Group 1 - Occidental Petroleum (NYSE: OXY) is a significant player in the US energy sector and is also a holding of Berkshire Hathaway, which enhances its market position [1] - The article is authored by two consultants specializing in corporate finance and M&A analysis, focusing on US-listed companies across various sectors [1] - The research combines fundamental and technical analysis, emphasizing medium to long-term investment strategies [1]