SpaceX filed for its long-awaited initial public offering on Wednesday evening, bringing Elon Musk's rocket, satellite and artificial intelligence company closer to what could be the largest IPO in market history.The company is expected to list on Nasdaq under the ticker SPCX, with Reuters reporting that SpaceX could begin its roadshow on June 4, price the offering as soon as June 11, and start trading as early as June 12, according to Yahoo Finance and Reuters.

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