Joseph P. Platt Jr.

Sits on 2 boards. Last updated September 28, 2026

Time on boards

Boards served
2
Current seats
2
Board service
7 years
Director since
2023

7 years of board service in total across 2 boards, counting each seat separately. Longest: Core Natural Resources Inc., 3 years.

3 years ยท Since 2023
3 years ยท Since 2023

Shareholder support

Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

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 7, 2026 Greenlight Capital Re Ltd. Grant or award +7,992 โ€” โ€”
May 26, 2026 Greenlight Capital Re Ltd. Open-market sale โˆ’11,747 $16.87 $198,172
May 19, 2026 Greenlight Capital Re Ltd. Open-market sale โˆ’23,613 $18.01 $425,270
May 14, 2026 Greenlight Capital Re Ltd. Open-market sale โˆ’12,000 $17.50 $210,000
May 13, 2026 Greenlight Capital Re Ltd. Open-market sale โˆ’820 $17.50 $14,350
May 12, 2026 Greenlight Capital Re Ltd. Open-market sale โˆ’6,820 $17.50 $119,350
Feb 17, 2026 Core Natural Resources Inc. Grant or award +1,610 โ€” โ€”
Nov 18, 2025 Greenlight Capital Re Ltd. Open-market purchase +5,000 $12.97 $64,850
Aug 7, 2025 Greenlight Capital Re Ltd. Grant or award +8,046 โ€” โ€”
Feb 18, 2025 Core Natural Resources Inc. Grant or award +1,674 โ€” โ€”
Feb 18, 2025 Core Natural Resources Inc. Grant or award +1,674 โ€” โ€”
Aug 9, 2024 Greenlight Capital Re Ltd. Grant or award +8,393 โ€” โ€”
May 7, 2024 Core Natural Resources Inc. Grant or award +1,733 โ€” โ€”
Sep 15, 2023 Core Natural Resources Inc. Open-market sale โˆ’10,227 $98.33 $1,005,621
Aug 7, 2023 Greenlight Capital Re Ltd. Grant or award +9,342 โ€” โ€”

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