YouTube/lululemon
He recently wrote an open letter to shareholders since he wasn't permitted to speak out the board meeting, saying that the company has "lost its way."
He said that Lululemon "cannot continue to cede the market opportunity we created to Under Armour and Nike."
Meanwhile, Wilson said to Business Insider that he's been profiting fromUnder Armour and Nike's success.
"Here's a fact I think is unbelievable and it's sad for everybody except for me and Nike and Under Armour," he said in a phone interview with Business Insider. "I've all made all my money in the last 2 years betting on Nike and Under Armour stock because I haven't been able to trade Lululemon." He sold 50% of his Lululemon shares about two years ago, he said.
In his letter, he had wrote that "Under Armour has taken our leadership role, and the market recognizes this with a premium valuation."
Under Armour's CEO Kevin Plank has said that he plans to double the company's women's sector, which would thereby trump Lululemon.
"Kevin has put out a vision again," Wilson said. "He's seeing into the future he knows how big the market place is and they seem to be putting down the building blocks to take advantage of it where, Lululemon again, is just building out more store, building out e-commerce."
In his letter, he pointed out how since Lululemon's CEO Laurent Potdevin took hold in 2013, Under Armour's stock has increased 79%, Nike's has increased by 45%, and Lululemon has decreased by 8%.
He said to Business Insider that Nike is "pushing technology," specifically with its Olympic apparel.
"I think, you know Under Armour's in the middle because I think they push technology but they've got a wholesale model where their customers wont pay for it, but it's good marketing," he said.