Shake Shack Inc. (NYSE: SHAK) announced the appointment of Michelle Hook as chief financial officer, effective May 11, 2026. Hook will lead financial operations including accounting, treasury, financial planning, tax, investor relations and external reporting.

Hook brings more than 20 years of financial and operational experience in the restaurant industry. She joins from Portillo's, where she served as CFO beginning in December 2020. At Portillo's, she led finance, supply chain and information technology, helped take the company public in 2021, and built processes to support growth.

Previously, Hook spent more than 17 years at Domino's Pizza Inc., where she most recently served as vice president of finance for global financial planning and analysis and investor relations. She also held various accounting and finance leadership positions at the company. Earlier in her career, she worked at Arthur Andersen and held finance roles at Holcim.

Hook holds an MBA from the University of Michigan and a bachelor's degree in accounting from Michigan State University. She is a certified public accountant.

"We are thrilled to welcome Michelle to the Shake Shack team," said Rob Lynch, chief executive officer of Shake Shack. "She brings deep restaurant industry expertise and significant public company experience to the role."

Lynch noted that Hook will contribute to the company's goal of reaching 1,500 company-operated locations. The appointment follows the company's continued expansion, with over 685 locations system-wide including more than 440 in 35 U.S. states and over 245 international locations.