Summary
Updated Aug 31, 2026
William Gassen is Director of Oscar Health, Inc. (OSCR). 6 SEC Form 4 filings on record going back to 2025, most recently on 13 July 2026.
Recent Transactions
2Every recent SEC Form 4 transaction William Gassen has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William Gassen go back to 2025: 6 primary Form 4 filings, an average of 3.0 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 William Gassen 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.
- Mark T. Bertolini - $82.60M of OSCR open-market activity in the last 12 months
- Mario Schlosser - $46.37M of OSCR open-market activity in the last 12 months
- Richard Scott Blackley - $7.03M of OSCR open-market activity in the last 12 months
- Delano Ladd - $1.53M of HQY open-market activity in the last 12 months
- Michael Henry Fiore - $914K of HQY open-market activity in the last 12 months
- Adrian T. Dillon - $798K of HQY 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 William Gassen?
William Gassen is a corporate insider, tracked as Director of Oscar Health, Inc. (OSCR). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William Gassen submitted recently?
3 primary Form 4 filings in the last 90 days, covering 2 companies.
Where can I see all of William Gassen'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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