Rocket Lab Officer Adam C. Spice Files Form 144 for $9.77M Share Sale

Executive Summary

On October 1, 2026, Rocket Lab Corp (RKLB) officer Adam C. Spice submitted a Form 144 notice disclosing an intention to sell up to 140,157 shares of common stock through Morgan Stanley Smith Barney LLC. The proposed disposition represents an aggregate market value of approximately $9.77 million ($69.68 per share).

Transaction Details

• Security: Common Stock
• Shares to be Sold: 140,157
• Estimated Value: $9,766,139.76
• Acquisition Route: Acquired via cash exercise of stock options from the issuer on October 1, 2026.
• Planned Sale Date: October 1, 2026
• Trading Plan: Executed pursuant to a Rule 10b5-1 pre-scheduled trading plan adopted on June 3, 2026.

Recent Trading Context (Past 3 Months)

The insider has engaged in previous sales under Rule 10b5-1 or direct transactions:

• September 2, 2026: 140,157 shares for gross proceeds of $8,777,724.56.
• August 24, 2026: 9,677 shares for gross proceeds of $673,790.46.
• August 18, 2026: 30,908 shares for gross proceeds of $2,484,247.50.
• August 17, 2026: 15,718 shares for gross proceeds of $1,291,812.12.

Market Impact & Significance

This filing carries Medium significance. Although the dollar figure (~$9.77M) is sizeable, the shares represent only ~0.02% of the company's 598,350,482 outstanding shares. Furthermore, the transaction stems from an option exercise governed by a pre-arranged Rule 10b5-1 plan established in June 2026, indicating routine executive compensation liquidity rather than discretionary market timing.