Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 2 boards, counting each seat separately. Longest: Diamondback Energy Inc., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Mammoth Energy Services Inc. June 25, 202696.8%
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Diamondback Energy Inc. May 20, 202697.1%
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Diamondback Energy Inc. June 6, 202495.7%
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Diamondback Energy Inc. June 8, 202396.9%
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 |
|---|---|---|---|---|---|
| Sep 16, 2026 | Mammoth Energy Services Inc. | Open-market purchase | +5,000 | $3.00 | $15,000 |
| Aug 21, 2026 | Diamondback Energy Inc. | Open-market sale | −1,000 | $210.58 | $210,580 |
| Jun 9, 2026 | Diamondback Energy Inc. | Open-market sale | −500 | $196.50 | $98,250 |
| May 20, 2026 | Diamondback Energy Inc. | Grant or award | +982 | — | — |
| Jun 19, 2025 | Diamondback Energy Inc. | Other | +2,965 | — | — |
| May 21, 2025 | Diamondback Energy Inc. | Grant or award | +1,417 | — | — |
| Dec 5, 2024 | Diamondback Energy Inc. | Gift | −100 | — | — |
| Nov 13, 2024 | Diamondback Energy Inc. | Open-market sale | −1,150 | $181.00 | $208,150 |
| Nov 13, 2024 | Diamondback Energy Inc. | Gift | −2,310 | — | — |
| Nov 13, 2024 | Diamondback Energy Inc. | Open-market sale | −240 | $181.00 | $43,440 |
| Nov 12, 2024 | Diamondback Energy Inc. | Other | −11,724 | — | — |
| Nov 12, 2024 | Diamondback Energy Inc. | Other | +5,862 | — | — |
| Jun 6, 2024 | Diamondback Energy Inc. | Grant or award | +1,035 | — | — |
| Jun 8, 2023 | Diamondback Energy Inc. | Grant or award | +1,527 | — | — |
Questions about Mark Lawrence Plaumann
What boards is Mark Lawrence Plaumann on?
Mark Lawrence Plaumann sits on the boards of Diamondback Energy Inc. and Mammoth Energy Services Inc.
How long has Mark Lawrence Plaumann served on boards?
Our records show at least 4 years of board service across 2 boards, the earliest from 2023.
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