Claude Guillemot, 69, who co-founded Ubisoft with his brothers in 1986 and served as chairman of Guillemot Corp, died on June 20, 2026, in a plane crash near La Baule on France's Atlantic coast, Reuters and Bloomberg reported.

A flight instructor was also aboard the aircraft at the time of the crash. The La Baule area had been designated to host an air show that weekend, according to Reuters. Details on the cause of the crash had not been publicly confirmed as of the most recent sourced reports.

Guillemot was one of five brothers who founded Ubisoft in Carentoir, Brittany — a family enterprise that grew from a small French software distributor into one of the largest independent video game publishers in the world. The company is best known globally for the Assassin's Creed franchise, AP News notes, alongside other major IPs including Far Cry, Rainbow Six, and Watch Dogs.

The Guillemot family's construction of Ubisoft across four decades tracks closely with the arc of the commercial games industry itself — from the late-1980s era of floppy-disk distribution and small development studios through the CD-ROM transition, the rise of console publishing, and eventually the shift toward live-service and open-world titles. Claude Guillemot's role at Guillemot Corp, the family holding vehicle, kept him at the center of that corporate structure even as his brother Yves Guillemot took the CEO role at Ubisoft and became the public face of the company.

The timing of his death arrives at a complicated moment for Ubisoft as an enterprise. The company has faced sustained pressure over the past two years — weak sales, franchise fatigue concerns, and a prolonged strategic review that drew acquisition speculation, including reported interest from Tencent and members of the Guillemot family itself in taking the company private. Claude Guillemot, through his position at Guillemot Corp, was a direct stakeholder in those deliberations. The New York Times confirmed both his death date and his co-founder status.

Worth flagging: the Guillemot family's dual role as founders, operational executives, and controlling shareholders has always made Ubisoft's governance structure unusual by the standards of publicly traded games companies. With Claude Guillemot gone, the distribution of influence within the family holding structure will draw scrutiny — particularly given the unresolved questions around the company's strategic direction. That scrutiny is not yet supported by any sourced reporting on governance changes; it is a structural observation based on how Guillemot Corp has historically functioned.

What is documented is the scale of what the brothers built. Ubisoft today employs tens of thousands of people across studios on multiple continents. The Assassin's Creed series alone has sold over 200 million copies across its lifetime — a commercial and cultural footprint that traces back directly to the founding bet made in rural Brittany nearly 40 years ago. Claude Guillemot was part of that founding group from the start.