Summary
Updated Aug 31, 2026
William Hartzel is SVP, Bioservices of Emergent BioSolutions Inc. (EBS). 7 SEC Form 4 filings on record going back to 2024, most recently on 10 June 2026.
Recent Transactions
8Every recent SEC Form 4 transaction William Hartzel has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William Hartzel go back to 2024: 7 primary Form 4 filings, an average of 2.3 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 William Hartzel 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.
- Donald W. Degolyer - $318K of EBS open-market activity in the last 12 months
- Coleen Glessner - $306K of EBS open-market activity in the last 12 months
- Sujata Tyagi Dayal - $201K of EBS open-market activity in the last 12 months
- Kathryn C. Zoon - $144K of EBS open-market activity in the last 12 months
- Keith Katkin - $128K of EBS open-market activity in the last 12 months
- Paul Anthony Williams - $59K of EBS 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 Hartzel?
William Hartzel is a corporate insider, tracked as SVP, Bioservices of Emergent BioSolutions Inc. (EBS). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William Hartzel submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of William Hartzel'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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