UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): January 39, 2025

Arch Resources, Inc.

(Exact name of registrant as specified in its charter)

Delaware

1-13105

43-0921172

(State or other jurisdiction of

incorporation)

(Commission File Number)

(IRS Employer Identification No.)

CityPlace One

One CityPlace Drive, Suite 300

St. Louis, Missouri 63141

(Address, including zip code, of principal executive offices)

Registrant’s telephone number, including area code: (314) 994-2700

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

x¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, $.01 par value		ARCH		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 85.0107 ~~Other~~Submission ~~Events~~of Matters to a Vote of Security Holders.

~~As previously disclosed, on August 20, 2024,~~ Arch Resources, Inc., a Delaware corporation (the “~~Arch~~Company”), ~~entered~~held ~~into~~a anspecial ~~Agreement~~meeting ~~and~~of ~~Plan~~stockholders (the “Special Meeting”) on January 9, 2025 for the Company’s stockholders to vote on the matters described below in connection with the merger of ~~Merger~~equals transaction contemplated ~~(as~~by itthe ~~may~~Agreement beand ~~amended~~Plan ~~from~~of ~~time~~Merger, todated ~~time~~as of August 20, 2024 (the “~~merger~~Merger ~~agreement~~Agreement”), ~~with~~by and among the Company, CONSOL Energy Inc., ~~a Delaware corporation~~ (“CONSOL”), and Mountain Range Merger Sub Inc., a Delaware corporation and a wholly owned subsidiary of CONSOL (“Merger Sub”). ~~The~~Upon ~~merger agreement provides that, upon~~ the terms and subject to the conditions ~~set~~of ~~forth~~the ~~therein~~Merger Agreement, Merger Sub will merge with and into ~~Arch~~the Company (the “~~merger~~Merger”), with ~~Arch~~the Company continuing as the surviving corporation in the ~~merger~~Merger and a wholly owned subsidiary of CONSOL. ~~The merger agreement was unanimously approved by the board of directors of each of Arch and CONSOL.~~

InThe ~~connection~~following ~~with~~proposals were submitted by the ~~merger, CONSOL~~Board ~~filed~~of Directors of the Company to a ~~Registration~~vote ~~Statement~~of onstockholders ~~Form S-4~~at ~~(as~~the ~~amended~~Special Meeting, and the ~~“Registration~~final ~~Statement”)~~results ~~with~~of the ~~Securities and~~voting ~~Exchange~~on ~~Commission~~each (proposal is noted below. On the ~~“SEC”)~~record ~~that~~date ~~also~~of ~~includes~~November 26, a2024, ~~prospectus~~there were 18,108,609 shares of ~~CONSOL~~the Company’s common stock outstanding and aentitled to vote. Each proposal is described in more detail in the definitive joint proxy statement/prospectus offiled with ~~Arch~~the Securities and ~~CONSOL~~Exchange Commission on November 26, as ~~amended~~2024. The ~~Registration~~Merger ~~Statement~~is ~~was~~expected ~~declared~~to ~~effective~~be completed on ~~November~~or around January 2614, ~~2024~~ 2025, ~~after~~subject ~~which~~to ~~Arch~~the ~~filed~~satisfaction aor ~~definitive~~waiver ~~joint~~of ~~proxy~~the remaining customary closing conditions. Following the Merger, the combined company ~~statement~~will be renamed “Core Natural Resources, Inc.” and ~~CONSOL~~will ~~filed~~be aheadquartered ~~final~~in ~~prospectus.~~Canonsburg, ~~Arch~~Pennsylvania, ~~and~~with ~~CONSOL~~its ~~commenced~~common stock ~~mailing~~expected ofto trade on the ~~definitive~~New ~~joint~~York ~~proxy~~Stock ~~statement/prospectus~~Exchange ~~to their~~under ~~respective~~the ~~stockholders~~ticker onsymbol or“CNR” ~~about~~beginning ~~November~~at the open of trading on January 2615, ~~2024~~ 2025.

~~Following~~Proposal ~~the announcement~~1 of– ~~the~~Vote ~~merger~~to ~~agreement,~~Adopt ~~as of~~ the ~~date~~Merger of this Current Report on Form 8-K, three lawsuits challenging the merger have been filed (each, a “Lawsuit” and, collectively, the “Lawsuits”). The first Lawsuit, captioned Robert Garfield v. James Brock et al. (Case No. 2024-CV-08379), was filed in the Supreme Court of Pennsylvania for Dauphin county on December 12, 2024. The second Lawsuit, captioned Nathan Turner v. Arch Resources, Inc. et al. (Case No. 659683/2024), was filed in the Supreme Court of the State of New York for the county of New York on December 16, 2024. The third Lawsuit, captioned Michael Lewis v. Arch Resources, Inc. et al. (Case No. 659716/2024), was filed in the Supreme Court of the State of New York for the county of New York on December 17, 2024. In addition, Arch and CONSOL received demand letters from counsel representing individual stockholders of Arch and CONSOL, respectively (the “Demand Letters” and, together with the Lawsuits, the “Matters”). The Matters each generally allege that the joint proxy statement/prospectus filed by Arch and CONSOL, and their respective directors and officers, in connection with the proposed merger contains false and misleading statements and/or omissions, and demand that the parties issue corrective disclosures.Agreement

