Summary
Updated Aug 31, 2026
Ellen Costello files SEC Form 4 reports at CITIGROUP INC (C). 2 SEC Form 4 filings on record going back to 2024, most recently on 6 January 2026.
Recent Transactions
4Every recent SEC Form 4 transaction Ellen Costello has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Ellen Costello go back to 2024: 2 primary Form 4 filings, an average of 0.7 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 Ellen Costello 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.
- Cantu Ernesto Torres - $7.48M of C open-market activity in the last 12 months
- Nicole Giles - $3.68M of C open-market activity in the last 12 months
- Pamela Habner - $3.49M of C open-market activity in the last 12 months
- Edward Skyler - $3.29M of C open-market activity in the last 12 months
- Gonzalo Luchetti - $2.30M of C open-market activity in the last 12 months
- Sunil Garg - $2.13M of C 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 Ellen Costello?
Ellen Costello is a corporate insider of CITIGROUP INC (C). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Ellen Costello last file a Form 4?
The most recent primary Form 4 on record is dated 6 January 2026, one of 2 filings going back to 2024.
Where can I see all of Ellen Costello'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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