Connor Olev Martin O'Brien (born 4 February 1961) is a Canadian investment-fund manager.
He is president and chief executive officer of O'Shares Investments, a U.S.-based ETF adviser, as well as president, chief executive officer and chief investment officer of Stanton Asset Management, a Montreal-based investment-management company, which he founded in 2002.
O'Brien had previously established a private-equity investment firm, Stanton Capital Corporation, in New York City.
Before establishing his own businesses, he held positions at Merrill Lynch and Lehman Brothers.O'Brien is a former alpine skier who represented the United Kingdom in the 1984 Winter Olympics in Sarajevo and Estonia in the 1994 Winter Olympics in Lillehammer.