~~Arch~~The ~~and~~stockholders ~~CONSOL~~were ~~believe that~~asked ~~the allegations asserted in the Matters are without merit and additional disclosures are not required or necessary under applicable laws. However, in order~~ to ~~avoid~~vote ~~the~~on ~~risk~~a ~~that~~proposal ~~the Matters delay or otherwise adversely affect the merger, and~~ to ~~minimize~~adopt the ~~cost,~~Merger ~~risk and uncertainty inherent in litigation~~Agreement, ~~and~~providing ~~without admitting any liability or wrongdoing~~for, ~~Arch~~among ~~and~~other CONSOL have agreed to voluntarily supplement the joint proxy statement/prospectus as described in this Current Report on Form 8-K. Arch and CONSOL deny that they have violated any laws or breached any duties to Arch’s stockholders or CONSOL’s stockholdersthings, ~~as applicable. Nothing in this Current Report on Form 8-K shall be deemed an admission of~~ the ~~legal~~Merger ~~necessity or materiality under applicable laws of any of~~ (the ~~disclosures~~“Merger ~~set~~Proposal”). ~~forth~~The ~~herein.~~Merger ToProposal ~~the contrary, Arch and CONSOL specifically deny all allegations in the Matters that any additional disclosure~~ was ~~or is required. To the extent that the information set forth herein differs from or updates information contained in the joint proxy statement/prospectus~~approved, ~~the~~ ~~information~~as ~~set~~indicated ~~forth herein shall supersede or supplement the information in the joint proxy statement/prospectus. All page references are to pages in the joint proxy statement/prospectus, and terms used~~ below~~, unless otherwise defined, have the meanings set forth in the joint proxy statement/prospectus~~. ~~For clarity, new text within restated disclosures from the joint proxy statement/prospectus is highlighted with bold, underlined text, while deleted text is bold and stricken-through.~~

Supplemental Disclosures to Joint Proxy Statement/Prospectus in Connection with the Matters

For			Against				Abstain				Broker Non- Votes
14,881,212				116,821				32,952				-

~~The~~Proposal ~~additional~~2 ~~disclosures (the~~– ~~“supplemental~~Advisory ~~disclosures”)~~Vote into ~~this~~Approve ~~Current~~Certain ~~Report~~Named ~~on Form 8-K supplement the disclosures contained in the joint~~Executive ~~proxy~~Officer statement/prospectus and should be read in conjunction with the disclosures contained in the joint proxy statement/prospectus, which should be read in its entirety. To the extent that information set forth in the supplemental disclosures differs from or updates information contained in the joint proxy statement/prospectus, the information in this Current Report on Form 8-K shall supersede or supplement the information contained in the joint proxy statement/prospectus. Page references in the below disclosures are to the joint proxy statement/prospectus, and defined terms used but not defined herein shall have the meanings set forth in the joint proxy statement/prospectus.Compensation

The ~~fourth~~stockholders ~~paragraph~~were asked to vote on ~~page 84~~a ~~under~~proposal to approve, by a non-binding advisory vote, certain compensation that may be paid or become payable to the ~~heading~~Company’s named ~~“Background~~executive ofofficers that is based on or otherwise relates to the Merger (the “Non-Binding Executive Compensation Advisory Proposal”). The isNon-Binding ~~amended~~Executive Compensation Advisory Proposal was approved, on an advisory basis, as ~~follows:~~indicated below.

Also on August 16, 2024, Messrs. Lang, Brock and Thakkar met to discuss and agree upon the pro forma headquarters, name and management team of the combined company as well as other governance matters. At this meeting, it was discussed that Mr. Lang would serve as Chief Executive Officer of the combined company and Mr. Brock would serve as Executive Chair of the combined company. In addition, between August 16, 2024, and August 18, 2024, Messrs. Lang, Brock and Navarre, as well as representatives of PWP and Moelis, had several conversations regarding the proposed exchange ratio to be used in the possible transaction between Arch and CONSOL. During such discussions, Messrs. Lang and Navarre and representatives of PWP each proposed using an exchange ratio based on a trailing volume-weighted-average price of the companies rather than a current trading price.

For			Against				Abstain				Broker Non- Votes
14,418,948				578,582				33,455				-

~~The~~Proposal ~~following~~3 ~~paragraph is~~– ~~added~~Vote ~~after~~to ~~the~~Approve ~~fourth~~Adjournments ~~paragraph on page 84 under the heading “Background~~ of the ~~Merger”:~~Special Meeting

OnThe ~~August 16,~~stockholders ~~2024,~~were asked ~~representatives~~to ofvote ~~Moelis~~on ~~provided~~a ~~customary~~proposal ~~relationship~~to ~~disclosures~~approve toone ~~the~~or ~~CONSOL~~more ~~board~~adjournments ~~with~~of ~~respect~~the Special Meeting to ~~CONSOL~~a ~~and~~later ~~Arch~~date or time, ~~which~~if ~~included~~necessary or appropriate, ~~disclosure~~including ~~that~~adjournments asto ofpermit the ~~date~~solicitation of ~~such~~additional ~~disclosure~~votes ~~Moelis~~or ~~did~~proxies if there are not ~~own~~sufficient orvotes ~~trade~~cast ~~any~~at ~~securities~~the ofSpecial Meeting ~~CONSOL~~to orapprove ~~Arch~~the ~~and~~Merger ~~that~~Proposal ~~none~~(the of“Adjournment Proposal”). Stockholders approved the ~~Moelis~~Adjournment Proposal as indicated ~~managing~~below, ~~directors~~but ~~working~~it onwas ~~the~~not ~~potential~~necessary ~~transaction~~to ~~owned~~adjourn ~~any~~the ~~securities~~Special ofMeeting ~~CONSOL~~since orthe ~~Arch~~Merger Proposal was approved.

The penultimate paragraph on page 94 under the heading “Discounted Cash Flow Analysis—Standalone—CONSOL” is amended as follows:

For			Against				Abstain				Broker Non- Votes
13,342,044				1,653,983				34,958				-

Moelis utilized a range of discount rates of 9.25% to 12.00% based on an estimated range of CONSOL’s weighted average cost of capital (the “WACC”). The estimated WACC range reflected a derived cost of equity range using the capital asset pricing model (“CAPM”) (a) a risk-free rate based on 20-year U.S. government bonds, (b) a selected range of unlevered betas and debt to total capitalization ratios informed by the Selected Companies described below, (c) an equity risk premium and (d) a size premium. Moelis used the foregoing range of discount rates to calculate estimated present values as of June 30, 2024 of (i) estimated unlevered free cash flows of CONSOL for the second half of the calendar year ending December 31, 2024 through the end of the calendar year ending December 31, 2028 (in each case, discounted using a mid-year discounting convention) and (ii) estimated terminal values derived by applying a range of selected terminal multiples of 4.00x to 5.00x to CONSOL’s terminal year LL-Adjusted EBITDA (which was equal to LL-Adjusted EBITDA for the calendar year ending December 31, 2028).

