Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies John Richard Stamm 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.
- Jeffrey Westphal - $5.12M in VERX purchases and sales in the last 12 months
- Christopher David Young - $731K in VERX purchases and sales in the last 12 months
- Eric C. Andersen - $516K in VERX purchases and sales in the last 12 months
- ITEM SECOND IRR. TRUST FBO KYLE R. WESTPHAL u/a of JEFFREY R. WESTPHAL dated October 5, 2001 - $150K in VERX purchases and sales in the last 12 months
- David Destefano - $82K in VERX purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is John Richard Stamm?
John Richard Stamm is a corporate insider of Vertex, Inc. (VERX). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John Richard Stamm last file a Form 4?
The most recent primary Form 4 on record is dated 12 June 2026, one of 3 filings going back to 2024.
Has John Richard Stamm been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($349K) across all tracked filings.
