Hycroft details Hycroft Mine advancement, restart study

Q: What did Hycroft Mining (HYMC) announce in the September 21, 2026 8-K?

Hycroft Mining announced a technical update on advancing the Hycroft Mine toward production and introduced a refreshed brand identity, redesigned website, and updated corporate presentation, all aimed at better communicating its strategy and project progress.

Q: What technical work is Hycroft Mining (HYMC) doing at Brimstone and Vortex?

Hycroft is finalizing internal assessments of potential underground development options for the high-grade Brimstone and Vortex systems, supported by RESPEC’s conceptual mine plan and studies of an exploration decline for underground drill access and future integration into mining.

Q: How is Hycroft Mining (HYMC) evaluating processing options for sulfide material?

Hycroft has completed a roasting metallurgical test program and is finalizing a trade-off analysis comparing roasting and pressure oxidation. Roasting may provide an additional revenue stream through production and sale of sulfuric acid for lithium, copper, and fertilizer production.

Q: Is Hycroft Mining (HYMC) considering restarting heap leach operations?

Yes. Hycroft is evaluating a potential heap leach restart, supported by a reverse circulation drill program initiated in late 2025 to define oxide and transition material. A metallurgical test program is underway, after which it will determine next steps for this restart opportunity.

Q: What exploration drilling plans does Hycroft Mining (HYMC) describe?

Hycroft is conducting a 2025–2026 Exploration Drill Program focused on expanding and advancing the high-grade Brimstone and Vortex silver systems and expects two additional core rigs in the fourth quarter to accelerate drilling on these and other targets.

Hycroft outlines technical work on underground development, processing options, and a potential heap leach restart while refreshing its brand and investor materials.

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

8-K

Rhea-AI Filing Summary

Hycroft Mining Holding Corporation (HYMC) reports a technical update on advancing the Hycroft Mine toward renewed production and unveils a refreshed brand identity, redesigned website, and updated corporate presentation. The company is evaluating multiple pathways to unlock shareholder value in the second half of 2026.

Hycroft is progressing underground development planning for the high-grade Brimstone and Vortex systems, supported by RESPEC’s conceptual mine plan work and Hatch’s evaluation of processing alternatives for a potential underground operation. A metallurgical test program at Hazen is informing a trade-off study between pressure oxidation and roasting, with roasting potentially adding sulfuric acid sales as an additional revenue stream. The company is also assessing a restart of heap leach operations, supported by a 2025 reverse circulation drill program and ongoing metallurgical testing, and expects two additional core rigs in the fourth quarter to accelerate drilling at Vortex, Brimstone, and other targets.

Filing Explained

Hycroft’s mine update remains at the study-and-testing stage, with no completed production plan or restart disclosed.

Hycroft furnished a technical update and corporate presentation under Item 7.01; the disclosed work remains in planning, testing, and evaluation, so the filing does not establish a completed production path or heap-leach restart.

Form 8-K reports specified material events, but these materials are furnished rather than filed and are not incorporated into other filings unless expressly referenced.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Press release date: September 21, 2026 Second half of 2026: H2 2026 2025–2026 Exploration Drill Program: 2025–2026 +2 more

5 metrics

Press release date September 21, 2026 Date Hycroft announced the technical update and refreshed brand identity

Second half of 2026 H2 2026 Period during which the company is evaluating multiple pathways to unlock shareholder value

2025–2026 Exploration Drill Program 2025–2026 Exploration drill program to expand and advance Brimstone and Vortex high-grade systems

Two additional core rigs 2 core rigs Expected in the fourth quarter to accelerate drilling on Vortex, Brimstone and other targets

Year heap leach drill program initiated Late 2025 Reverse circulation drill program started to define oxide and transition material for potential heap leach restart

Key Terms

pressure oxidation, roasting, heap leach operations, exploration decline, +2 more

6 terms

pressure oxidation technical

"trade-off study results between pressure oxidation and roasting for the broader sulfide resource"

Pressure oxidation is a high-pressure, high-temperature chemical process used to break down tough mineral ores so valuable metals can be recovered more easily, like using a pressure cooker to soften food before extracting ingredients. It matters to investors because it can substantially increase metal recovery and thus revenue, but also raises capital, operating and environmental costs and technical risk, affecting a mining project's profitability and timeline.

roasting technical

"comparing the economic benefit of both roasting and pressure oxidation"

heap leach operations technical

"assessing the potential restart of heap leach operations"

Heap leach operations are a low-cost mining method where crushed ore is piled into a lined pad and a liquid solution is trickled through the pile to dissolve and collect valuable metals like gold, copper or silver. For investors, this matters because heap leaching can significantly lower production costs and speed up cash flow, but it also concentrates environmental, regulatory and closure risks tied to chemical use, water management and long-term site cleanup.

exploration decline technical

"locations and configurations for an exploration decline that could provide underground drill access"

sulfide mineralization technical

"advancing to the next phase of operations for processing sulfide mineralization"

Sulfide mineralization is when rocks contain concentrated grains or layers of metal-bearing sulfide minerals—think of metal “chips” embedded in the rock like chocolate chips in a cookie. It matters to investors because these sulfide minerals often host valuable metals (copper, nickel, zinc, gold, etc.), so their presence can indicate a potential ore deposit, influence how much a project is worth, and affect extraction costs and environmental risks.

