> it would be company with the largest market cap in history, yes bigger than Apple
Apple is not remotely the largest company in history, when adjusted for inflation. The The Dutch East India Company, for instance, was worth over 7 trillion dollars at one point. Likewise, Standard Oil held a monopoly on all the USA's oil at one point and certainly had a several trillion dollar valuation.
Saudi Aramco will be massive, certainly. But not without precedent in history.