The first full paragraph on page 95 under the heading “Discounted Cash Flow Analysis—Standalone—CONSOL” is amended as follows:

In calculating the implied equity value of CONSOL, Moelis removed the income statement and free cash flow impacts of the legacy liabilities for CONSOL (which CONSOL management estimated to be $557 million on a tax-affected and net of assets basis) and treated these liabilities as net debt adjustments.

The fourth full paragraph on page 95 under the heading “Discounted Cash Flow Analysis—Standalone—Arch” is amended as follows:

Moelis utilized a range of discount rates of 9.25% to 12.00% based on an estimated range of Arch’s WACC. The estimated WACC range reflected a derived cost of equity range using CAPM (a) a risk-free rate based on 20-year U.S. government bonds, (b) a selected range of unlevered betas and debt to total capitalization ratios informed by the Selected Companies described below, (c) an equity risk premium and (d) a size premium. Moelis used the foregoing range of discount rates to calculate estimated present values as of June 30, 2024 of (i) estimated unlevered free cash flows of Arch for the second half of the calendar year ending December 31, 2024 through the end of the calendar year ending December 31, 2028 (in each case, discounted using a mid-year discounting convention) and (ii) estimated terminal values derived by applying a range of selected terminal multiples of 4.50x to 5.50x to Arch’s terminal year LL-Adjusted EBITDA (which was equal to LL-Adjusted EBITDA for the calendar year ending December 31, 2028).

The last sentence of the first paragraph on page 96 under the heading “Discounted Cash Flow Analysis—Standalone—Arch” is amended as follows:

Moelis also removed the income statement and free cash flow impacts of the legacy liabilities for Arch (which CONSOL management estimated to be $244 million on a tax-affected and net of assets basis) and treated these liabilities as net debt adjustments.

The third and fourth full paragraphs on page 101 under the heading “Other Information—Equity Research Share Price Targets” is amended as follows:

Moelis reviewed publicly available consensus estimate stock price targets for shares of CONSOL common stock published as provided by Bloomberg or Wall Street research reports as of August 9, 2024, which ranged from $103.00 to $120.00 per share (which implied a range of equity values for CONSOL of $3,078 million to $3,586 million). Moelis compared this range with the closing trading price of the CONSOL common stock of $95.81 per share on August 19, 2024 (which implied an equity value of CONSOL of $2,863 million).

Moelis also reviewed publicly available consensus estimate stock price targets for shares of Arch common stock as provided by Bloomberg or Wall Street Research reports as of August 19, 2024, which ranged from $155.00 to $200.00 per share (which implied a range of equity values for Arch of $2,862 million to $3,693 million). Moelis compared this range with the closing trading price of the Arch common stock of $127.00 per share on August 19, 2024 (which implied an equity value of Arch of $2,345 million).

The third and fourth paragraphs under the heading “Opinion of Perella Weinberg Partners LP, Arch’s Financial Advisor—Summary of PWP’s Financial Analyses—Selected Public Companies Analysis” on pages 110 through 111 are amended and restated as follows:

The financial information reviewed included enterprise value as a multiple of normalized adjusted EBITDA, which we calculate as the average of actual 2023, estimated 2024, and estimated 2025 adjusted EBITDA. and which wWe refer to this as “Normalized EBITDA,.” and Additionally, we considered estimated 2024 and 2025 adjusted EBITDA, which we refer to as “2024E EBITDA” and “2025E EBITDA,” respectively,. These estimates are based on median broker consensus estimates and, with respect to Arch and CONSOL, the Arch Forecasts and CONSOL Forecasts, with balance sheet items in each case as of June 30, 2024. The low to high of observed following table summarizes EV / Normalized EBITDA multiples, for the selected public companies was 2.9x to 4.5x with a median of 4.3x. The low to high of observed EV / 2024E EBITDA multiples for the selected public companies was 3.3x to 5.8x with a median of 4.6x. The low to high of observed and EV / 2025E EBITDA multiples for of each of the selected public companies was 3.5x to 4.9x with a median of 4.4x.

Selected Public Companies	EV / Normalized EBITDA Multiple (2023A -2025E Avg.)	EV/ 2024E EBITDA Multiple	EV/ 2025E EBITDA Multiple
Alliance Resource Partners Inc.	4.3x	4.5x	4.4x
Alpha Metallurgical Resources, Inc.	4.2x	5.8x	4.9x
Coronado Global Resources Inc.	4.3x	4.6x	3.7x
Peabody Energy Corporation	2.9x	3.3x	3.5x
Warrior Met Coal, Inc.	4.5x	5.0x	4.6x
Median	4.3x	4.6x	4.4x

