Ubisoft co-founder Claude Guillemot dies in plane crash — French publisher established in 1986 became one of the biggest entertainment companies in the world

Ubisoft’s co-founder Claude Guillemot dies in plane crash in France

Claude Guillemot, Ubisoft co-founder since 1986, died in a Cessna 421 crash near La Baule on June 19, 2026. The loss raises succession concerns at a major software company, relevant to evaluating leadership risk in founder-led organizations.