John C. Vollmer
CIK 1723342 · Group President, MS · last filed 2026-02-10
John C. Vollmer is a Group President, MS who has filed 10 SEC Form 4 insider transactions across 2 companies since 2017. The most recent filing, for AMTMw, was dated Feb 10, 2026. Across all open-market trades the lifetime net is −$1.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.7M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$2.69M
2
10
-$1.31M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| Amentum Holdings, Inc. (AMTMw) Delisted | Director | 424,780 | — | — | $0 | 4 | 2026-02-10 |
| ACM | Group President, MS | 38,323 | $70.12 | $2.69M | -$1.31M | 6 | 2020-01-29 |
Recent Filings
10 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-02-10 | Amentum Holdings, Inc. (AMTMw) Delisted | Mixed | +16,626 | $0 | EDGAR |
| 2025-04-10 | Amentum Holdings, Inc. (AMTMw) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-03-07 | Amentum Holdings, Inc. (AMTMw) Delisted | Mixed | +394,788 | $0 | EDGAR |
| 2024-11-08 | Amentum Holdings, Inc. (AMTMw) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-01-29 | ACM | Mixed | +26,560 | $335.9K | EDGAR |
| 2019-12-31 | ACM | Mixed | −30,240 | -$1.31M | EDGAR |
| 2019-12-17 | ACM | Mixed | +7,553 | $152.5K | EDGAR |
| 2018-12-18 | ACM | Mixed | +8,137 | $100.9K | EDGAR |
| 2018-05-03 | ACM | Mixed | +1,104 | $38.0K | EDGAR |
| 2017-12-18 | ACM | Mixed | +8,556 | $316.0K | EDGAR |