Based on the ranges observed among the selected public companies, including those identified above, PWP applied selected EV / normalized adjusted EBITDA multiple ranges to the applicable Arch and CONSOL financial metrics, including analyst consensus estimates, the Arch Forecasts and the CONSOL Forecasts, to derive implied enterprise values for Arch and CONSOL. To calculate the implied equity value of Arch from its implied enterprise value, PWP added cash and cash equivalents of $279 million, subtracted debt (including capital leases) of $135 million, subtracted pension, other post-employment benefits and black lung liabilities (on a post-tax basis) and of $157 million, and subtracted net asset reclamation obligations (on a post-tax basis) of $87 million, in each case as provided by Arch management. To calculate the implied equity value of CONSOL from its implied enterprise value, PWP added cash and cash equivalents of $299 million, subtracted debt (including capital leases) of $192 million, subtracted pension and other post-employment benefits (on a post-tax basis) of $191 million, subtracted black lung and long-term disability liabilities (on a post-tax basis) of $147 million and subtracted asset reclamation obligations (on a post-tax basis) of $210 million, in each case as provided by CONSOL management. PWP calculated implied values per share by dividing the implied equity values by the applicable diluted shares (based upon the number of issued and outstanding shares as of August 14, 2024), which was 18.466 million for Arch and 29.883 million for CONSOL, based on information provided by Arch management and CONSOL management, as applicable, and with respect to Arch, including restricted stock units, and with respect to CONSOL, including restricted stock units and performance share units. PWP applied a selected multiple range of 4.0x to 5.0x to Arch’s 2023A-2025E Average EBITDA, resulting in implied reference ranges per share of Arch common stock of $129 to $162 and $125 to $158, based the Arch Forecasts and on analyst consensus estimates, respectively. PWP applied a selected multiple range of 4.0x to 5.0x to CONSOL’s 2023A-2025E Average EBITDA, resulting in implied reference ranges per share of CONSOL common stock of $99 to $127 and $91 to $117, based the CONSOL Forecasts and on analyst consensus estimates, respectively.

The first paragraph under the heading “Opinion of Perella Weinberg Partners LP, Arch’s Financial Advisor—Summary of PWP’s Financial Analyses—Discounted Cash Flow Value Analysis” on pages 111 through 112 is amended as follows:

PWP conducted a discounted cash flow analysis for each of Arch and CONSOL based on the Forecasts to derive a range of implied enterprise values for Arch and CONSOL by:

· calculating the present value as of August 20, 2024 of the estimated standalone unlevered free cash flows in the case of Arch, calculated as Adjusted EBITDA (as defined in in the section entitled “The Merger Agreement—Arch Unaudited Prospective Financial Information” beginning on page 1189 of this joint proxy) minus cash taxes, plus/minus the change in net working capital, minus capital invested in equity investments, minus capital expenditures, minus non-operating expenses, minus other operating and investing activities, plus certain legacy liability costs, minus dividends forecasted to be paid in the third quarter of 2024 and fourth quarter of 2024, minus the cash tax benefit from net operating losses and in the case of CONSOL, calculated as Adjusted EBITDA (as defined in in the section entitled “The Merger Agreement—CONSOL Unaudited Prospective Financial Information” beginning on page 115 of this joint proxy) minus stock based compensation, plus annual non-service costs related to pension, supplemental executive retirement plan (SERP), other post-employment benefits, black lung liabilities and long term disability benefits, minus cash taxes, plus/minus the change in net working capital, minus capital expenditures, minus gains attributable to asset sales, plus changes in other assets and liabilities, minus employee-related long-term liabilities, minus dividends forecasted to be paid in the third quarter of 2024 and fourth quarter of 2024, expected to be generated by Arch and CONSOL for the six months ending December 31, 2024 and the years ending December 31, 2025 through December 31, 2028, as included in the Forecasts, using discount rates ranging from, in the case of Arch, 9.5% to 10.75% and, in the case of CONSOL, 9.75% to 11.00%, and a mid-year convention for discounting; and

· adding the present value as of August 20, 2024 of the terminal value of Arch and CONSOL at the end of calendar year 2028 (which terminal values were calculated to be $2,786-3,482 million for Arch and $3,696-4,620 million for CONSOL) using an implied terminal EBITDA multiple range of, in the case of Arch, 4.0x to 5.0x 2028E Adjusted EBITDA (as defined in in the section entitled “The Merger Agreement—Arch Unaudited Prospective Financial Information” beginning on page 1189 of this joint proxy) and, in the case of CONSOL, 4.0x to 5.0x 2028E Adjusted EBITDA (as defined in in the section entitled “The Merger Agreement—CONSOL Unaudited Prospective Financial Information” beginning on page 115 of this joint proxy) minus stock based compensation, plus annual non-service costs related to pension, supplemental executive retirement plan (SERP), other post-employment benefits, black lung liabilities and long term disability benefits, and discount rates ranging from, in the case of Arch, 9.5% to 10.75% and, in the case of CONSOL, 9.75% to 11.00%. “Present value” refers to the current value of future cash flows or amounts and is obtained by discounting those future cash flows or amounts to a specific point in time by a discount rate that takes into account macroeconomic assumptions and estimates of risk, the opportunity cost of capital, capital structure, income taxes, expected returns and other appropriate factors taken into account based on the professional judgment and experience of PWP.

The third and fourth paragraphs under the heading “Opinion of Perella Weinberg Partners LP, Arch’s Financial Advisor-Summary of PWP’s Financial Analyses—Discounted Cash Flow Value Analysis” on page 112 are amended and restated as follows:

PWP used tThe discount rates as used by PWP for each of Arch and CONSOL were determined based on PWP’s analysis an estimated range of Arch’s and CONSOL’s respective weighted average cost of capital., which was derived by application of the Capital Asset Pricing Model, which takes into account certain company-specific metrics, including Arch’s and CONSOL’s respective target capital structure, the cost of long-term debt, forecasted tax rate and unlevered and levered (Barra) beta, as well as certain financial metrics for the United States financial markets generally, including market risk premium and the 20-year treasury rate (30-day average) as of August 19, 2024.

