Cabot CEO Sean Keohane Exercises Options, Sells 91,923 Shares

What Happened

• Sean D. Keohane, President, CEO and Director of Cabot Corp (CBT), exercised options covering 91,923 shares and sold those 91,923 shares in an open‑market transaction on August 7, 2026. The reported exercise price was $62.24 per share (total exercise cost $5,721,288). The shares were sold at a weighted average price of $86.41 per share for total proceeds of $7,942,634.
• The filing shows both an option exercise (transaction code M) and an immediate market sale (S) of the resulting shares — a common cashless exercise/sale pattern where an insider exercises stock options and sells the shares the same day.

Key Details

• Transaction date: 2026-08-07. Form filed: 2026-08-11 (timely filed within the required period).
• Exercise: 91,923 shares at $62.24 = $5,721,288 (code M). Sale: 91,923 shares at weighted avg $86.41 = $7,942,634 (code S).
• Sale price range: $85.97 to $86.815 (footnote F1); reported sale price is a weighted average.
• Vesting: These 91,923 shares were subject to the option and vested over 2018–2020 (30% on 11/10/2018; 30% on 11/10/2019; 40% on 11/10/2020) (footnote F2).
• Shares owned after the transaction are not specified in the supplied Form 4 details.
• Transaction codes: M = option exercise/conversion; S = open‑market sale.

Context

• Because the exercise and sale occurred the same day, this effectively converts option value to cash for the insider rather than signaling a new long position; such transactions are often routine (liquidity/tax reasons) rather than a directional bet on the stock.
• The filing includes an additional M entry at $0.00 for 91,923 shares (reported as a derivative conversion); the footnote clarifies these shares were subject to a previously vested option. The filer has offered to provide a per‑trade breakdown on request (per footnote F1).