Rocket Lab USA, Inc. (RKLB) plummeted 8.94% during intraday trading on Tuesday, deepening its extended downtrend as investors continued to digest the impact of CEO Peter Beck's large-scale share reduction.

The sell-off was primarily driven by Beck's sale of approximately 2.8 million shares between July 6-8 under a pre-arranged 10b5-1 trading plan, with prior filings indicating intent to sell up to 5 million shares valued at roughly $465 million. The sustained liquidation by core management has significantly eroded investor confidence, overshadowing positive catalysts including a $266 million US Space Force missile defense contract for 12 HASTE suborbital launches and the $8 billion Iridium Communications acquisition.

Broader market weakness further pressured the stock, with the Philadelphia Semiconductor Index declining over 2% on the session, dampening risk appetite across the sector. Rocket Lab has now fallen over 50% since late May, remaining in a pronounced downtrend despite the recent contract wins.