Summary
Updated Aug 30, 2026
Hobart Kalkstein is Executive Vice President of CABOT CORP (CBT). 4 SEC Form 4 filings on record, most recently on 17 December 2024. Most recent open-market trade: sold $965K of CBT on 13 November 2024. Lifetime open-market sales: $4.01M.
Recent Transactions
9Every recent SEC Form 4 transaction Hobart Kalkstein has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Hobart Kalkstein go back to 2024: 4 primary Form 4 filings, an average of 1.3 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Hobart Kalkstein files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Sean D. Keohane - $8.18M of CBT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Hobart Kalkstein?
Hobart Kalkstein is a corporate insider, tracked as Executive Vice President of CABOT CORP (CBT). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Hobart Kalkstein last file a Form 4?
The most recent primary Form 4 on record is dated 17 December 2024, one of 4 filings going back to 2024.
Has Hobart Kalkstein been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($4.01M) across all tracked filings.
Where can I see all of Hobart Kalkstein's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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