From the range of implied enterprise values, PWP derived a range of implied equity values for Arch and CONSOL. To calculate the implied equity value of Arch from its implied enterprise value, PWP added cash and cash equivalents of $279 million, subtracted debt (including capital leases) of $135 million, subtracted pension, other post-employment benefits and black lung liabilities (on a post-tax basis) of $157 million, subtracted net asset reclamation obligations (on a post-tax basis) of $87 million, and added the present value of net operating losses (using a discount rate of approximately 6.50%, which rate reflects the midpoint of Arch’s post-tax cost of debt as of August 19, 2024) of $77 million, in each case as provided by Arch management. To calculate the implied equity value of CONSOL from its implied enterprise value, PWP added cash and cash equivalents of $299 million, subtracted debt (including capital leases) of $192 million, subtracted pension and other post-employment benefits (on a post-tax basis) of $191 million, subtracted black lung and long-term disability liabilities (on a post-tax basis) of $147 million and subtracted asset reclamation obligations (on a post-tax basis) of $210 million, in each case as provided by CONSOL management. PWP calculated implied values per share by dividing the implied equity values by the applicable diluted shares (based upon the number of issued and outstanding shares as of August 14, 2024), which was 18.466 million for Arch and 29.883 million for CONSOL, based on information provided by Arch management and CONSOL management, as applicable, and with respect to Arch, including restricted stock units, and with respect to CONSOL, including restricted stock units and performance share units.

The third paragraph under the heading “Opinion of Perella Weinberg Partners LP, Arch’s Financial Advisor-Summary of PWP’s Financial Analyses-Equity Research Analysists’ Price Targets” on page 113 is amended as follows:

Based on comparisons of the high and low research analyst price targets for Arch and CONSOL, PWP derived a range of implied exchange ratios of shares of Arch common stock to shares of CONSOL common stock of 1.483x to 1.931x. PWP compared this exchange ratio range to the exchange ratio of 1.326 shares of CONSOL common stock to be received for each share of Arch common stock as provided for in the merger agreement. The five price targets for Arch observed, when discounted for a period of one year using a cost of equity of 10.50%, were $140, $145, $154, $163 and $179 per share. The two price targets for Arch observed, when discounted for a period of one year using a cost of equity of 11.00%, were $93 and $95 per share. The price targets published by equity research analysts do not necessarily reflect current market trading prices for shares of Arch common stock or CONSOL common stock and these estimates are subject to uncertainties, including the future financial performance of Arch, CONSOL and future financial market conditions.

The last paragraph on page 124 under the heading “Board of Directors and Management of the Combined Company Following the Completion of the Merger” is amended as follows:

Under the terms of the merger agreement, CONSOL has agreed to take all actions as may be necessary to cause (1) the number of directors constituting the combined company’s board as of the effective time of the merger to be eight and (2) the combined company’s board as of the effective time of the merger to be composed of (A) four directors designated by CONSOL, one of whom will be James A. Brock, and (B) four directors designated by Arch, two of whom will be Paul A. Lang and Richard A. Navarre. From and after the effective time of the merger, each person designated as a director of the combined company will serve as a director until such person’s successor has been appointed and qualified or elected or such person’s earlier death, resignation or removal in accordance with the organizational documents of the combined company. Directors of the combined company board will be selected by the membership of the current CONSOL board and Arch board based on their individual experience and skill sets, the overall skill set and composition of the resulting combined company board, and their willingness to serve on the combined company board.

The paragraph on page 133 under the heading “Mr. Brock’s Role with the Combined Company following Completion of the Merger” is amended as follows:

On August 20, 2024, Mr. Brock entered into a Waiver, Acknowledgment and Amendment, pursuant to which Mr. Brock has agreed to serve as Executive Chair of the combined company, reporting to the combined company’s board, following completion of the merger. Mr. Lang will serve as Chief Executive Officer of the combined company following the merger, reporting to Mr. Brock. Mr. Brock has further agreed that the change in his duties upon completion of the merger will not constitute “Good Reason” for purposes of and as defined in the Brock Employment Agreement. Mr. Brock will also serve on the combined company’s board as of the effective time of the merger. Other than as described in this joint proxy statement/prospectus, no changes to Mr. Brock’s compensation arrangements or the Brock Employment Agreement (described under the heading “CEO Employment Agreement” on page 58 of CONSOL’s annual proxy statement for CONSOL’s 2024 Annual Meeting of Stockholders, filed on April 1, 2024) have been agreed to or approved. Each of CONSOL and Arch has begun working with its third party advisors, including existing compensation consultants, to prepare materials regarding post-closing compensation arrangement alternatives. Following the merger, the combined company’s board and/or compensation committee will be presented with recommendations related to future executive officer compensation and will make all decisions relating to any such arrangements, including whether to grant any emergence or similar awards.

