RKLB, ASTS, TDG: Insiders are Selling These 3 Space Stocks

Group 1 - Recent insider selling activity has been observed among notable space stocks, particularly Rocket Lab (RKLB) and AST SpaceMobile (ASTS), along with Transdigm (TDG) [2] - Rocket Lab's CEO, Peter Beck, sold over $141 million worth of shares in December, contributing to a stock surge of approximately 177% in 2025 [3] - The Lead Independent Director of Rocket Lab, Merline Saintil, also sold shares totaling around $1.7 million, with a portion of her sales not conducted under a predetermined plan [4] Group 2 - The insider selling at Rocket Lab is less alarming due to the majority of sales being executed through a 10b5-1 plan, which mitigates immediate bearish signals [5][7] - AST SpaceMobile's shares have increased by over 250% in 2025, but American Tower, a major shareholder, recently sold nearly $160 million worth of shares without a predetermined plan, raising concerns [6][7] - Transdigm's insider selling, while significant, is limited to one director, making it a modest bearish indicator [7]