Sigma Lithium Corp. filed a Form 6-K on July 22, 2026, furnishing a press release dated the same day as Exhibit 99.1. The filing was made by the Canadian lithium producer as a foreign private issuer and was signed by Ana Cristina Cabral, the company’s Chief Executive Officer. The document itself does not include the text of the July 22 press release or describe the underlying corporate development it was intended to announce. As provided, the filing only establishes that Sigma Lithium submitted a current report for the month of July 2026 and incorporated a press release as an exhibit. No insider transaction, securities issuance, share repurchase, option grant, vesting event, financing, merger, asset sale, or other specific corporate action is disclosed in the available text. There are also no reported share counts, transaction prices, ownership changes, transaction codes, or board approvals described. The filing matters because Form 6-K is the mechanism foreign private issuers use to furnish material information to U.S. investors. However, without the contents of Exhibit 99.1, the specific news Sigma Lithium intended to report on July 22, 2026 cannot be determined from the provided document alone.