Overview
- Alex Cimo, known online as Cimoooooooo, died on Wednesday, June 3, 2026, his mother wrote in a now-deleted LinkedIn post that was later reported by multiple outlets.
- Cimo built a global YouTube audience of more than 300,000 subscribers with deck guides, competitive analysis and a 100-plus-episode 'Masochist' Master Duel series that last posted on March 20, 2026.
- He publicly documented a multi-year battle with Stage IV colon cancer, regularly updating fans about treatment and prognosis while fundraising for cancer-related causes.
- His mother said he raised tens of thousands of dollars for the Crohn's and Colitis Foundation and volunteered his time toward finding a cure, a detail echoed in community coverage.
- Fellow creators have posted tributes and commemorative videos, his wife said she had planned a later announcement and a video meant to reveal his condition was not uploaded before news of his death spread.