Tier-1 mining jurisdiction technical

"Hycroft Mine, among the world’s largest precious metals deposits, located in Nevada, a Tier-1 mining jurisdiction"

A tier-1 mining jurisdiction is a country or region widely regarded as low-risk for mining projects because it offers stable politics, clear laws, reliable permitting, good infrastructure and low corruption. For investors, it means lower chances of costly delays, legal disputes or expropriation, so projects there are more likely to get financing and reach production — like building in a well-regulated neighborhood versus a risky backlot.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Hycroft Mining (HYMC) announce in the September 21, 2026 8-K?

Hycroft Mining announced a technical update on advancing the Hycroft Mine toward production and introduced a refreshed brand identity, redesigned website, and updated corporate presentation, all aimed at better communicating its strategy and project progress.

What technical work is Hycroft Mining (HYMC) doing at Brimstone and Vortex?

Hycroft is finalizing internal assessments of potential underground development options for the high-grade Brimstone and Vortex systems, supported by RESPEC’s conceptual mine plan and studies of an exploration decline for underground drill access and future integration into mining.

How is Hycroft Mining (HYMC) evaluating processing options for sulfide material?

Hycroft has completed a roasting metallurgical test program and is finalizing a trade-off analysis comparing roasting and pressure oxidation. Roasting may provide an additional revenue stream through production and sale of sulfuric acid for lithium, copper, and fertilizer production.

Is Hycroft Mining (HYMC) considering restarting heap leach operations?

Yes. Hycroft is evaluating a potential heap leach restart, supported by a reverse circulation drill program initiated in late 2025 to define oxide and transition material. A metallurgical test program is underway, after which it will determine next steps for this restart opportunity.

What exploration drilling plans does Hycroft Mining (HYMC) describe?

Hycroft is conducting a 2025–2026 Exploration Drill Program focused on expanding and advancing the high-grade Brimstone and Vortex silver systems and expects two additional core rigs in the fourth quarter to accelerate drilling on these and other targets.

What is the purpose of Hycroft Mining’s (HYMC) refreshed brand and website?

The refreshed brand identity, redesigned website, and updated corporate presentation aim to provide enhanced access to information on Hycroft’s strategy, technical programs, exploration results, and corporate developments, reflecting the company’s transformation and evolving project opportunities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/21/2026 - 05:12 PM Accepted by SEC EDGAR 09/21/2026 - 05:11 PM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): September 21, 2026

HYCROFT MINING HOLDING CORPORATION

(Exact name of registrant as specified in its charter)

Delaware

001-38387

82-2657796

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

P.O. Box 3030 Winnemucca, Nevada		89446
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (775) 304-0260

(Former name or former address, if changed since last report.)

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 (see General Instruction A.2. below):

☐	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
Class A common stock, par value $0.0001 per share		HYMC		The Nasdaq Stock Market LLC

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 7.01. Regulation FD Disclosure.

New Release

On September 21, 2026, Hycroft Mining Holding Corporation (the “Company”) issued a press release announcing a technical update and a refreshed brand identity. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

Corporate Presentation

On September 21, 2026, the Company furnished its updated corporate presentation to its website at www.hycroftmining.com. A copy of the updated corporate presentation is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K.

In accordance with General Instruction B.2 of Form 8-K, the information set forth in (i) this Item 7.01, (ii) the news release and (iii) the updated corporate presentation is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number		Description
99.1		Press Release dated September 21, 2026
99.2		Corporate Presentation posted September 21, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

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 thereunto duly authorized.

Date: September 21, 2026	Hycroft Mining Holding Corporation

	By:	/s/ Rebecca A. Jennings
		Rebecca A. Jennings
		Executive Vice President and General Counsel

Exhibit 99.1

Hycroft Provides Project Update

Unveils Refreshed Brand Identity to Reflect Its Evolution

September 21, 2026 – Winnemucca, NV – Hycroft Mining Holding Corporation (Nasdaq: HYMC) (“Hycroft” or the “Company”), a U.S.-based gold and silver exploration and development company that owns the Hycroft Mine, today provides an update on the technical initiatives underway to advance the mine toward production. The Company also unveils a refreshed brand identity, redesigned website and updated corporate presentation that reflect Hycroft’s transformation and the significant opportunities being advanced across the asset.

The Company is continuing to evaluate multiple potential pathways to unlock shareholder value in the second half of 2026. These efforts are supported by a senior leadership team with extensive operational expertise and a strengthened Board of Directors with substantial experience in mining operations and project development. The updated website, available today at www.hycroftmining.com, provides investors and all stakeholders with enhanced access to information on the Company’s strategy, technical programs, exploration results and corporate developments.

