Summary
Updated Aug 31, 2026
Donald E. Gibson is President and CEO, Director of GREENE COUNTY BANCORP INC (GCBC). 2 SEC Form 4 filings on record, most recently on 30 October 2025. Most recent open-market trade: bought $11K of GCBC on 30 October 2025. Lifetime open-market purchases: $22K.
Recent Transactions
4Every recent SEC Form 4 transaction Donald E. Gibson has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Donald E. Gibson go back to 2025: 2 primary Form 4 filings, an average of 1.0 per year. The typical open-market purchase is $11K (2 buys totaling $22K). The largest single buy on record is $11K of GCBC in 2025. 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 Donald E. Gibson 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.
- Michelle M. Plummer - $288K of GCBC open-market activity in the last 12 months
- Tejraj S. Hada - $268K of GCBC open-market activity in the last 12 months
- John Brust - $100K of GCBC open-market activity in the last 12 months
- Jay P. Cahalan - $98K of GCBC open-market activity in the last 12 months
- Peter W. Hogan - $66K of GCBC open-market activity in the last 12 months
- Christopher Cannucciari - $54K of GCBC 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 Donald E. Gibson?
Donald E. Gibson is a corporate insider, tracked as President and CEO, Director of GREENE COUNTY BANCORP INC (GCBC). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Donald E. Gibson last file a Form 4?
The most recent primary Form 4 on record is dated 30 October 2025, one of 2 filings going back to 2025.
Has Donald E. Gibson been buying or selling stock?
Recorded transactions: 2 open-market purchases ($22K) and 0 open-market sales across all tracked filings.
Where can I see all of Donald E. Gibson'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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