MARK A MCCOLLUM
CIK 1215888 · President and CEO · last filed 2026-06-05
"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
$4.44M
Companies
9
Total Filings
87
Lifetime Open-Market Net
-$11.99M
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 |
|---|---|---|---|---|---|---|---|
| SDRL | Director | 7,269 | $44.25 | $321.7K | $0 | 4 | 2026-06-05 |
| OKE | Director | 2,572 | $90.59 | $233.0K | $0 | 2 | 2026-05-22 |
| WLK | Director | 9,656 | $88.50 | $854.6K | $0 | 11 | 2025-08-11 |
| MARATHON OIL CORP (MRO) Delisted | Director | 0 | $28.55 | $0 | $0 | 4 | 2024-11-22 |
| Weatherford International plc (WFT) Delisted | President and CEO | 1,665,615 | — | — | $0 | 5 | 2019-04-25 |
| AROC | Director | 82,751 | $36.61 | $3.03M | $0 | 4 | 2018-04-27 |
| HALLIBURTON CO (HALw) Delisted | EVP - Chief Financial Officer | 204,993 | — | — | -$11.99M | 45 | 2017-03-01 |
| Archrock, Inc. (EXH) Delisted | Director | 39,195 | — | — | $0 | 7 | 2015-03-05 |
| Archrock Partners, L.P. (EXLP) Delisted | Director | 2,000 | — | — | $0 | 4 | 2009-06-01 |
Recent Filings · Page 3 of 9
87 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2019-04-25 | Weatherford International plc (WFT) Delisted | Tax (F) | −125,892 | -$79.3K | EDGAR |
| 2019-02-04 | Weatherford International plc (WFT) Delisted | Tax (F) | −73,253 | -$46.9K | EDGAR |
| 2018-08-20 | WLK | Grant (A) | — | $0 | EDGAR |
| 2018-05-21 | WLK | Grant (A) | — | $0 | EDGAR |
| 2018-04-27 | AROC | Grant (A) | +2,800 | $0 | EDGAR |
| 2018-04-26 | Weatherford International plc (WFT) Delisted | Tax (F) | −77,903 | -$201.8K | EDGAR |
| 2018-03-05 | AROC | Grant (A) | +13,158 | $0 | EDGAR |
| 2018-02-02 | Weatherford International plc (WFT) Delisted | Grant (A) | +845,771 | $0 | EDGAR |
| 2017-04-25 | Weatherford International plc (WFT) Delisted | Grant (A) | +1,096,892 | $0 | EDGAR |
| 2017-03-06 | AROC | Grant (A) | +9,125 | $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.