MCCOLLUM MARK A
SEC insider (Form 3/4/5 filer). CIK 0001215888. Director at WESTLAKE CORP (WLK) and 3 other issuers. 12 reported Form 4/5 transactions since Sep 2024; latest on Aug 14, 2026. Located in HOUSTON, TX.
Companies MCCOLLUM MARK A has filed insider reports for
- WESTLAKE CORP (WLK): Director
- SEADRILL Ltd (SDRL): Director
- ONEOK INC /NEW/ (OKE): Director
- MARATHON OIL CORP (MRO): Director
MCCOLLUM MARK A
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
AwardDirectRestricted Stock Units
2.2K shares- - Aug 8, 2026WLK
WESTLAKE CORP
ExerciseDirect2.2K shares- - Jun 3, 2026SDRL
SEADRILL Ltd
AwardDirectRestricted Stock Units
2.6K shares- - May 20, 2026OKE
ONEOK INC /NEW/
AwardDirect1.8K shares at avg. $92.15$170K - May 14, 2026SDRL
Seadrill Ltd
ExerciseDirect4.9K shares- - Jan 23, 2026OKE
ONEOK INC /NEW/
AwardDirect727 shares at avg. $78.00$57K - Aug 9, 2025WLK
WESTLAKE CORP
ExerciseDirect1.1K shares- - Aug 8, 2025WLK
WESTLAKE CORP
AwardDirectRestricted Stock Units
2.2K shares- - May 14, 2025SDRL
Seadrill Ltd
AwardDirectRestricted Stock Units
4.9K shares- - Apr 17, 2025SDRL
Seadrill Ltd
ExerciseDirect2.4K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 14, 2026 |  WLK WESTLAKE CORP | Award Restricted Stock Units | 2,184 | - | - | Direct |
| Aug 8, 2026 | WLK WESTLAKE CORP | Exercise | 2,168 | - | $0 | Direct |
| Jun 3, 2026 |  SDRL SEADRILL Ltd | Award Restricted Stock Units | 2,618 | - | - | Direct |
| May 20, 2026 |  OKE ONEOK INC /NEW/ | Award | 1,845 | $92.15 | $170,017 | Direct |
| May 14, 2026 | SDRL Seadrill Ltd | Exercise | 4,860 | - | $0 | Direct |
| Jan 23, 2026 | OKE ONEOK INC /NEW/ | Award | 727 | $78.00 | $56,706 | Direct |
| Aug 9, 2025 | WLK WESTLAKE CORP | Exercise | 1,128 | - | - | Direct |
| Aug 8, 2025 | WLK WESTLAKE CORP | Award Restricted Stock Units | 2,168 | - | - | Direct |
| May 14, 2025 | SDRL Seadrill Ltd | Award Restricted Stock Units | 4,860 | - | - | Direct |
| Apr 17, 2025 | SDRL Seadrill Ltd | Exercise | 2,409 | - | - | Direct |
1-10 of 12 transactions