John M. Gellert
President and CEO at SEACOR Marine Holdings Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: SEACOR Marine Holdings Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
SEACOR Marine Holdings Inc. June 6, 202499.5%
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SEACOR Marine Holdings Inc. June 6, 202399.9%
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 |
|---|---|---|---|---|---|
| Mar 7, 2026 | SEACOR Marine Holdings Inc. | Option exercise | +9,562 | — | — |
| Mar 7, 2026 | SEACOR Marine Holdings Inc. | Shares withheld for tax | −4,193 | $7.31 | $30,651 |
| Mar 4, 2026 | SEACOR Marine Holdings Inc. | Shares withheld for tax | −65,932 | $7.63 | $503,061 |
| Feb 27, 2026 | SEACOR Marine Holdings Inc. | Grant or award | +87,965 | — | — |
| Mar 11, 2025 | SEACOR Marine Holdings Inc. | Gift | +10,153 | — | — |
| Mar 11, 2025 | SEACOR Marine Holdings Inc. | Option exercise | +58,905 | — | — |
| Mar 11, 2025 | SEACOR Marine Holdings Inc. | Shares withheld for tax | −25,860 | $5.08 | $131,369 |
| Mar 7, 2025 | SEACOR Marine Holdings Inc. | Gift | +7,027 | — | — |
| Mar 4, 2025 | SEACOR Marine Holdings Inc. | Shares withheld for tax | −65,205 | $5.26 | $342,978 |
| Feb 28, 2025 | SEACOR Marine Holdings Inc. | Grant or award | +183,084 | — | — |
| Mar 12, 2024 | SEACOR Marine Holdings Inc. | Gift | −10,153 | — | — |
| Mar 12, 2024 | SEACOR Marine Holdings Inc. | Option exercise | +51,315 | — | — |
| Mar 12, 2024 | SEACOR Marine Holdings Inc. | Shares withheld for tax | −22,579 | $12.54 | $283,141 |
| Mar 7, 2024 | SEACOR Marine Holdings Inc. | Gift | +5,607 | — | — |
| Mar 4, 2024 | SEACOR Marine Holdings Inc. | Grant or award | +159,300 | — | — |
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