Strategic Portfolio Addition Glenn Greenberg (Trades, Portfolio)'s investment firm, Brave Warrior Advisors, has recently increased its investment in OneMain Holdings Inc (NYSE:OMF), a prominent player in the nonprime consumer finance sector in the United States. Following the trade, Brave Warrior Advisors holds a total of 6,416,800 shares in OneMain Holdings Inc, which represents 7.77% of the firm's portfolio and 5.36% of the company's outstanding shares. Glenn Greenberg (Trades, Portfolio)'s Investment Approach Glenn Greenberg (Trades, Portfolio), a notable figure in the investment community, co-founded Chieftain Capital Management in 1984 and later spearheaded Brave Warrior Advisors.