Mark A. McCollum
CIK: 0001215888
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (12 total)
- Aug 14, 2026WLK
WESTLAKE CORP
Award(A)DirectRestricted Stock Units
2.2K shares- - Aug 8, 2026WLK
WESTLAKE CORP
Exercise(M)Direct2.2K shares- - Jun 3, 2026SDRL
SEADRILL Ltd
Award(A)DirectRestricted Stock Units
2.6K shares- - May 20, 2026OKE
ONEOK INC /NEW/
Award(A)Direct1.8K shares at avg. $92.15$170K - May 14, 2026SDRL
Seadrill Ltd
Exercise(M)Direct4.9K shares- - Jan 23, 2026OKE
ONEOK INC /NEW/
Award(A)Direct727 shares at avg. $78.00$57K - Aug 9, 2025WLK
WESTLAKE CORP
Exercise(M)Direct1.1K shares- - Aug 8, 2025WLK
WESTLAKE CORP
Award(A)DirectRestricted Stock Units
2.2K shares- - May 14, 2025SDRL
Seadrill Ltd
Award(A)DirectRestricted Stock Units
4.9K shares- - Apr 17, 2025SDRL
Seadrill Ltd
Exercise(M)Direct2.4K shares- - Nov 22, 2024MRO
MARATHON OIL CORP
Disposition(D)Direct8.1K shares- - Nov 22, 2024MRO
MARATHON OIL CORP
Disposition(D)Direct8.2K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 14, 2026 |  WLK WESTLAKE CORP | Award(A) Restricted Stock Units | 2,184 | - | - | Direct |
| Aug 8, 2026 | WLK WESTLAKE CORP | Exercise(M) | 2,168 | - | $0 | Direct |
| Jun 3, 2026 |  SDRL SEADRILL Ltd | Award(A) Restricted Stock Units | 2,618 | - | - | Direct |
| May 20, 2026 |  OKE ONEOK INC /NEW/ | Award(A) | 1,845 | $92.15 | $170,017 | Direct |
| May 14, 2026 | SDRL Seadrill Ltd | Exercise(M) | 4,860 | - | $0 | Direct |
| Jan 23, 2026 | OKE ONEOK INC /NEW/ | Award(A) | 727 | $78.00 | $56,706 | Direct |
| Aug 9, 2025 | WLK WESTLAKE CORP | Exercise(M) | 1,128 | - | - | Direct |
| Aug 8, 2025 | WLK WESTLAKE CORP | Award(A) Restricted Stock Units | 2,168 | - | - | Direct |
| May 14, 2025 | SDRL Seadrill Ltd | Award(A) Restricted Stock Units | 4,860 | - | - | Direct |
| Apr 17, 2025 | SDRL Seadrill Ltd | Exercise(M) | 2,409 | - | - | Direct |
| Nov 22, 2024 |  MRO MARATHON OIL CORP | Disposition(D) | 8,130 | - | $0 | Direct |
| Nov 22, 2024 | MRO MARATHON OIL CORP | Disposition(D) | 8,169 | - | $0 | Direct |
1-12 of 12 transactions
About MCCOLLUM MARK A
MCCOLLUM MARK A (SEC CIK 0001215888) files insider reports with the SEC as Director of WESTLAKE CORP (WLK), Director of SEADRILL Ltd (SDRL) and Director of ONEOK INC /NEW/ (OKE). Signal8 also holds filings tied to 1 other company.
Signal8 holds 12 ownership filings by MCCOLLUM MARK A (2 Form 3, 10 Form 4), filed between Nov 22, 2024 and Aug 17, 2026. Those filings report 12 transactions, from Nov 22, 2024 to Aug 14, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on MCCOLLUM MARK A's filings is in HOUSTON, TX.
Recent filings by MCCOLLUM MARK A
- Aug 14, 2026: Grant or award of WLK derivative securities (Form 4, code A).
- Aug 8, 2026: Option exercise of WLK shares (Form 4, code M).
- Jun 3, 2026: Grant or award of SDRL derivative securities (Form 4, code A).
- May 20, 2026: Grant or award of OKE shares (Form 4, code A).
- May 14, 2026: Option exercise of SDRL shares (Form 4, code M).
Other insiders filing for WESTLAKE CORP (WLK)
- Darby Tommy, VP and CAO
- Sheets Jeffrey Wayne, Director
- Sabat Carolyn Chao, Director
- Patel Bhavesh V., Director
- NORTHCUTT R BRUCE, Director
- Lubel Kimberly S, Director