Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Halley E. Gilbert 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.
- Todd Watanabe - $4.44M in ARQT purchases and sales in the last 12 months
- Grant Pickering - $3.63M in PCVX purchases and sales in the last 12 months
- Jim Wassil - $3.12M in PCVX purchases and sales in the last 12 months
- Masaru Matsuda - $2.21M in ARQT purchases and sales in the last 12 months
- Elvia Cowan - $2.08M in PCVX purchases and sales in the last 12 months
- Howard G. Welgus - $1.95M in ARQT purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Halley E. Gilbert?
Halley E. Gilbert is a corporate insider of CytomX Therapeutics, Inc. (CTMX). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Halley E. Gilbert last file a Form 4?
The most recent primary Form 4 on record is dated 22 June 2026, one of 4 filings going back to 2025.
Has Halley E. Gilbert been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($455K) across all tracked filings.