Cautionary Statement Regarding Forward-Looking Information

This Current ~~report~~Report on Form 8-K contains ~~certain~~ “forward-looking statements” within the meaning of ~~federal~~Section 27A ~~securities~~of ~~laws.~~the ~~Forward-looking~~Securities Act ~~statements~~of ~~may~~1933, beas ~~identified~~amended, ~~by words~~and Section 21E of the Securities Exchange Act of 1934, as amended, such as ~~“anticipates~~our expected future business and financial performance,” and intended to come within the safe harbor protections provided by those sections. The words “~~believes~~should,” “could,” “~~continue~~appears,” “~~estimate~~estimates,” “expects,” “~~intends~~anticipates,” “~~will~~intends,” “may,” “~~should~~plans,” “~~may~~predicts,” “~~plan~~projects,” “~~predict~~believes,” “~~project~~seeks,” or “~~would~~will” or other comparable words and ~~similar~~phrases ~~expressions.~~identify ~~Forward~~forward-looking statements, ~~are~~which ~~not~~speak ~~statements~~only as of ~~historical~~the ~~fact~~date ~~and~~of this ~~reflect~~Current ~~CONSOL’s~~Report ~~and~~on ~~Arch’s~~Form 8-K. ~~current~~Forward-looking ~~views~~statements ~~about~~by ~~future~~their ~~events.~~nature ~~Such~~address ~~forward-looking~~matters ~~statements~~that ~~include~~are, ~~without~~to ~~limitation~~different degrees, uncertain. ~~statements~~Actual ~~about~~results ~~the~~may ~~benefits~~vary ofsignificantly ~~the~~from ~~proposed~~those ~~transaction~~anticipated ~~involving~~due ~~CONSOL~~to ~~and~~many ~~Arch~~factors, including: ~~future~~the ~~financial~~risk ~~and~~that ~~operating~~an ~~results~~event, change or other circumstances ~~CONSOL’s~~could ~~and~~give ~~Arch’s~~rise ~~plans,~~to ~~objectives,~~the ~~expectations~~termination ~~and~~of ~~intentions,~~the Merger Agreement; the ~~expected~~risk ~~timing~~that ~~and~~a ~~likelihood~~condition ofto ~~completion~~closing of the Merger may not be satisfied on ~~proposed~~a ~~transaction,~~timely basis or at all; the length of time necessary to close the Merger; the risk that the Merger may cause a loss of management personnel and other ~~statements~~key employees; the risk that ~~are~~the businesses of the Company and CONSOL will not ~~historical~~be ~~facts,~~integrated ~~including~~successfully ~~estimates~~after the closing of ~~coal~~the ~~reserves,~~Merger; ~~estimates~~the risk that the anticipated benefits of ~~future~~the ~~production, assumptions~~Merger ~~regarding~~may ~~future~~not ~~coal~~be ~~pricing,~~realized ~~planned~~or ~~delivery~~may oftake ~~coal~~longer to ~~markets~~realize ~~and~~than expected; the risk ~~associated~~of ~~costs,~~litigation ~~future~~related ~~results~~to the Merger; loss of ~~operations~~availability, ~~projected~~ ~~cash~~reliability ~~flow~~and cost-effectiveness of transportation facilities and ~~liquidity~~fluctuations in transportation costs; operating risks beyond our control, ~~business~~including ~~strategy~~risks ~~and~~related ~~other~~to ~~plans~~mining conditions, mining, processing and ~~objectives~~plant equipment ~~for~~failures ~~future~~or ~~operations.~~maintenance Noproblems, ~~assurances~~weather ~~can~~and benatural ~~given that~~disasters, the ~~forward-looking~~unavailability ~~statements~~of ~~contained~~raw inmaterials, ~~this~~equipment ~~report~~or ~~will~~other ~~occur~~critical supplies, asmining ~~projected~~accidents, and ~~actual~~other ~~results~~inherent ~~may~~risks ~~differ~~of ~~materially~~coal ~~from~~mining ~~those projected.~~that ~~Forward-looking~~are ~~statements~~beyond ~~are~~our ~~based~~control; inflationary pressures on ~~current~~and ~~expectations,~~availability and ~~estimates~~price of mining and ~~assumptions~~other ~~that~~industrial ~~involve~~supplies; achanges ~~number~~in ofcoal ~~risks~~prices, ~~and uncertainties~~which ~~that~~may ~~could~~be ~~cause~~caused ~~actual~~by ~~results~~numerous tofactors ~~differ~~beyond ~~materially~~our ~~from~~control, including ~~those~~changes ~~projected.~~in ~~These~~the ~~risks~~domestic and ~~uncertainties~~foreign ~~include,~~supply ~~without limitation,~~of ~~the~~and ~~ability~~demand tofor ~~obtain~~coal and the ~~requisite~~domestic ~~CONSOL~~and foreign demand for steel and ~~Arch~~electricity; volatile ~~stockholder~~economic ~~approvals~~and market conditions; the ~~risk~~effects ~~that~~of anforeign ~~event,~~and ~~change~~domestic ortrade ~~other~~policies, ~~circumstance could~~actions ~~give~~or ~~rise~~disputes toon the ~~termination~~level of trade among the ~~proposed~~countries ~~transaction;~~and ~~the~~regions ~~risk~~in ~~that~~which awe ~~condition~~operate, tothe ~~closing~~competitiveness of ~~the~~our ~~proposed~~exports, ~~transaction~~or ~~may~~our ~~not~~ability to export; the effects of significant beforeign ~~satisfied~~conflicts; the ~~risk~~loss of, ~~delays~~or significant reduction in, ~~completing~~purchases ~~the~~by ~~proposed~~our ~~transaction~~largest customers; ~~the~~our ~~risk~~relationships ~~that~~with, ~~the~~and ~~businesses~~other ~~will~~conditions affecting ~~not~~our becustomers ~~integrated~~and ~~successfully~~our ability to collect payments from our customers; ~~the~~ ~~risk~~risks ~~that~~related ~~the~~to ~~cost~~our ~~savings~~international growth; competition, both within our industry and ~~any~~with ~~other~~producers ~~synergies~~of ~~from~~competing ~~the~~energy ~~proposed~~sources, ~~transaction~~including ~~may~~the ~~not~~effects befrom ~~fully~~any ~~realized~~current or ~~may~~future ~~take~~legislation or ~~longer~~regulations designed to ~~realize than~~support, ~~expected~~promote or mandate renewable energy sources; ~~the~~alternative ~~risk~~steel production technologies that ~~any~~may ~~announcement~~reduce demand ~~relating~~for our coal; our ability to ~~the~~secure ~~proposed~~new ~~transaction~~coal ~~could~~supply ~~have~~arrangements ~~adverse~~or ~~effects~~to onrenew ~~the~~existing ~~market~~coal ~~price~~supply ofarrangements; ~~CONSOL’s~~cyber-attacks or ~~common~~other ~~stock~~security breaches that disrupt our operations, or ~~Arch’s~~that ~~common~~result ~~stock;~~in the ~~risk~~unauthorized release of ~~litigation~~proprietary, ~~related~~confidential or personally identifiable information; our ability to ~~the~~acquire ~~proposed~~or ~~transaction~~develop coal reserves in an economically feasible manner; ~~the~~inaccuracies ~~risk~~in ~~that~~our estimates of our coal reserves; defects in title or the ~~credit~~loss ~~ratings~~ of a leasehold interest; the ~~combined~~availability ~~company~~and orcost ~~its~~of ~~subsidiaries~~surety bonds; including potential collateral requirements; we may benot ~~different~~have ~~from~~adequate ~~what~~insurance ~~the~~coverage ~~companies~~for ~~expect~~some business risks; disruptions in the ~~diversion~~supply of ~~management~~coal ~~time~~ from ~~ongoing~~third ~~business~~parties; ~~operations~~decreases ~~and~~in ~~opportunities~~the ascoal aconsumption of electric power generators could result ofin ~~the~~less ~~proposed~~demand ~~transaction~~and lower prices for thermal coal; our ~~the~~ability ~~risk~~to pay dividends or repurchase shares of ~~adverse~~our ~~reactions~~common orstock ~~changes~~according to ~~business~~our announced intent or at all; the loss of key personnel ~~employee~~or ~~relationships,~~the ~~including~~failure ~~those~~to ~~resulting~~attract ~~from~~additional qualified personnel and the ~~announcement~~availability of skilled employees and other workforce factors; public health emergencies, such as pandemics or ~~completion~~epidemics, ofcould ~~the~~have ~~proposed~~an ~~transaction~~adverse effect on our business; ~~the~~existing ~~dilution~~and ~~caused~~future legislation and byregulations ~~CONSOL~~affecting both our coal mining operations and our customers’s ~~issuance~~coal ofusage, ~~additional~~governmental ~~shares~~policies ofand ~~its~~taxes, ~~capital~~including those ~~stock~~aimed inat ~~connection~~reducing ~~with~~emissions ~~the~~of ~~proposed~~elements ~~transaction;~~such ~~changes~~as inmercury, ~~coal~~sulfur ~~prices~~dioxides, nitrogen oxides, particulate matter or greenhouse gases; ~~which~~increased ~~may~~pressure befrom ~~caused~~political byand ~~numerous~~regulatory ~~factors~~authorities, ~~including~~along ~~changes~~with inenvironmental ~~the~~and ~~domestic~~climate ~~and~~change ~~foreign~~activist ~~supply~~groups, ofand lending and ~~demand~~investment ~~for~~policies ~~coal~~adopted by financial institutions and insurance companies to address concerns about the ~~domestic~~environmental impacts ~~and~~of ~~foreign~~coal ~~demand~~combustion; ~~for~~increased ~~steel~~attention ~~and~~to ~~electricity~~environmental, social or governance matters; ~~the~~our ~~volatility~~ability into ~~commodity~~obtain ~~and~~or ~~capital~~renew ~~equipment~~various ~~prices~~permits necessary for ~~coal~~our mining operations; ~~the presence~~risks orrelated ~~recoverability~~to ofregulatory ~~estimated~~agencies ~~reserves;~~ordering ~~the~~certain ~~ability~~of our mines to ~~replace~~be ~~reserves~~temporarily or permanently closed under certain circumstances; risks related to extensive environmental regulations that impose significant costs on our mining operations, and ~~geological~~could ~~risks~~result in litigation or material liabilities; ~~mining~~the accuracy of our estimates of reclamation and ~~operating~~other mine closure obligations; ~~risks~~the existence of hazardous substances or other environmental contamination on property owned or used by us; ~~the~~and risks related to ~~the~~tax ~~availability~~legislation and our ability to use net operating losses and certain tax credits. All forward-looking statements in this Current Report on Form 8-K, as ~~reliability~~well as all other written and ~~cost~~oral forward-~~effectiveness~~looking ofstatements ~~transportation~~attributable ~~facilities~~to us or persons acting on our behalf, are expressly qualified in their entirety by the cautionary statements contained in this section and ~~fluctuations~~elsewhere in ~~transportation~~this Current Report on Form 8-K. These ~~costs;~~factors ~~foreign~~are ~~currency,~~not ~~competition~~necessarily all of the important factors that could affect us. These risks and uncertainties, ~~government~~as ~~regulation~~well oras other ~~actions;~~risks ~~the~~of which ~~ability~~we ofare ~~management~~not aware or which we currently do not believe to ~~execute~~be ~~its~~material, ~~plans~~may cause our actual future results to ~~meet~~be ~~its~~materially different ~~goals;~~from ~~risks~~those ~~associated~~expressed ~~with~~in ~~the~~our ~~evolving~~forward-looking ~~legal,~~statements. ~~regulatory~~These ~~and~~forward-looking ~~tax~~statements ~~regimes;~~speak ~~changes~~only inas ~~economic,~~of ~~financial,~~the ~~political~~date ~~and~~on ~~regulatory~~which such statements ~~conditions;~~were ~~natural~~made, and ~~man~~we do not undertake to update our forward-~~made~~looking ~~disasters;~~statements, ~~civil~~whether ~~unrest~~as a result of new information, ~~pandemics~~future events or otherwise, except as may be required by the federal securities laws. For a description of some of the risks and ~~conditions~~uncertainties that may affect ~~result~~our ~~from~~future ~~legislative~~results, ~~regulatory,~~you ~~trade and~~should ~~policy~~see ~~changes;~~the ~~and~~“Risk ~~other~~Factors” ~~risks~~in ~~inherent~~Item in1A ~~CONSOL’s~~of our Annual Report on Form 10-K for the year ended December 31, 2023 and ~~Arch’s~~subsequent ~~businesses~~Quarterly Reports on Form 10-Q.

