Summary
Updated Aug 30, 2026
Ellen H. Masterson is Director of INSPERITY, INC. (NSP). 6 SEC Form 4 filings on record going back to 2025, most recently on 20 May 2026. Most recent open-market trade: bought $24K of NSP on 11 March 2026. Lifetime open-market purchases: $46K.
Recent Transactions
6Every recent SEC Form 4 transaction Ellen H. Masterson has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Ellen H. Masterson 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.
- Paul J. Sarvadi - $16.06M of NSP open-market activity in the last 12 months
- Susan M. Byrne - $1.38M of WHG open-market activity in the last 12 months
- Brian O. Casey - $316K of WHG open-market activity in the last 12 months
- James D. Allison - $205K of NSP open-market activity in the last 12 months
- Adrian Helfert - $175K of WHG open-market activity in the last 12 months
- Randall Mehl - $102K of NSP 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 H. Masterson?
Ellen H. Masterson is a corporate insider, tracked as Director of INSPERITY, INC. (NSP). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Ellen H. Masterson last file a Form 4?
The most recent primary Form 4 on record is dated 20 May 2026, one of 6 filings going back to 2025.
Has Ellen H. Masterson been buying or selling stock?
Recorded transactions: 2 open-market purchases ($46K) and 0 open-market sales across all tracked filings.
Where can I see all of Ellen H. Masterson'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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