SCHEDULE 13D/A

Rakuten Mobile, Inc. and related entities holding 26,080,155 shares (8.9% of AST SpaceMobile's Class A Common Stock) entered into a trading plan on April 14, 2026 to sell up to 15,510,077 shares, representing approximately 5.3% of outstanding shares or roughly half of Rakuten's total holdings, through BofA Securities in open market transactions. As of mid-April 2026, Rakuten had already sold approximately 4.94 million shares across three trading days at average prices ranging from $86.22 to $91.42 per share, with founder and CEO Hiroshi Mikitani resigning from AST's Board effective January 13, 2026.