Rocket Lab Director Nina Armagno Sells ~$577K in Common Stock Under Rule 10b5-1 Plan

Executive Summary

On November 2, 2026, Rocket Lab Corp ($RKLB) Director Nina Armagno executed a series of open-market sales totaling 10,926 shares of Common Stock at weighted-average prices ranging between $51.31 and $55.01 per share. The aggregate transaction value was approximately $576,697. Following the transactions, Armagno directly holds 100,496 shares.

Transaction Breakdown

The transactions were executed in five tranches on November 2, 2026:

• Tranche 1: 4,026 shares sold at a weighted average price of $51.3092 (range: $50.79 to $51.78)
• Tranche 2: 1,500 shares sold at a weighted average price of $52.6306 (range: $51.89 to $52.88)
• Tranche 3: 3,000 shares sold at a weighted average price of $53.5520 (range: $52.97 to $53.88)
• Tranche 4: 2,300 shares sold at a weighted average price of $54.3361 (range: $54.01 to $54.77)
• Tranche 5: 100 shares sold at $55.0100

Trading Plan & Market Context

As indicated in the footnotes, the sales were conducted pursuant to a pre-arranged Rule 10b5-1 trading plan established on September 19, 2025. Because these sales were executed under an automated plan and represented less than 10% of the insider's total equity holdings, this filing is classified as having low market and trading significance.