All such factors are difficult to predict, are beyond CONSOL’s and Arch’s control, and are subject to additional risks and uncertainties, including those detailed in CONSOL’s annual report on Form 10-K for the year ended December 31, 2023, quarterly reports on Form 10-Q, and current reports on Form 8-K that are available on its website at https://investors.consolenergy.com/sec-filings and on the SEC’s website at http://www.sec.gov, and those detailed in Arch’s annual report on Form 10-K for the year ended December 31, 2023, quarterly reports on Form 10-Q and current reports on Form 8-K that are available on Arch’s website at https://investor.archrsc.com/sec-filings/ and on the SEC’s website at http://www.sec.gov.

Forward-looking statements are based on the estimates and opinions of management at the time the statements are made. Neither CONSOL nor Arch undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. Readers are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date hereof.

No Offer or Solicitation

This report is not intended to be, and shall not constitute, an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made, except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.

Additional Information about the Transaction and Where to Find It

In connection with the proposed transaction, CONSOL filed with the SEC a registration statement on Form S-4 that includes a joint proxy statement of Arch and CONSOL and that also constitutes a prospectus of CONSOL. The registration statement was declared effective by the SEC on November 26, 2024, and Arch and CONSOL commenced mailing the definitive joint proxy statement/prospectus to their respective shareholders on or around November 26, 2024. Each of Arch and CONSOL may also file other relevant documents with the SEC regarding the proposed transaction. This document is not a substitute for the definitive joint proxy statement/prospectus or registration statement or any other document that Arch or CONSOL may file with the SEC. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, JOINT PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS THAT MAY BE FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY CONTAIN OR WILL CONTAIN IMPORTANT INFORMATION ABOUT ARCH, CONSOL AND THE PROPOSED TRANSACTION.

Investors and security holders will be able to obtain free copies of the registration statement, definitive joint proxy statement/prospectus and other documents containing important information about Arch, CONSOL and the proposed transaction, once such documents are filed with the SEC through the website maintained by the SEC at http://www.sec.gov. Copies of the registration statement, definitive joint proxy statement/prospectus and other documents filed with the SEC by Arch may be obtained free of charge on Arch’s website at https://investor.archrsc.com/sec-filings/ or, alternatively, by directing a request by mail to Arch’s Corporate Secretary at One CityPlace Drive, Suite 300, St. Louis, Missouri, 63141. Copies of the registration statement, definitive joint proxy statement/prospectus and other documents filed with the SEC by CONSOL may be obtained free of charge on CONSOL’s website at https://investors.consolenergy.com/sec-filings or, alternatively, by directing a request by mail to CONSOL’s Corporate Secretary at 275 Technology Drive, Suite 101, Canonsburg, Pennsylvania 15317.

Participants in the Solicitation

Arch, CONSOL and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information about the directors and executive officers of Arch, including a description of their direct or indirect interests, by security holdings or otherwise, is set forth in Arch’s proxy statement for its 2024 Annual Meeting of Stockholders, which was filed with the SEC on March 27, 2024, including under the headings “Executive Compensation,” “Director Compensation,” “Equity Compensation Plan Information,” and “Security Ownership of Directors and Executive Officers.” To the extent holdings of Arch common stock by the directors and executive officers of Arch have changed from the amounts of Arch common stock held by such persons as reflected therein, such changes have been or will be reflected on Initial Statements of Beneficial Ownership of Securities on Form 3 (“Form 3”), Statements of Changes in Beneficial Ownership on Form 4 (“Form 4”) or Annual Statements of Changes in Beneficial Ownership of Securities on Form 5 (“Form 5”), in each case filed with the SEC, including: the Form 3 filed by George John Schuller on March 19, 2024; and the Forms 4 filed by Pamela Butcher on March 13, 2024, March 18, 2024, June 17, 2024, September 16, 2024 and November 27, 2024, James Chapman on March 11, 2024, Paul Demzik on March 5, 2024, John Eaves on March 8, 2024, Patrick Kriegshauser on March 18, 2024, June 17, 2024, September 16, 2024 and November 27, 2024, Holly Koeppel on March 18, 2024, June 17, 2024, September 16, 2024 and November 27, 2024, Richard Navarre on March 18, 2024, June 17, 2024, September 16, 2024 and November 27, 2024, George John Schuller on March 21, 2024, Peifang Zhang on March 18, 2024, June 17, 2024, September 16, 2024 and November 27, 2024, John Ziegler on March 8, 2024, John Drexler on October 15, 2024, Rosemary Klein on October 15, 2024, Deck Slone on October 15, 2024 and Matthew Giljum on October 15, 2024. Information about the directors and executive officers of CONSOL, including a description of their direct or indirect interests, by security holdings or otherwise, is set forth in CONSOL’s proxy statement for its 2024 Annual Meeting of Stockholders, which was filed with the SEC on April 1, 2024, including under the headings “Board of Directors and Compensation Information,” “Executive Compensation Information” and “Beneficial Ownership of Securities.” To the extent holdings of CONSOL common stock by the directors and executive officers of CONSOL have changed from the amounts of CONSOL common stock held by such persons as reflected therein, such changes have been or will be reflected on Forms 3, Forms 4 or Forms 5, in each case filed with the SEC, including: the Forms 4 filed by James Brock on May 24, 2024 and July 1, 2024, John Mills on May 9, 2024, Cassandra Chia-Wei Pan on May 9, 2024, Valli Perera on May 9, 2024, Joseph Platt on May 9, 2024 and John Rothka on March 8, 2024. Other information regarding the participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, are contained in the registration statement and joint proxy statement/prospectus and may be contained in other relevant materials to be filed with the SEC regarding the proposed transaction when such materials become available. Investors and security holders should read the registration statement and joint proxy statement/prospectus carefully before making any voting or investment decisions. You may obtain free copies of any of the documents referenced herein from Arch or CONSOL using the sources indicated above.

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: January 3, 2025	Arch Resources, Inc.
Date: January 10, 2025	Arch Resources, Inc.
	By:	/s/ Rosemary L. Klein
		Rosemary L. Klein
		Senior Vice President—Law, General Counsel and Secretary

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