CNR · Core Natural Resources, Inc.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 1,390 shares reported, 1,390 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 1,390 shares reported, 1,390 are unvested restricted stock units.

This acquisition was made in connection with a gift under a long-term strategy for estate planning purposes.

Of the 291,415 shares reported, 44,640 are unvested restricted stock units.

This disposition was made in connection with a gift under a long-term strategy for estate planning purposes.

Of the 53,679 shares, 11,045 shares represent unvested restricted stock units.

This sale was made in connection with a long-term strategy for estate planning purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.62 to $101.57, inclusive. The reporting person undertakes to provide to Core Natural Resources, Inc., any security holder of Core Natural Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.65 to $97.75, inclusive. The reporting person undertakes to provide to Core Natural Resources, Inc., any security holder of Core Natural Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

Of the 5,190 shares reported, 1,314 are unvested restricted stock units.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.25 to $91.75, inclusive. The reporting person undertakes to provide to Core Natural Resources, Inc., any security holder of Core Natural Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

Of the 6,190 shares reported, 1,314 are unvested restricted stock units.

Of the 18,034 shares reported, 2,200 are unvested restricted stock units.

On February 19, 2026, the reporting person filed a Form 4 (the "Original Form 4") which inadvertently reported in the second row of Table I an incorrect amount of shares of common stock withheld to satisfy the reporting person's tax liability due to a clerical error. The corrected amount of securities withheld to satisfy the reporting person's tax liability was 2,960 shares.

On February 19, 2026, the reporting person filed a Form 4 (the "Original Form 4") which inadvertently reported in the second row of Table I an incorrect amount of shares of common stock withheld to satisfy the reporting person's tax liability due to a clerical error. The corrected amount of shares withheld to satisfy the reporting person's tax liability was 79 shares.

Due to immaterial clerical rounding errors, the reporting person's Original Form 4 inadvertently reported an incorrect total amount of securities directly beneficially owned by the reporting person and mistakenly indicated an incorrect amount of unvested restricted stock units owned. The corrected amount of securities beneficially owned by the reporting person is 9,990, of which 1,314 shares represent unvested restricted stock units.

On November 13, 2025, the revocable trust for which the reporting person's spouse is the sole trustee and beneficiary transferred 140,760 shares to a spousal lifetime access trust (SLAT 1) for the benefit of the reporting person's spouse and children.

On November 13, 2025, the revocable trust for which the reporting person's spouse is the sole trustee and beneficiary transferred 140,760 shares to a spousal lifetime access trust (SLAT 1) for the benefit of the reporting person's spouse and children.

The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2025 and represents an automatic sale.

Of the 9,307 shares reported, 828 are unvested restricted stock units.

The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2025 and represents an automatic sale.

The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2025 and represents an automatic sale.

Of the 11,307 shares reported, 828 are unvested restricted stock units.

Represents shares of common stock sold to cover the Reporting Person's tax liability from the vesting of restricted stock awards previously granted to the Reporting Person that fully vested in connection with the terms of the Agreement and Plan of Merger, dated as of August 20, 2024, by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), Mountain Range Merger Sub Inc. and Arch Resources, Inc.

Of the 21,830 shares reported, 4,576 are unvested restricted stock units.

Represents shares of common stock sold to cover the Reporting Person's tax liability from the vesting of restricted stock awards previously granted to the Reporting Person that fully vested in connection with the terms of the Agreement and Plan of Merger, dated as of August 20, 2024, by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), Mountain Range Merger Sub Inc. and Arch Resources, Inc.

Of the 23,348 shares reported, 3,348 are unvested restricted stock units.

Represents a gift of 165,200 shares of the Issuer's common stock to a revocable trust for which the reporting person's spouse is the sole trustee and beneficiary. The gift was made for tax and estate planning purposes.

Of the 370,575 shares reported, 40,192 are unvested restricted stock units.

Represents a gift of 165,200 shares of the Issuer's common stock to a revocable trust for which the reporting person's spouse is the sole trustee and beneficiary. The gift was made for tax and estate planning purposes.

This transaction was executed in multiple trades at prices ranging from $66.88 to $66.96 per share. The price reported above reflects the weighted average purchase price on the date indicated. The Reporting Person hereby undertakes to provide upon request to the Securities Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares purchased at each price within the ranges set forth in footnote (1) to this Form 4.

