According to Reuters, the most notable event during her time as CEO was the 2019 takeover of Anadarko Petroleum. The deal was controversial and led to investor concerns, followed by years of reducing debt, selling assets, and focusing the company's operations. Under her leadership, Occidental $OXY shifted more toward oil and gas, highlighted by the $12 billion CrownRock shale purchase in 2024 and the recent $9.7 billion sale of its chemicals business.
"Following the recently completed decade-long transformation of the company, we now have the best portfolio and the best technical expertise in Occidental's history," Hollub said in a statement. "With this strong foundation in place, a clear path forward and a leader like Richard, who has the experience and vision to elevate Occidental, now is the right time for this transition."