#SpaceXInitiatesIPORoadshowWith555MShares means SpaceX is starting its IPO roadshow by offering 555 million shares to investors. A roadshow is when a company travels around pitching its story to big investors to build excitement before listing on the stock market. By putting 555M shares on the table, SpaceX is basically saying “here’s how much ownership is up for sale” as it gets ready to go public, and the response from investors during this tour will help set the final price and demand for the shares.