Cabot Corp (CBT) CEO Sean Keohane Exercises Options, Sells 134,895 Shares

What Happened
Sean D. Keohane, President and CEO of Cabot Corp (CBT), exercised stock options covering 134,895 shares and sold those 134,895 shares in an open-market transaction on August 28, 2026. He paid $50.00 per share to exercise (total exercise cost $6,744,750) and sold the shares at $85.00 per share for total proceeds of $11,466,075. The filing also records the derivative (the option) as disposed in conversion to common stock.

Key Details

• Transaction dates: August 28, 2026 (exercise and sale). Form 4 filed August 31, 2026 (reporting period: Aug 28, 2026). No late filing indicated in the provided data.
• Prices and amounts: Exercised 134,895 shares at $50.00/share (exercise cost $6,744,750); sold 134,895 shares at $85.00/share (proceeds $11,466,075).
• Transaction codes: M = exercise/conversion of derivative; S = sale of shares. The sequence indicates a cashless-style exercise and immediate sale.
• Shares owned after transaction: Not specified in the provided filing details.
• Footnote: The option originally covered 137,674 shares and vested over a three-year schedule (30% on Nov 9, 2019; 30% on Nov 9, 2020; 40% on Nov 9, 2021).

Context
Because the exercised shares were sold the same day, this is effectively a cashless exercise — the option was converted into stock and those shares were immediately sold in the open market. Such transactions are commonly used by insiders to cover the exercise cost and taxes; they are routine liquidity events rather than direct buy-side endorsements. The filing’s separate derivative-disposition line (showing $0) simply reflects that the option was converted into shares.