1. Corporate Officers - K
2. Klein Rosemary L

Insider Trading History of Klein Rosemary L

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Klein Rosemary L since 2021. This trader's CIK number is 1310202. At the time of last reporting, Klein Rosemary L was the SVP, CLO & Corp. Sec. of Core Natural Resources, Inc.. (stock ticker symbol CNR). Also see all insider trading activities at Core Natural Resources, Inc..

Note that in the past Klein Rosemary L also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Arch Resources, Inc. (ARCH) by Klein Rosemary L

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2024	ARCH	0	$0	1,708	$315,980	8,724	$0
2023	ARCH	0	$0	5,123	$816,127	8,619	$0
2022	ARCH	0	$0	484	$55,769	6,045	$0
2021	ARCH	0	$0	213	$13,661	2,661	$0

Yearly summary of insider trading at Core Natural Resources, Inc. (CNR) by Klein Rosemary L

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2026	CNR	0	$0	15,000	$1,617,150	0	$0

Insider trading activities at 2 companies by Klein Rosemary L:

1. Arch Resources, Inc. (ARCH)

2. Core Natural Resources, Inc. (CNR)

Table 1. Insider trading of Arch Resources, Inc. (ARCH) by Klein Rosemary L

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2024-10-13	ARCH	Option Ex	757	.00	0
2024-02-25	ARCH	Option Ex	5,117	.00	0
2024-02-09	ARCH	Option Ex	1,033	.00	0
2024-02-10	ARCH	Option Ex	1,817	.00	0
2024-01-19	ARCH	Sale	1,708	185.00	315,980
2023-11-24	ARCH	Sale	158	165.00	26,070
2023-10-13	ARCH	Option Ex	1,136	.00	0
2023-10-16	ARCH	Sale	316	154.91	48,951
2023-03-03	ARCH	Sale	1,549	165.00	255,585
2023-02-25	ARCH	Option Ex	5,117	.00	0
2023-02-27	ARCH	Option Ex	550	.00	0
2023-02-28	ARCH	Sale	2,477	158.28	392,071
2023-02-16	ARCH	Sale	623	150.00	93,450
2023-02-10	ARCH	Option Ex	1,816	.00	0
2022-10-13	ARCH	Option Ex	379	.00	0
2022-10-13	ARCH	Sale	30	136.00	4,080
2022-02-28	ARCH	Sale	44	116.52	5,126
2022-02-27	ARCH	Option Ex	550	.00	0
2022-02-25	ARCH	Sale	410	113.57	46,563
2022-02-25	ARCH	Option Ex	5,116	.00	0
2021-10-25	ARCH	Option Ex	850	.00	0
2021-10-25	ARCH	Sale	68	96.47	6,559
2021-03-01	ARCH	Sale	145	48.98	7,102
2021-02-27	ARCH	Option Ex	550	.00	0
2021-02-22	ARCH	Option Ex	1,261	.00	0

Table 2. Insider trading of Core Natural Resources, Inc. (CNR) by Klein Rosemary L

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2026-03-19	CNR	Sale	15,000	107.81	1,617,150

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Klein Rosemary L (SVP, CLO & Corp. Sec. of Core Natural Resources, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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