Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 6 years
- Director since
- 2023
6 years of board service in total across 3 boards, counting each seat separately. Longest: Westlake Corporation, 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Seadrill Limited June 3, 202699.9%
-
ONEOK Inc. May 20, 202699.3%
-
Seadrill Limited May 14, 202599.5%
-
Westlake Corporation May 9, 202497.5%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 8, 2026 | Westlake Corporation | Option exercise | +2,168 | — | — |
| May 20, 2026 | ONEOK Inc. | Grant or award | +1,845 | $92.15 | $170,017 |
| May 14, 2026 | Seadrill Limited | Option exercise | +4,860 | — | — |
| Jan 23, 2026 | ONEOK Inc. | Grant or award | +727 | $78.00 | $56,706 |
| Aug 9, 2025 | Westlake Corporation | Option exercise | +1,128 | — | — |
| Apr 17, 2025 | Seadrill Limited | Option exercise | +2,409 | — | — |
| Aug 11, 2024 | Westlake Corporation | Option exercise | +1,136 | — | — |
| Aug 12, 2023 | Westlake Corporation | Option exercise | +1,446 | — | — |
Questions about Mark A. Mccollum
What boards is Mark A. Mccollum on?
Mark A. Mccollum sits on the boards of ONEOK Inc., Seadrill Limited and Westlake Corporation.
How long has Mark A. Mccollum served on boards?
Our records show at least 6 years of board service across 3 boards, the earliest from 2023.
Reviews (0)
Sign in to write a review.
No reviews yet. Be the first to write one.