Platt Joseph P JR

Director at GREENLIGHT CAPITAL RE, LTD. · on record since May 25, 2007
Director at CNX Resources Corp · on record since May 13, 2016
Director at Core Natural Resources, Inc. · on record since Dec 14, 2017

Insider trading activity of Platt Joseph P JR

Transactions on record: 50; since May 25, 2007

Open-market buys: 2; $115.9K

Open-market sells: 12; $3.2M

Companies traded: 3; last filing Aug 7, 2026

Figures computed from official regulatory filings — .

Companies where Platt Joseph P JR has traded

GREENLIGHT CAPITAL RE, LTD.33 tx · $1.6M · Aug 7, 2026
Core Natural Resources, Inc.15 tx · $1.7M · Feb 19, 2026
CNX Resources Corp2 tx · May 11, 2017

Track record of Platt Joseph P JR

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Platt Joseph P JR

Co-insiders of Platt Joseph P JR

Brock James ACNX Resources Corp +1
CARPENTER ALVIN RCNX Resources Corp +1
EINHORN DAVIDCNX Resources Corp +1
Khani David M.CNX Resources Corp +1
MILLS JOHN TCNX Resources Corp +1
POWELL WILLIAM PCNX Resources Corp +1
ROBERSON EDCNX Resources Corp +1
Accurso LauraGREENLIGHT CAPITAL RE, LTD.
Agbede RobertCNX Resources Corp
Akinkugbe OlayemiCNX Resources Corp
ALTMEYER JAMES ECNX Resources Corp
Archambault StevenGREENLIGHT CAPITAL RE, LTD.
BAXTER PHILLIP WCNX Resources Corp
Bedard Timothy ScottCNX Resources Corp
Behl NavneetCNX Resources Corp
Belfatti Michael JGREENLIGHT CAPITAL RE, LTD.
Bergeron SophieCore Natural Resources, Inc.
Braithwaite Robert J. Jr.Core Natural Resources, Inc.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 7, 2026	Award	7,992	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 27, 2026	Sell	-11,747	16.87 USD	$198.2K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 20, 2026	Sell	-23,613	18.01 USD	$425.3K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 18, 2026	Sell	-12,000	17.50 USD	$210K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 14, 2026	Sell	-6,820	17.50 USD	$119.4K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 14, 2026	Sell	-820	17.50 USD	$14.4K		SEC
Core Natural Resources, Inc.Listing unverified	Feb 19, 2026	Award	1,610	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Nov 19, 2025	Buy	5,000	12.97 USD	$64.9K	conv 62First in 12mo	SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 8, 2025	Award	8,046	—	n/a (No price was disclosed in the filing)		SEC
Core Natural Resources, Inc.Listing unverified	Feb 20, 2025	Award	1,674	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	Feb 20, 2025	Award	1,674	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 12, 2024	Award	8,393	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 9, 2024	Award	1,733	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	Sep 19, 2023	Sell	-10,227	98.33 USD	$1M	Unusual size	SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 7, 2023	Award	9,342	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 4, 2023	Award	2,347	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 5, 2022	Award	23,427	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 25, 2022	Sell	-11,377	51.34 USD	$584.1K	Unusual size	SEC
Core Natural Resources, Inc.Listing unverified	May 25, 2022	Sell	-2,800	51.90 USD	$145.3K		SEC
Core Natural Resources, Inc.Listing unverified	May 5, 2022	Award	3,062	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 6, 2021	Award	14,177	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Nov 12, 2020	Award	14,266	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 12, 2020	Award	20,242	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 13, 2019	Award	4,815	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 13, 2019	Award	16,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 7, 2026	Award	7,992	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 27, 2026	Sell	-11,747	16.87 USD	$198.2K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 20, 2026	Sell	-23,613	18.01 USD	$425.3K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 18, 2026	Sell	-12,000	17.50 USD	$210K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 14, 2026	Sell	-6,820	17.50 USD	$119.4K		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 14, 2026	Sell	-820	17.50 USD	$14.4K		SEC
Core Natural Resources, Inc.Listing unverified	Feb 19, 2026	Award	1,610	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Nov 19, 2025	Buy	5,000	12.97 USD	$64.9K	conv 62First in 12mo	SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 8, 2025	Award	8,046	—	n/a (No price was disclosed in the filing)		SEC
Core Natural Resources, Inc.Listing unverified	Feb 20, 2025	Award	1,674	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	Feb 20, 2025	Award	1,674	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 12, 2024	Award	8,393	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 9, 2024	Award	1,733	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	Sep 19, 2023	Sell	-10,227	98.33 USD	$1M	Unusual size	SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 7, 2023	Award	9,342	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 4, 2023	Award	2,347	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Aug 5, 2022	Award	23,427	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 25, 2022	Sell	-11,377	51.34 USD	$584.1K	Unusual size	SEC
Core Natural Resources, Inc.Listing unverified	May 25, 2022	Sell	-2,800	51.90 USD	$145.3K		SEC
Core Natural Resources, Inc.Listing unverified	May 5, 2022	Award	3,062	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 6, 2021	Award	14,177	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	Nov 12, 2020	Award	14,266	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 12, 2020	Award	20,242	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Core Natural Resources, Inc.Listing unverified	May 13, 2019	Award	4,815	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
GREENLIGHT CAPITAL RE, LTD.Listing on record	May 13, 2019	Award	16,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC