JOHN C MOLLENKOPF
CIK 1235082 · Exec VP and COO · last filed 2026-04-14
"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.
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Disclosed Exposure
$25.78M
Companies
4
Total Filings
69
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 | 104,659 | $21.67 | $2.27M | $0 | 35 | 2026-04-14 |
| MPLX | Exec VP and COO | 413,452 | $56.87 | $23.51M | $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 4 of 7
69 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2018-10-12 | AM | Grant (A) | +735 | $0 | EDGAR |
| 2018-07-12 | AM | Grant (A) | +824 | $0 | EDGAR |
| 2018-04-12 | AM | Grant (A) | +1,002 | $0 | EDGAR |
| 2018-01-12 | AM | Grant (A) | +805 | $0 | EDGAR |
| 2017-10-12 | AM | Grant (A) | +793 | $0 | EDGAR |
| 2017-07-12 | AM | Grant (A) | +769 | $0 | EDGAR |
| 2015-12-22 | MPLX | Grant (A) | +118,669 | $0 | EDGAR |
| 2015-12-08 | — | Disp (D) | −270,444 | -$10.50M | |
| 2015-12-08 | MPLX | Grant (A) | +294,783 | $0 | EDGAR |
| 2015-12-03 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Tax (F) | −35,503 | -$1.63M | EDGAR |
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.