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JOHN C MOLLENKOPF

CIK 1235082 · Exec VP and COO · last filed 2026-07-14

JOHN C MOLLENKOPF is an Exec VP and COO who has filed 70 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for AM, was dated Jul 14, 2026. Across all open-market trades the lifetime net is −$3.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $26.5M 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

$26.51M

Companies

4

Total Filings

70

Lifetime Open-Market Net

-$3.78M

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
AM Director 106,566 $21.97 $2.34M $0 36 2026-07-14
MPLX Exec VP and COO 413,452 $58.45 $24.17M $0 2 2015-12-22
MARKWEST ENERGY PARTNERS L P (MWE) Delisted EVP, Chief Operating Officer 270,444 — — -$3.78M 27 2015-12-03
MARKWEST HYDROCARBON INC (MWP) Delisted SVP, Chief Operations Officer 5,267 — — $0 2 2008-01-04

Recent Filings

70 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
2026-07-14 AM Grant (A) +1,907 $0 EDGAR
2026-04-14 AM Grant (A) +1,617 $0 EDGAR
2026-01-12 AM Grant (A) +2,058 $0 EDGAR
2025-10-14 AM Grant (A) +1,935 $0 EDGAR
2025-07-14 AM Grant (A) +2,042 $0 EDGAR
2025-04-14 AM Grant (A) +2,243 $0 EDGAR
2025-01-13 AM Grant (A) +2,302 $0 EDGAR
2024-10-15 AM Grant (A) +2,308 $0 EDGAR
2024-07-11 AM Grant (A) +2,415 $0 EDGAR
2024-04-11 AM Grant (A) +2,517 $0 EDGAR
Showing 1–10 of 70
Page 1 of 7
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.