CALLAHAN MICHAEL JOHN 4

What Happened

• Michael John Callahan, Rivian's Chief Administrative Officer, acquired 1,682 shares of Rivian Class A common stock on May 20, 2026. The shares were purchased under Rivian's 2021 Employee Stock Purchase Plan (ESPP) at $11.67 per share, for a total cost of $19,630. This was an employee purchase (acquisition), not a sale.

Key Details

• Transaction date: 2026-05-20 (report filed 2026-05-22).
• Transaction type/code: Acquisition under ESPP (Form 4 code A).
• Price and value: 1,682 shares at $11.67 each = $19,630 total.
• Purchase terms: Shares bought on the last business day of the offering period; price represented 85% of the closing price on 2026-05-20 (implied closing price ≈ $13.73).
• Rule/Exemption: Acquisition was reported as exempt under Rule 16b-3(c).
• Shares owned after transaction: Not specified in the filing.

Context

• ESPP purchases let employees buy company stock at a discount (here 15% off the closing price), a routine form of employee compensation and ownership rather than a directional trading signal. The filing appears timely (transaction on 5/20, Form 4 filed 5/22).