Bill Achtmeyer, Founder of The Parthenon Group, Joins Matters Graph as Chairman of Its Advisory Board

WASHINGTON, October 27, 2026–Bill Achtmeyer, founder of The Parthenon Group, has joined Matters Graph® as Chairman of its Advisory Board, working alongside Mark Stein and Jeff Merkle, who founded the firm in 2017. Matters Graph is a strategy consulting firm that serves private equity sponsors, private credit, and corporate development teams. It has deliberately limited its work to two things: commercial due diligence for buyers and commercial value creation for the businesses its clients own. I