PANews reported on October 4 that Michael Gronager, co-founder and CEO of blockchain analysis company Chainalysis, has left his leadership position after ten years in office.

A Chainalysis spokesperson confirmed that Gronager has been on “leave” since September 25 due to “personal issues.” It is unclear if or when Gronager plans to return. Chainalysis President and COO Sari Granat will serve as interim CEO, the spokesperson said.

Last October, Chainalysis laid off about 150 employees, or 15% of its 900-person workforce, as the company planned to exit the commercial market and focus on government contracting, which accounted for about 70% of its revenue at the time.