Athletic and sporting goods brand Under Armor just announced a big change as company founder Kevin Plank has returned to his role as CEO. He replaces Stephanie Linnartz after she spent approximately one year in the position.

“On behalf of the entire team, I want to thank Stephanie for her contributions to Under Armour. We deeply appreciate her hard work and dedication,” Plank said in a company statement. “Her previous experience in leading large brands was instrumental in focusing our consumer strategy, including the launch of the US loyalty program, UA Rewards. Her efforts have helped set us on the right path and we wish her good luck in her future endeavors.”

Linnartz will remain with the company as an advisor until April 30 before stepping down entirely, and Plank will assume his role as CEO beginning April 1.

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Linnartz did the dance in the retail industry in 2023 after 25 years in hospitality, was recently appointed as Global Chief Commercial Officer at Marriott. She was tapped for the role to help the struggling athletic apparel brand, which included a three-year plan to focus on women's apparel and sports and making changes to senior leadership.

“I am honored to have served as President & CEO of Under Armor and to have worked with so many incredible teammates who care deeply about the company's purpose and mission,” said Linnartz. “We have a strong foundation for future growth and the company's potential is limitless. I will continue to root for Under Armour's success.”

Shares of Under Armor tumbled on the announcement of Linnartz's departure, dropping nearly 12% in stock early Thursday, reportedly because of Plank's controversial past.

Plank resigned in 2020 after a bombshell Wall Street Journal The report revealed that he had sought business advice from MSNBC anchor Stephanie Ruhle, including flying her on private jets on the company's jet, and reportedly took her advice on the company's management team.

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Plank was replaced at the time by former Aldo Group CEO Patrik Frisk, who announced his resignation in May 2022.

Under Armor had one slow vacations quarter in 2023, with a 6% decline in North American revenue and a net income of $114.1 million in the quarter (compared to $121.6 million at the same time last year).

As of Thursday afternoon, Under Armor was still down nearly 11% in a 24-hour period.