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Who

John C. Mollenkopf

Director

Company insider

Files Form 4 as: Director, Antero Midstream; Director, Antero Midstream Partners LP; Exec VP and COO, Mplx LP; EVP, Chief Operating Officer, Markwest Energy Partners L P; SVP, Chief Operations Officer, Markwest Hydrocarbon.

In numbers

Trades disclosed
111
Buys
0
Sells
7
Bought
$0
Sold
$3.8M
Companies
5
Companies where not an officer
2
First trade
31 Jan 2005
Last trade
10 Oct 2026
Last filed
13 Oct 2026

Companies traded

Where they are an officer
MPLX Mplx LPOfficer · Midstream & Pipelines · last 18 Dec 20150 buys · 0 sells
Markwest Energy Partners L POfficer · last 4 Dec 20150 buys · 7 sells
Markwest HydrocarbonOfficer · last 21 Feb 20080 buys · 0 sells
Everywhere else they filed: board seats, 10% stakes, other companies
AM Antero MidstreamDirector · Midstream & Pipelines · last 10 Oct 20260 buys · 0 sells
Antero Midstream Partners LPDirector · last 12 Mar 20190 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
10 Oct 2026filed 13 Oct 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,015 at $0.00filing
10 Jul 2026filed 14 Jul 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—1,907 at $0.00filing
10 Jul 2026filed 14 Jul 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—1,907 at $0.00filing
10 Apr 2026filed 14 Apr 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—1,617 at $0.00filing
10 Apr 2026filed 14 Apr 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—1,617 at $0.00filing
10 Jan 2026filed 12 Jan 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,058 at $0.00filing
10 Jan 2026filed 12 Jan 2026AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,058 at $0.00filing
10 Oct 2025filed 14 Oct 2025AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—1,935 at $0.00filing
10 Jul 2025filed 14 Jul 2025AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,042 at $0.00filing
10 Apr 2025filed 14 Apr 2025AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,243 at $0.00filing
10 Jan 2025filed 13 Jan 2025AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,302 at $0.00filing
10 Oct 2024filed 15 Oct 2024AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,308 at $0.00filing
10 Jul 2024filed 11 Jul 2024AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,415 at $0.00filing
10 Apr 2024filed 11 Apr 2024AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,517 at $0.00filing
10 Jan 2024filed 12 Jan 2024AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2.9 at $0.00filing
10 Oct 2023filed 12 Oct 2023AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,915 at $0.00filing
10 Jul 2023filed 13 Jul 2023AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—3,095 at $0.00filing
10 Apr 2023filed 12 Apr 2023AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—3,098 at $0.00filing
10 Jan 2023filed 12 Jan 2023AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—2,925 at $0.00filing
10 Oct 2022filed 12 Oct 2022AM Antero MidstreamMidstream & PipelinesSEC FORM 4 Code A—3,371 at $0.00filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Not placed7

Buys in green, sells in red, by the company’s sector.

Related people

Christopher A. HelmsDirector · Director at Mplx LP, filing Form 4 there in the last year
John P. SurmaDirector · Director at Mplx LP, filing Form 4 there in the last year
Frank M. SempleDirector · Director at Mplx LP, filing Form 4 there in the last year
Ray N. Walker Jr.Director · Director at Mplx LP, filing Form 4 there in the last year
J. Michael SticeDirector · Director at Mplx LP, filing Form 4 there in the last year