Joseph P. Platt Jr.

Companies

• Core Natural Resources, Inc.Board member Dec 1, 2017 to now¹
• GREENLIGHT CAPITAL RE, LTD.Board member May 24, 2007 to now²
• Consol EnergyBoard member May 13, 2016 to May 11, 2017³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• CNCore Natural Resources, Inc. CNR40,660 shares⁴$3.7M at $90.39Feb 24, 2026
• GCGREENLIGHT CAPITAL RE, LTD. GLRE177,611 shares⁵$2.7M at $14.95Aug 7, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Aug 7, 2026Granted 7,992 shares of GREENLIGHT CAPITAL RE, LTD.⁵
• May 26, 2026Sold 11,747 shares at $16.87 of GREENLIGHT CAPITAL RE, LTD.⁶
• May 19, 2026Sold 23,613 shares at $18.01 of GREENLIGHT CAPITAL RE, LTD.⁷
• May 14, 2026Sold 12,000 shares at $17.50 of GREENLIGHT CAPITAL RE, LTD.⁸
• May 13, 2026Sold 820 shares at $17.50 of GREENLIGHT CAPITAL RE, LTD.⁹
• May 12, 2026Sold 6,820 shares at $17.50 of GREENLIGHT CAPITAL RE, LTD.⁹
• Feb 17, 2026Granted 1,610 shares of Core Natural Resources, Inc.¹⁰
• Nov 18, 2025Bought 5,000 shares at $12.97 of GREENLIGHT CAPITAL RE, LTD.¹¹
• Aug 7, 2025Granted 8,046 shares of GREENLIGHT CAPITAL RE, LTD.¹²
• Feb 18, 2025Granted 1,674 shares of Core Natural Resources, Inc.¹³
• Feb 18, 2025Granted 1,674 shares of Core Natural Resources, Inc.¹³
• Aug 9, 2024Granted 8,393 shares of GREENLIGHT CAPITAL RE, LTD.¹⁴
• May 7, 2024Granted 1,733 shares of Core Natural Resources, Inc.¹⁵
• Sep 15, 2023Sold 10,227 shares at $98.33 of Core Natural Resources, Inc.¹⁶
• Aug 7, 2023Granted 9,342 shares of GREENLIGHT CAPITAL RE, LTD.¹⁷
• May 2, 2023Granted 2,347 shares of Core Natural Resources, Inc.¹⁸
• Aug 5, 2022Granted 23,427 shares of GREENLIGHT CAPITAL RE, LTD.¹⁹
• May 23, 2022Sold 2,800 shares at $51.90 of Core Natural Resources, Inc.²⁰
• May 23, 2022Sold 11,377 shares at $51.34 of Core Natural Resources, Inc.²⁰
• May 3, 2022Granted 3,062 shares of Core Natural Resources, Inc.²¹