Summary
Updated Aug 30, 2026
John C. Vollmer is Director of Amentum Holdings, Inc. (AMTM). 2 SEC Form 4 filings on record going back to 2024, most recently on 10 February 2026.
Recent Transactions
2Every recent SEC Form 4 transaction John C. Vollmer has reported, most recent first.
Other Insiders Active in the Same Sector
No other insider has filed at John C. Vollmer's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Marc L. Andreessen - $106.20M of IOT open-market activity in the last 12 months
- Gary E. Dickerson - $104.79M of AMAT open-market activity in the last 12 months
- Tony Xu - $103.03M of DASH open-market activity in the last 12 months
- Bessemer Venture Partners VIII L.P. - $102.90M of TTAN open-market activity in the last 12 months
- Shyam Sankar - $102.03M of PLTR open-market activity in the last 12 months
- James Fu Bin Lu - $101.59M of GRND 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 John C. Vollmer?
John C. Vollmer is a corporate insider, tracked as Director of Amentum Holdings, Inc. (AMTM). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John C. Vollmer last file a Form 4?
The most recent primary Form 4 on record is dated 10 February 2026, one of 2 filings going back to 2024.
Where can I see all of John C. Vollmer'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.
Learn More
Follow John C. Vollmer and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
