As I understand it, when a company goes public, they sell off shares of their company on an exchange to investors. After the IPO is finished, the shares from then on are traded between third parties. That's to say, buyers and sellers just trade the shares between each other and the company isn't involved anymore. If that's the case (and if it's not, please correct me), how do companies benefit from their stock price going up? I'm sure they do benefit but I just don't know how. I can see why employees that own shares would benefit but I don't understand why the price would matter to the company if they have already sold the shares in the IPO. Thanks in advance.