Not a resignation, but I believe still relevant.
Sergio Marchionne, Who Melded Chrysler and Fiat, Dies at 66
Mr. Marchionne was treated at Zurich’s University Hospital for complications after undergoing what Fiat Chrysler Automobiles said was a surgical procedure on his right shoulder in July. The health issues forced the company to unexpectedly remove him as CEO on Saturday, speeding up a departure planned for early 2019 after a decade at the helm of the Italian-American auto maker.
https://www.wsj.com/articles/sergio-marchionne-who-melded-chrysler-and-fiat-dies-at-age-66-1532512001