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AI brief of an SEC Form 8-K · Cabot (CBT)

Cabot names Matthew Wood Reinforcement Materials president as Kalkstein retires

Neutral Impact 3 of 5 leadership Written later

Cabot Corporation said Executive Vice President and Reinforcement Materials President Hobart C. Kalkstein will step down from those roles effective June 15, 2025, and retire on January 5, 2026, and that Matthew Wood will succeed him as President, Reinforcement Materials Segment. Kalkstein has entered a transition agreement that extends the exercise period of his vested stock options and provides continued pay during a 12-month non-compete period, subject to conditions.

Key points

  • Hobart C. Kalkstein steps down as EVP and President, Reinforcement Materials Segment effective June 15, 2025, and retires January 5, 2026
  • Matthew Wood, previously VP of global marketing and strategy for Battery Materials, becomes Senior Vice President and President, Reinforcement Materials Segment
  • Transition agreement extends Kalkstein's vested option exercise period to the earlier of 36 months after termination or the original expiration date
  • Company will pay Kalkstein one-half of his base salary during the 12-month non-compete and non-solicitation period

The filing

CompanyCabot (CBT)
Form8-K, current report
Filed with the SECJun 3, 2025, 10:15 AM ET
Accession number0001193125-25-133898

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 1:38 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on June 03, 2025.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.