Leon Cooperman's Omega Advisors built out a monster stake in Rocket Companies in the final months of 2025. Cooperman bought more than $375 million worth of shares in the Detroit-based mortgage provider during the fourth quarter of last year, according to regulatory fillings . Rocket is now the fund's largest holding, valued at nearly $407 million, data from Insider Score shows. RKT 1Y mountain Rocket, 1-year Rocket shares were only marginally lower in the fourth quarter of 2025, but they managed to surge nearly 72% over the course of the year. While the stock is down 4% in 2026, analysts polled by LSEG see a rebound ahead. Though most have a hold rating, the average price target suggests more than 15% in upside. Cooperman more than doubled his stake in Occidental Petroleum , bringing it to more than $28 million. The Omega Family Office chair hiked his position in KBR by more than 20%, driving its worth above $85 million. But the billionaire investor zeroed out his ArriVent Biopharma holding. The Goldman Sachs alum also whittled down his positions in DiaMedica Therapeutics and OneMain Holdings by more than 38% and 16%, respectively.
