I mean, SpaceX is great and all, but it's no Cargill or even in the same league as Cargill or other similar companies like Koch (which is #2 in the US):
https://en.wikipedia.org/wiki/Cargill
Revenue: US$109.6 billion (2017)[1]
Net income: US$2.835 billion (2017)[1]
Total assets: US$55.8 billion
25% of all United States grain exports
22% of the US domestic meat market