CENTURY ALUMINUM CO 8-K

What Happened
Century Aluminum Company announced its results of operations for the quarter ended March 31, 2026, via a press release dated May 7, 2026 (attached as Exhibit 99.1 to the 8-K). The company scheduled a follow-up earnings conference call and live webcast for Thursday, May 7, 2026, at 5:00 p.m. Eastern Time.

Key Details

• Press release reporting Q1 2026 results was issued May 7, 2026 and is attached as Exhibit 99.1.
• Earnings call/webcast: Thursday, May 7, 2026 at 5:00 p.m. ET; webcast available at www.centuryaluminum.com.
• Webcast registration: listeners should begin registration at least 10 minutes before the start; replay and presentation materials will be archived and available about two hours after the live call.
• Corporate filing note: the press release and related information are furnished (not “filed”) under the Exchange Act and are not automatically subject to Section 18 liabilities.
• Report signed May 7, 2026 by Peter Trpkovski, Executive VP & Chief Financial Officer (Principal Financial Officer).

Why It Matters
This 8-K informs investors that Century has released its quarterly operating results and is hosting a live call to discuss those results and answer questions—key events for assessing near-term performance and management commentary. The furnished (non-filed) status means the release is for disclosure and investor update purposes but isn’t incorporated into other filings unless explicitly referenced.