Women's fashion retailer Aritzia has filed for an IPO on the Toronto Stock Exchange, according to a regulatory document. Aritzia markets its apparel and accessories to Canadian women and has a growing retail presence in the US. It currently operates 75 retail stores and an online business. The company's PE backer Berkshire Partners as well as its founder and CEO Brian Hill will sell shares in the IPO. Aritzia has yet to designate an opening share price.