Is Koch Industries a Fortune 500 company?

Hello, the topic refers to Koch Industries, which is KOCH in the United States. It is a comprehensive petrochemical enterprise run by brothers Charles and David. The company is named after its surname. It is now the largest private company in the world. holding company. But the current ranking of the world's top 500 companies does not seem to include it. According to its annual sales of almost 100 billion US dollars, it must be a top 500 company (after all, Huawei's 2016 sales of 85 billion US dollars ranked very high. The reason is that Koch Industries is not a listed company, and the company is very mysterious. Its sales can only be roughly estimated, and there are no specific financial statements, making it difficult to determine its specific ranking. The Koch brothers have great influence in the United States and the political arena. Trump once ridiculed his rivals in the party for rushing to California to "pilgrimage" to the Koch brothers to gain their support. Of course, because of some of their brothers’ political views that cannot be recognized by mainstream society (such as inheritance tax, global warming, pollution control, small government, liberalism), they are somewhat demonized in the United States.