Who
Mark A. McCollum
Director
Company insider
Files Form 4 as: Director, Westlake; Director, Seadrill; Director, Oneok; Director, Marathon Oil; President and CEO, Weatherford International; Director, Archrock; EVP - Chief Financial Officer, Halliburton; Director, Exterran Partners, L.P.
In numbers
- Trades disclosed
- 193
- Buys
- 0
- Sells
- 10
- Bought
- $0
- Sold
- $15.5M
- Companies
- 8
- Companies where not an officer
- 6
- First trade
- 12 Sep 2006
- Last trade
- 14 Aug 2026
- Last filed
- 17 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 17 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,184 at $0.00 | filing |
| 14 Aug 2026filed 17 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,184 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK WestlakeChemicals | SEC FORM 4 Code M | —2,168 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —2,168 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —2,168 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK WestlakeChemicals | SEC FORM 4 Code M | —2,168 | filing |
| 3 Jun 2026filed 5 Jun 2026 | SDRL Seadrilloption or derivative · Oilfield services | SEC FORM 4 Code A | —2,618 at $0.00 | filing |
| 3 Jun 2026filed 5 Jun 2026 | SDRL Seadrilloption or derivative · Oilfield services | SEC FORM 4 Code A | —2,618 at $0.00 | filing |
| 20 May 2026filed 22 May 2026 | OKE OneokMidstream & Pipelines | SEC FORM 4 Code A | $170K1,845 at $92.15 | filing |
| 20 May 2026filed 22 May 2026 | OKE OneokMidstream & Pipelines | SEC FORM 4 Code A | $170K1,845 at $92.15 | filing |
| 14 May 2026filed 18 May 2026 | SDRL SeadrillOilfield services | SEC FORM 4 Code M | —4,860 | filing |
| 14 May 2026filed 18 May 2026 | SDRL Seadrilloption or derivative · Oilfield services | SEC FORM 4 Code M | —4,860 at $0.00 | filing |
| 14 May 2026filed 18 May 2026 | SDRL Seadrilloption or derivative · Oilfield services | SEC FORM 4 Code M | —4,860 at $0.00 | filing |
| 14 May 2026filed 18 May 2026 | SDRL SeadrillOilfield services | SEC FORM 4 Code M | —4,860 | filing |
| 23 Jan 2026filed 27 Jan 2026 | OKE OneokMidstream & Pipelines | SEC FORM 4 Code A | $57K727 at $78.00 | filing |
| 23 Jan 2026filed 27 Jan 2026 | OKE OneokMidstream & Pipelines | SEC FORM 4 Code A | $57K727 at $78.00 | filing |
| 9 Aug 2025filed 11 Aug 2025 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —1,128 at $0.00 | filing |
| 9 Aug 2025filed 11 Aug 2025 | WLK WestlakeChemicals | SEC FORM 4 Code M | —1,128 | filing |
| 8 Aug 2025filed 11 Aug 2025 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,168 at $0.00 | filing |
| 14 May 2025filed 16 May 2025 | SDRL Seadrilloption or derivative · Oilfield services | SEC FORM 4 Code A | —4,860 at $0.00 | filing |
News
Here Are Thursday's Top Wall Street Analyst Research Calls: Alcoa, Block, Constellation Energy, Dick's Sporting Goods, Dutch Bros, Halliburton Company, Netflix, Southern Company,Tesla, and MoreHAL · aol.com · 22 Oct 2026Halliburton: Frac Market Getting Tight, Crew Prices Moving UpHAL · marcellusdrilling.com · 21 Oct 2026Halliburton Sees Years of Growth as Mideast RebuildsHAL · rigzone.com · 21 Oct 2026
0 headlines in the last 90 days name Mark A. McCollum; 3 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.