FRANK M SEMPLE
CIK 1270065 · Chairman, President & CEO · last filed 2026-05-19
"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
$10.18M
Companies
7
Total Filings
144
Lifetime Open-Market Net
-$7.13M
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 |
|---|---|---|---|---|---|---|---|
| MPLX | Director | 110,722 | $56.87 | $6.30M | -$7.33M | 83 | 2026-05-19 |
| MPC | Director | 14,719 | $263.58 | $3.88M | $0 | 27 | 2026-05-04 |
| Hyliion Holdings Corp. (HYLN.WS) Delisted | Director | 40,000 | — | — | $0 | 1 | 2020-10-05 |
| ANDEAVOR LOGISTICS LP (ANDX) Delisted | Director | 2,359 | — | — | $0 | 6 | 2019-07-03 |
| Hyliion Holdings Corp. (SHLL.U) Delisted | Director | — | — | — | $0 | 1 | 2019-03-06 |
| MARKWEST ENERGY PARTNERS L P (MWE) Delisted | Chairman, President & CEO | 363,069 | — | — | $204.0K | 21 | 2015-02-03 |
| MARKWEST HYDROCARBON INC (MWP) Delisted | President, CEO | 40,556 | — | — | $0 | 2 | 2008-01-09 |
Recent Filings · Page 12 of 15
144 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-01-05 | MPC | Grant (A) | +637 | $0 | EDGAR |
| 2017-01-05 | MPLX | Grant (A) | +727 | $0 | EDGAR |
| 2016-12-28 | MPLX | Sell (S) | −45,000 | -$1.53M | EDGAR |
| 2016-11-23 | MPLX | Sell (S) | −45,000 | -$1.53M | EDGAR |
| 2016-11-16 | MPLX | Grant (A) | +6 | $0 | EDGAR |
| 2016-11-03 | MPC | Grant (A) | +528 | $0 | EDGAR |
| 2016-11-03 | MPLX | Grant (A) | +432 | $0 | EDGAR |
| 2016-10-31 | MPLX | Sell (S) | −45,000 | -$1.53M | EDGAR |
| 2015-12-08 | — | Disp (D) | −344,774 | -$13.39M | |
| 2015-12-08 | MPLX | Grant (A) | +711,294 | $0 | 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.