The current institutional shareholding score of Occidental Petroleum Corp is 5.00, ranking 44 out of 120 in the Oil & Gas industry. The latest institutional shareholding proportion is 51.80%, representing a quarter-over-quarter increase of 1.26%. The largest institutional shareholder is Warren Buffett, holding a total of 302.69M shares, representing 26.73% of shares outstanding, with 0.35% increase in holdings.