Form4insider filings, from the source

Insider · CIK 0001435737

Sean D Keohane

Files at: CBT, CC. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $11.5M · 1net −$11.5M
$10k$10k$1M$1M$100M$100MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Aug 28, 2026 SForm 4 →Aug 31, 7:00 pm EDTCABOT CORPCBT134,895$85.00$11,466,075404,134−25.0%
Aug 28, 2026 MForm 4 →Aug 31, 7:00 pm EDTCABOT CORPCBT134,895$50.00$6,744,750539,029—

Reported trades — derivatives (options, RSUs, warrants)

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 11, 2026 AForm 4 →Sep 14, 5:00 pm EDTCABOT CORPCBT284$79.68$22,60048,115—
Aug 28, 2026 MForm 4 →Aug 31, 7:00 pm EDTCABOT CORPCBT134,895——0—