Four firms on both sides of the border are helping Dennis “Chip” Wilson, the billionaire founder of yoga apparel retailer Lululemon Athletica, sell half of his 27.7 percent stake in the company to Boston-based private equity firm Advent International for $845 million.

The move announced late last week averts a potential proxy fight at Lululemon and comes nine months after Wilson made controversial comments about the body size of the Vancouver-based company’s predominantly female customers.