ARK Invest bought 233,482 Rocket Lab shares across its ARK Innovation, ARK Autonomous Technology & Robotics and ARK Space & Defense Innovation ETFs, investing about $16.3 million in the latest disclosed trades. The purchase lifted ARK’s Rocket Lab buying since Sept. 22 to roughly 593,000 shares worth more than $41 million. Rocket Lab’s expanding order book includes $2.36 billion of backlog at the end of the second quarter, up 137% from a year earlier, and more than 100 contracted launches following Synspective’s 20-mission Electron agreement. ARK also sold about $3.95 million of Palantir shares through ARKQ and ARKX. Rocket Lab is a significant holding in ARKX, representing about 6.07% of that portfolio, while the company develops the reusable medium-lift Neutron rocket for larger missions.