Summary
Updated Aug 31, 2026
Jeffrey William Henderson is Director of HALOZYME THERAPEUTICS, INC. (HALO). 7 SEC Form 4 filings on record going back to 2025, most recently on 7 May 2026. Most recent open-market trade: sold $12K of HALO on 28 April 2025. Lifetime open-market sales: $304K.
Recent Transactions
9Every recent SEC Form 4 transaction Jeffrey William Henderson has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Jeffrey William Henderson go back to 2025: 7 primary Form 4 filings, an average of 3.5 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 Jeffrey William Henderson 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.
- Helen Torley - $37.86M of HALO open-market activity in the last 12 months
- Cristiano R. Amon - $28.48M of QCOM open-market activity in the last 12 months
- Akash J. Palkhiwala - $5.47M of QCOM open-market activity in the last 12 months
- Cortney Caudill - $1.96M of HALO open-market activity in the last 12 months
- Heather S. Ace - $1.75M of QCOM open-market activity in the last 12 months
- Nicole Labrosse - $1.69M of HALO 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 Jeffrey William Henderson?
Jeffrey William Henderson is a corporate insider, tracked as Director of HALOZYME THERAPEUTICS, INC. (HALO). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Jeffrey William Henderson last file a Form 4?
The most recent primary Form 4 on record is dated 7 May 2026, one of 7 filings going back to 2025.
Has Jeffrey William Henderson been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($304K) across all tracked filings.
Where can I see all of Jeffrey William Henderson'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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