Rodney McMullen, the now-former CEO of supermarket giant Kroger who stepped down following an investigation into his personal conduct, had to forfeit $11.2 million in unvested stock and options, according to government filings.

Under his leadership, Kroger has positioned itself as a formidable competitor to Walmart, Amazon, and other grocery giants.

The conduct is not related to financial performance, operations or reporting, and it did not involve any Kroger associates, the company said.