It could be the case, but quite unlikely. As Buffett is a value investor, there's a very simple set of rules he follows that I recall learning from a similar-m

It could be the case, but quite unlikely. As Buffett is a value investor, there's a very simple set of rules he follows that I recall learning from a similar-minded portfolio manager: 1) set a price the company should be valued at 2) pay less than that price 3) don't be wrong So while Buffett's investment would be colossal and substantially raise the price of the company, all that investment says is that he thinks it is currently undervalued, and he likely isn't trying to throw enough money in Uber's direction to fix the entire pricing error, from a finance standpoint. There would actually likely be more damage caused if value investors publicly turned down investing in a pre-IPO company.