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: Markel Group 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.
-
nVent Electric plc May 15, 202699.4%
-
CMS Energy Corporation May 8, 2026100.0%
-
Markel Group Inc. May 21, 202599.1%
-
Markel Group Inc. May 22, 202498.3%
-
Markel Group Inc. May 16, 202397.9%
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 |
|---|---|---|---|---|---|
| Jul 17, 2026 | nVent Electric plc | Shares withheld for tax | −222 | $154.92 | $34,392 |
| Jun 15, 2026 | Markel Group Inc. | Other | +66 | $1,668.65 | $109,997 |
| May 20, 2026 | Markel Group Inc. | Grant or award | +89 | — | — |
| May 15, 2026 | nVent Electric plc | Grant or award | +976 | — | — |
| May 8, 2026 | CMS Energy Corporation | Grant or award | +2,411 | — | — |
| May 7, 2026 | Markel Group Inc. | Open-market purchase | +50 | $1,789.19 | $89,460 |
| May 6, 2026 | Markel Group Inc. | Open-market purchase | +100 | $1,792.61 | $179,261 |
| Feb 25, 2026 | CMS Energy Corporation | Open-market purchase | +2,000 | $76.70 | $153,400 |
| Feb 20, 2026 | CMS Energy Corporation | Grant or award | +769 | — | — |
| Aug 13, 2025 | nVent Electric plc | Open-market purchase | +1,900 | $89.84 | $170,696 |
| Aug 13, 2025 | nVent Electric plc | Open-market purchase | +100 | $90.07 | $9,007 |
| Jul 17, 2025 | nVent Electric plc | Grant or award | +1,748 | — | — |
| Jun 13, 2025 | Markel Group Inc. | Other | +63 | $1,735.89 | $110,003 |
| May 21, 2025 | Markel Group Inc. | Grant or award | +88 | — | — |
| Jun 14, 2024 | Markel Group Inc. | Other | +79 | $1,389.66 | $110,005 |
Questions about Diane Leopold
What boards is Diane Leopold on?
Diane Leopold sits on the boards of CMS Energy Corporation, Markel Group Inc. and nVent Electric plc.
How long has Diane Leopold served on boards?
Our records show at least 6 years of board service across 3 boards, the earliest from 2023.
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