JOHN C MOLLENKOPF
CIK 1235082 · Exec VP and COO · last filed 2026-07-14
"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.
Loading insider history…
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 · Page 2 of 7
70 filingsInsider 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 |
|---|---|---|---|---|---|
| 2024-01-12 | AM | Grant (A) | +2 | $0 | EDGAR |
| 2023-10-12 | AM | Grant (A) | +2,915 | $0 | EDGAR |
| 2023-07-13 | AM | Grant (A) | +3,095 | $0 | EDGAR |
| 2023-04-12 | AM | Grant (A) | +3,098 | $0 | EDGAR |
| 2023-01-12 | AM | Grant (A) | +2,925 | $0 | EDGAR |
| 2022-10-12 | AM | Grant (A) | +3,371 | $0 | EDGAR |
| 2022-07-12 | AM | Grant (A) | +3,490 | $0 | EDGAR |
| 2022-04-12 | AM | Grant (A) | +2,981 | $0 | EDGAR |
| 2022-01-12 | AM | Grant (A) | +3,205 | $0 | EDGAR |
| 2021-10-12 | AM | Grant (A) | +2,962 | $0 | 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.
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.