second round Holt lost 13–8 to Mark Williams, but hoped the defeat would be a turning point in his career and that next year he would arrive at the tournament as a ranking event winner.