Rivian Interim CFO Derek B. Mulvey Reports Initial Holdings in Form 3 Filing

Executive Summary

On October 30, 2026, Derek B. Mulvey, serving as Interim CFO of Rivian Automotive, Inc. (ticker: RIVN), filed an initial Form 3 statement of beneficial ownership with the SEC. The filing reports direct ownership of 296,200 shares of Class A Common Stock.

Breakdown of Holdings

According to footnote disclosure (F1), the 296,200 reported shares comprise:

• 73,057 shares resulting from previously vested Restricted Stock Units (RSUs).
• 1,798 shares acquired through the Issuer's 2021 Employee Stock Purchase Plan (ESPP).
• 2,490 shares acquired via the Issuer's Directed Share Program during its IPO.
• 218,855 unvested RSUs scheduled to vest across multiple quarterly anniversaries through August 2027.

Analysis and Significance

As an initial Form 3 filing following an appointment to an executive officer role (Interim CFO), there are no open-market buy or sell transactions. The filing establishes a baseline equity ownership position reflecting existing accumulated compensation and participation plans. Trading significance is assessed as Medium due to the executive role and material equity alignment.