Siddharth Jagadeesh is a Singaporean chess grandmaster, and the youngest player in Singapore's history to earn the title, completing it at seventeen.

In March 2024 he tied for first at the La Roda Open with Aravindh Chithambaram and Carlos Daniel Albornoz Cabrera, taking second on tiebreaks. Two months later he scored his final Grandmaster norm at the Sharjah Masters, beating Andrey Esipenko in the eighth round to seal the title.