Jean-Marc Gilson
President and CEO at Westlake Chemical Partners LP
Sits on 2 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 3 years
- Director since
- 2024
3 years of board service in total across 2 boards, counting each seat separately. Longest: Westlake Chemical Partners LP, 2 years.
Westlake Chemical Partners LP
Director · President and CEO
Corteva Inc.
Director
Chief executive roles
Westlake Chemical Partners LP
· President and CEO
Since July 2024
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 |
|---|---|---|---|---|---|
| Apr 28, 2026 | Corteva Inc. | Grant or award | +2,350 | — | — |
| Aug 27, 2025 | Westlake Chemical Partners LP | Open-market purchase | +95 | $21.25 | $2,025 |
| Aug 21, 2025 | Westlake Chemical Partners LP | Open-market purchase | +1,250 | $22.02 | $27,525 |
| Aug 20, 2025 | Westlake Chemical Partners LP | Open-market purchase | +1,250 | $21.86 | $27,325 |
| Aug 15, 2025 | Westlake Chemical Partners LP | Open-market purchase | +4,700 | $21.84 | $102,648 |
| May 29, 2025 | Westlake Chemical Partners LP | Open-market purchase | +94 | $22.20 | $2,081 |
| Feb 25, 2025 | Westlake Chemical Partners LP | Open-market purchase | +83 | $24.75 | $2,042 |
| Nov 27, 2024 | Westlake Chemical Partners LP | Open-market purchase | +85 | $23.57 | $2,003 |
| Aug 29, 2024 | Westlake Chemical Partners LP | Open-market purchase | +1,000 | $22.83 | $22,830 |
| Aug 28, 2024 | Westlake Chemical Partners LP | Open-market purchase | +500 | $22.94 | $11,470 |
| Aug 27, 2024 | Westlake Chemical Partners LP | Open-market purchase | +1,000 | $22.95 | $22,950 |
| Aug 26, 2024 | Westlake Chemical Partners LP | Open-market purchase | +500 | $22.85 | $11,425 |
| Aug 23, 2024 | Westlake Chemical Partners LP | Open-market purchase | +500 | $22.88 | $11,440 |
| Aug 22, 2024 | Westlake Chemical Partners LP | Open-market purchase | +427 | $22.60 | $9,650 |
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