Summary
Updated Aug 30, 2026
William Jack Plants II is Chief Financial Officer of FINANCIAL INSTITUTIONS INC (FISI). 4 SEC Form 4 filings on record going back to 2024, most recently on 23 March 2026. Most recent open-market trade: bought $20K of FISI on 12 March 2026. Lifetime open-market purchases: $90K.
Recent Transactions
4Every recent SEC Form 4 transaction William Jack Plants II has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William Jack Plants II go back to 2024: 4 primary Form 4 filings, an average of 1.3 per year. The typical open-market purchase is $45K (2 buys totaling $90K). The largest single buy on record is $70K of FISI in 2024. 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 have reported open-market trades at the same companies as William Jack Plants II. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Robert N. Latella - $100K of FISI open-market activity on record
- Martin Kearney Birmingham - $100K of FISI open-market activity on record
- Samuel M. Gullo - $100K of FISI open-market activity on record
- Robert M. Glaser - $100K of FISI open-market activity on record
- Mark Zupan - $50K of FISI open-market activity on record
- Andrew W. Dorn Jr. - $50K of FISI open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William Jack Plants II?
William Jack Plants II is a corporate insider, tracked as Chief Financial Officer of FINANCIAL INSTITUTIONS INC (FISI). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did William Jack Plants II last file a Form 4?
The most recent primary Form 4 on record is dated 23 March 2026, one of 4 filings going back to 2024.
Has William Jack Plants II been buying or selling stock?
Recorded transactions: 2 open-market purchases ($90K) and 0 open-market sales across all tracked filings.
Where can I see all of William Jack Plants II'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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