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.
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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 · Page 6 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 |
|---|---|---|---|---|---|
| 2012-11-30 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Sell (S) | −10,000 | -$520.1K | EDGAR |
| 2012-10-16 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | — | — | $0 | EDGAR |
| 2012-10-16 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Sell (S) | −10,000 | -$549.5K | EDGAR |
| 2012-10-01 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Sell (S) | −10,000 | -$544.3K | EDGAR |
| 2012-09-12 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Sell (S) | −10,000 | -$536.5K | EDGAR |
| 2012-02-02 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Tax (F) | −18,897 | -$1.10M | EDGAR |
| 2012-01-30 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Grant (A) | +61,959 | $0 | EDGAR |
| 2011-02-02 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Tax (F) | −19,522 | -$850.6K | EDGAR |
| 2011-01-31 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Grant (A) | +55,728 | $0 | EDGAR |
| 2010-08-30 | MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Grant (A) | −22,000 | $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.