Diane Garrett, Executive Chairman and CEO, commented: “We are progressing underground development planning at Brimstone and Vortex, completing trade-off study results between pressure oxidation and roasting for the broader sulfide resource and assessing the potential restart of heap leach operations. Additionally, we are awaiting two additional core rigs and expect to have them in the fourth quarter to accelerate drilling on Vortex and Brimstone and test other highly prospective targets across the site. Our focus remains on defining the optimal path to production that delivers the highest economic value from the asset to our shareholders.

We have also strengthened our Board and management team with highly experienced mining leaders who bring the operating, technical, financial and strategic capabilities needed to support this next phase of growth and our updated website and corporate materials provide a more effective platform to communicate the progress being made across the asset.”

Technical Update

Assessment of High-Grade Underground Development Potential

The Company is finalizing its internal assessment of potential underground development options for the high-grade Brimstone and Vortex systems. As previously announced, the Company engaged RESPEC Company LLC (“RESPEC”) to evaluate underground mining alternatives and develop a conceptual mine plan. RESPEC is also supporting an assessment of potential locations and configurations for an exploration decline that could provide underground drill access to more effectively and efficiently explore and expand the high-grade systems while also considering its potential integration into a future underground mining operation.

Hatch Ltd. (“Hatch”) has also been engaged to evaluate processing alternatives for recovering silver and gold from a potential underground operation. A metallurgical test program is underway at Hazen Research Inc. (“Hazen”) to further characterize the metallurgical response of the high-grade Brimstone and Vortex material and support this evaluation.

In parallel, the Company will continue the engineering, environmental, and permitting work required to advance the project along the optimal production path.

Metallurgical Test Work on Roasting

The Company has completed the roasting metallurgical test program and is now finalizing a trade-off analysis comparing the economic benefit of both roasting and pressure oxidation. While both processing options are conventional methods, roasting has the potential for an additional revenue stream through the production and sale of sulfuric acid, which is a critical input for lithium, copper, and fertilizer production.

Assessment of a Heap Leach Restart

The Company continues to evaluate the potential to restart heap leach operations at Hycroft. A reverse circulation drill program, initiated in late 2025, further defined the quantity, location and characteristics of oxide and transition material. A metallurgical test program is underway, after which the Company will evaluate the appropriate next steps for advancing the restart opportunity.

www.hycroftmining.com

About Hycroft Mining Holding Corporation

Hycroft Mining Holding Corporation is a US-based gold and silver company exploring and developing the Hycroft Mine, among the world’s largest precious metals deposits, located in Nevada, a Tier-1 mining jurisdiction. With a long history of heap leach operations, Hycroft is advancing to the next phase of operations for processing sulfide mineralization. In addition, Hycroft is engaged in a robust exploration drill program (2025-2026 Exploration Drill Program) to expand and advance the two new high-grade silver systems Brimstone and Vortex. These discoveries represent a significant value driver for the Hycroft Mine.

For Further Information

Investor Relations:

E: info@hycroftmining.com

P: 775-245-0564

Media:

E: media@hycroftmining.com

P: 775-245-0564

www.hycroftmining.com

Cautionary Note Regarding Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, included in this press release and in public statements by our officers or representatives that address activities, events or developments that we expect or anticipate will or may occur in the future are forward-looking statements. These include, but are not limited to, statements regarding future business strategy, plans and goals, competitive strengths, the advancement and development of the Hycroft Mine, the results and implications of metallurgical analysis and test work, and the expansion and growth of our business.

Forward-looking statements are often identified by future or conditional words such as “estimate,” “plan,” “anticipate,” “expect,” “intend,” “believe,” “target,” “budget,” “may,” “can,” “will,” “would,” “could,” “should,” “seeks,” “scheduled to” and similar words or expressions but the absence of these words does not mean that a statement is not forward-looking. Forward-looking statements are based on current expectations, estimates and projections that involve a number of risks and uncertainties, which could cause actual results to differ materially from those reflected in the statements. The risks include, but are not limited to: (i) risks related to changes in our operations at the Hycroft Mine, including risks associated with the cessation of mining operations at the Hycroft Mine; uncertainties concerning estimates of mineral resources; risks related to the lack of a completed feasibility study; risks related to metallurgical test work and process development; risks related to obtaining and maintaining necessary permits and regulatory approvals; and risks related to our ability to re-establish commercially feasible mining and processing operations; and (ii) industry-related risks, including fluctuations in the price of gold and silver; the commercial success of, and risks related to, our exploration and development activities; uncertainties and risks related to our reliance on contractors and consultants; and the availability and cost of equipment, supplies, energy or reagents.

These and other risks may cause actual results to differ materially from those expressed or implied by the forward-looking statements, and the occurrence of one or more of these events or circumstances, alone or in combination with others, may have a material adverse effect on our business, cash flows, financial condition and results of operations. Please see the “Risk Factors” outlined in our Annual Report on Form 10-K for the year ended December 31, 2025, and in other reports filed with the SEC, for more information about these and other risks. You are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date of this press release. The Company undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.