HECLA MINING CO/DE/

In connection with the recast described above, and to conform to the presentation adopted beginning with our Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 (the "Q2 2026 Form 10-Q"), filed August 4, 2026, we are also recasting the Income Statements in our 2025 Form 10-K and Q1 2026 Form 10-Q to remove the "Total Cost of Sales" and "Gross Profit" line items, which are not required disclosures under GAAP or SEC disclosure rules. We have also renamed the former line item "ramp-up and suspension costs" as "care and maintenance" costs to more accurately describe the nature of those expenses. We have also reclassified amounts in 2023 and 2024 in the Consolidated Statements of Operations and Comprehensive Income (Loss) and Note 5. Business Segments, Sales of Products and Significant Customers to conform with the 2025 presentation.

Exhibit 99.1 filed with this Form 8-K includes the following recast portions of our 2025 Form 10-K for all periods presented to reflect the presentation of Casa Berardi as a discontinued operation and, where applicable, changes to reportable segments, as well as changes to our Income Statement presentation:

Part I. Item 1. Business

Part I. Item 2. Properties

Part II. Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations

Part II. Item 8. Financial Statements and Supplementary Data

Exhibit 99.2 filed with this Form 8-K includes the following recast portions of our Q1 2026 Form 10-Q for all periods presented to reflect the changes to our Income Statement presentation (Items below are under Part I of the Q1 2026 Form 10-Q):

Item 1. Financial Statements

Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

Except as specifically set forth herein to disclose information related to the disposal of Hecla Quebec described above, to reflect the historical results of our Casa Berardi business as a discontinued operation and to conform our Income Statement presentation to our current presentation, no revisions have been made to our 2025 Form 10-K or Q1 2026 Form 10-Q to update for other information, developments or events that have occurred since such filings. This Form 8-K and related exhibits should be read in conjunction with our 2025 Form 10-K and Q1 2026 Form 10-Q and subsequent filings with the SEC, including Quarterly Reports on Form 10-Q for the periods ended

June 30, 2026 and Current Reports on Form 8-K. These subsequent SEC filings contain important information regarding events, risks, developments and updates affecting the Company and our expectations that have occurred since the filing of our 2025 Form 10-K and Q1 2026 Form 10-Q. The information contained herein is not an amendment to, or a restatement of our 2025 Form 10-K or Q1 2026 Form 10-Q. Unaffected items and unaffected portions of our 2025 Form 10-K and Q1 2026 Form 10-Q have not been repeated in, and are not amended or modified by this Form 8-K or related exhibits.

By virtue of this Current Report, the Company will be able to incorporate the updated information by reference into future registration statements or post effective amendments to existing registration statements.