SEC Form 4
Cabot Corporation (CBT) insider trading
In the 12 months to Oct 23, 2026, one CBT insider reported open-market sales of $19.6M across 3 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $19.6M
- 3 filings · 1 insider
- Open-market purchases
- $0
- 0 filings
Who traded CBT, and when
- Sale
CBT daily close from Oct 23, 2025 to Oct 23, 2026, between $58.71 and $93.40, last $73.79. 3 sale and 0 purchase filings by 1 insider, marked at their filing dates. Sean D. Keohane, President and CEO: sold $19.6M across 3 filings, first filed Aug 11, 2026, last Aug 31, 2026.
Largest mark · tap a row for others
Sean D. Keohane · President and CEO
Filing 1 of 2 within a week · $11,703,680 total
Sale $237,605
2,779 shares at $85.50 avg
Filed Aug 26, 2026 · traded Aug 24
Close on filing date $84.58
Sean D. Keohane · President and CEO
President and CEO
$19.6M soldHas the Cabot Corporation's CEO sold stock?
Yes. Sean D. Keohane (CEO) sold 229,597 shares ($19.6M) in Aug 2026.
Open-market trades
3 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Sean D. Keohane | President and CEO | $19.6M | — | 3 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Sean D. Keohane President and CEO | Sale | 134,895 | $85.00 | $11.5M | 404,134 | |
traded | Sean D. Keohane President and CEO | Sale | 2,779 | $85.50 | $237.6K | 288,873 | |
traded | Sean D. Keohane President and CEO | Sale | 91,923 | $86.41 | $7.9M | 404,134 |
GET /stocks/filings/vX/form-4?tickers=CBT&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"CBT"
],
"issuer_cik": "0000016040",
"owner_cik": "0001435737",
"accession_number": "0001193125-26-377202",
"form_type": "4",
"filing_date": "2026-08-31",
"period_of_report": "2026-08-28",
"issuer_name": "CABOT CORP",
"issuer_trading_symbol": "CBT",
"owner_name": "Keohane Sean D",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President and CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-28",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 134895,
"transaction_price_per_share": 85,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 404134,
"transaction_value": 11466075,
"direct_or_indirect": "D"
},
{
"tickers": [
"CBT"
],
"issuer_cik": "0000016040",
"owner_cik": "0001435737",
"accession_number": "0001193125-26-367204",
"form_type": "4",
"filing_date": "2026-08-26",
"period_of_report": "2026-08-24",
"issuer_name": "CABOT CORP",
"issuer_trading_symbol": "CBT",
"owner_name": "Keohane Sean D",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President and CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-24",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2779,
"transaction_price_per_share": 85.5,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 288873,
"transaction_value": 237604.5,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 37 records
- Option exercises3 records
- Tax withholding12 records
- Grants and awards22 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for CBT every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.