Of the 341,062 shares reported, 40,192 are unvested restricted stock units.

Represents shares of common stock sold to cover the Reporting Person's tax liability from the vesting of restricted stock awards previously granted to the Reporting Person that fully vested in connection with the terms of the Agreement and Plan of Merger, dated as of August 20, 2024, by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), Mountain Range Merger Sub Inc. and Arch Resources, Inc.

This transaction was executed in multiple trades at prices ranging from $75.45 to $75.90 per share. The price reported above reflects the weighted average purchase price on the date indicated. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares.

Of the 13,348 shares reported, 3,348 are unvested restricted stock units.

This transaction was executed in multiple trades at prices ranging from $74.42 to $75.40 per share. The price reported above reflects the weighted average purchase price on the date indicated. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares.

Represents shares of common stock sold to cover the Reporting Person's tax liability from the vesting of restricted stock awards previously granted to the Reporting Person that fully vested in connection with the terms of the Agreement and Plan of Merger, dated as of August 20, 2024, by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), Mountain Range Merger Sub Inc. and Arch Resources, Inc.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 26,391 shares reported, 3,348 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 54,956 shares reported, 16,956 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 535,775 shares reported, 40,192 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 20,913 shares reported, 9,646 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Pursuant to the Agreement and Plan of Merger, dated as of August 20, 2024 (the "Merger Agreement"), by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), a Delaware corporation (the "Company"), Mountain Range Merger Sub Inc., a Delaware corporation and wholly-owned subsidiary of the Company ("Merger Sub") and Arch Resources, Inc., a Delaware corporation ("Arch"), on January 14, 2025, Merger Sub merged with and into Arch, with Arch surviving the merger as a wholly-owned subsidiary of the Company (the "Merger"). At the effective time of the Merger (the "Effective Time"), pursuant to the terms of the Merger Agreement, each restricted stock unit award of the Company held by the Reporting Person that was outstanding immediately prior to the Effective Time fully vested and settled in the number of shares of common stock, par value $0.01 per share, of the Company covered by such award.

Of the 7,707 shares reported, 3,348 are unvested restricted stock units (including dividend equivalent rights) and 4,359 are vested deferred stock units (including dividend equivalent rights).

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 22,163 shares reported, 3,348 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 333,562 shares reported, 40,192 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 12,624 shares reported, 6,404 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Pursuant to the Agreement and Plan of Merger, dated as of August 20, 2024 (the "Merger Agreement"), by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), a Delaware corporation (the "Company"), Mountain Range Merger Sub Inc., a Delaware corporation and wholly-owned subsidiary of the Company ("Merger Sub") and Arch Resources, Inc., a Delaware corporation ("Arch"), on January 14, 2025, Merger Sub merged with and into Arch, with Arch surviving the merger as a wholly-owned subsidiary of the Company (the "Merger"). At the effective time of the Merger (the "Effective Time"), pursuant to the terms of the Merger Agreement, each restricted stock unit award of the Company held by the Reporting Person that was outstanding immediately prior to the Effective Time fully vested and settled in the number of shares of common stock, par value $0.01 per share, of the Company covered by such award.

Of the 7,707 shares reported, 3,348 are unvested restricted stock units (including dividend equivalent rights) and 4,359 are vested deferred stock units (including dividend equivalent rights).

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 66,365 shares reported, 10,048 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Of the 21,590 shares reported, 14,994 are unvested restricted stock units.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of two years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Pursuant to the Agreement and Plan of Merger, dated as of August 20, 2024 (the "Merger Agreement"), by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), a Delaware corporation (the "Company"), Mountain Range Merger Sub Inc., a Delaware corporation and wholly-owned subsidiary of the Company ("Merger Sub") and Arch Resources, Inc., a Delaware corporation ("Arch"), on January 14, 2025, Merger Sub merged with and into Arch, with Arch surviving the merger as a wholly-owned subsidiary of the Company (the "Merger"). At the effective time of the Merger (the "Effective Time"), pursuant to the terms of the Merger Agreement, each restricted stock unit award of the Company held by the Reporting Person that was outstanding immediately prior to the Effective Time fully vested and settled in the number of shares of common stock, par value $0.01 per share, of the Company covered by such award.

Of the 39,038 shares reported, 3,348 are unvested restricted stock units (including dividend equivalent rights).