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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 AMTM, 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 $12.1M 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.

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Disclosed Exposure

$12.10M

Companies

2

Total Filings

10

Lifetime Open-Market Net

-$1.31M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
AMTM Director 424,780 $22.43 $9.53M $0 4 2026-02-10
ACM Group President, MS 38,323 $67.05 $2.57M -$1.31M 6 2020-01-29

Recent Filings

10 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-02-10 AMTM Mixed +16,626 $0 EDGAR
2025-04-10 AMTM Grant (A) — $0 EDGAR
2025-03-07 AMTM Mixed +394,788 $0 EDGAR
2024-11-08 AMTM 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
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.