Who
Frank M. Semple
Director
Company insider
Files Form 4 as: Vice Chairman, Mplx LP; Director, Marathon Petroleum; Director, Hyliion Holdings; Director, Andeavor Logistics LP; Chairman, President & CEO, Markwest Energy Partners L P; President, CEO, Markwest Hydrocarbon.
In numbers
- Trades disclosed
- 202
- Buys
- 2
- Sells
- 6
- Bought
- $204K
- Sold
- $7.3M
- Companies
- 6
- Companies where not an officer
- 3
- First trade
- 31 Jan 2005
- Last trade
- 14 Aug 2026
- Last filed
- 18 Aug 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 14 Aug 2026filed 18 Aug 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,072.719 at $0.00 | filing |
| 14 Aug 2026filed 18 Aug 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,072.72 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,194.074 at $0.00 | filing |
| 15 May 2026filed 19 May 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,194.07 at $0.00 | filing |
| 30 Apr 2026filed 5 Aug 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —3,028.941 at $0.00 | filing |
| 30 Apr 2026filed 5 Aug 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —3,028.94 at $0.00 | filing |
| 30 Apr 2026filed 4 May 2026 | MPC Marathon PetroleumRefining & Marketing | SEC FORM 4 Code A | —727.742 at $0.00 | filing |
| 30 Apr 2026filed 4 May 2026 | MPC Marathon PetroleumRefining & Marketing | SEC FORM 4 Code A | —727.74 at $0.00 | filing |
| 30 Apr 2026filed 4 May 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —2,579.543 at $0.00 | filing |
| 30 Apr 2026filed 4 May 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —2,579.54 at $0.00 | filing |
| 17 Feb 2026filed 19 Feb 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,071.818 at $0.00 | filing |
| 17 Feb 2026filed 19 Feb 2026 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,071.82 at $0.00 | filing |
| 14 Nov 2025filed 18 Nov 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,132.3 at $0.00 | filing |
| 15 Aug 2025filed 19 Aug 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —1,050.57 at $0.00 | filing |
| 16 May 2025filed 20 May 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —990.06 at $0.00 | filing |
| 1 May 2025filed 5 May 2025 | MPC Marathon PetroleumRefining & Marketing | SEC FORM 4 Code A | —1,275.96 at $0.00 | filing |
| 1 May 2025filed 5 May 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —2,848.35 at $0.00 | filing |
| 1 Apr 2025filed 3 Apr 2025 | MPC Marathon PetroleumRefining & Marketing | SEC FORM 4 Code A | —93.59 at $0.00 | filing |
| 1 Apr 2025filed 3 Apr 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —220.45 at $0.00 | filing |
| 14 Feb 2025filed 18 Feb 2025 | MPLX Mplx LPMidstream & Pipelines | SEC FORM 4 Code A | —887.93 at $0.00 | filing |
News
No headline names them, or the companies they trade most, lately.