SpaceX has experienced a decline of $400 billion in market value following a reversal of its initial public offering rally. This significant drop reflects investor concerns and market volatility surrounding the company.

SpaceX designs, manufactures and launches advanced rockets and spacecraft.

SpaceX filed confidentially for an IPO on April 1, 2026, aiming for a valuation of $1.75 trillion with a potential listing in June. If successful, this would mark the largest IPO in history.

IBM's 4 Pi aerospace computers were integral to the Space Shuttle's first flight on April 12, 1981, managing critical systems below the crew deck. A fifth computer was available as a backup in case of a catastrophic failure of the primary systems.