Equatorial Trust, associated with Rocket Lab CEO Peter Beck, sold 3.28 million shares between July 6 and July 8, 2026.
The transactions generated approximately $286.4 million in total proceeds.
A July 9 regulatory filing confirmed the sales followed a pre-scheduled Rule 10b5-1 trading plan adopted in March 2026.
Rocket Lab shares experienced a significant selloff this week following the disclosure of the insider sale.
The liquidation follows recent milestones, including a successful U.S. Space Force mission and an agreement to acquire Iridium Communications.