Century Aluminum (CENX) was down about 3% Tuesday, April 28, 2026, with traders keying off a fresh SEC proxy filing cycle that reiterates the company’s recent financial restatement tied to Jamalco accounting and consolidation methodology. The DEF 14A notes the company began mailing proxy materials on or about April 28 and references the previously disclosed restatement to reflect a shift from proportionate consolidation to full consolidation for certain Jamalco net assets, which can change headline balance-sheet and income-statement presentation even if underlying economics are unchanged. (sec.gov)

The dip in CENX also came as base metals were broadly softer in overnight trading, a backdrop that can quickly translate into day-to-day volatility for primary aluminum producers. Shanghai Metals Market flagged broad declines across metals in its April 28 overnight market update, reinforcing a risk-off tone for the complex. (news.metal.com)

Restatements often reprice near-term sentiment because they can affect comparability, reported leverage metrics, and investor confidence, even when they are driven by presentation and consolidation judgments rather than cash impacts. With CENX up sharply over the past year, traders have been quick to fade incremental headline risk, and a proxy package that re-surfaces restatement language can act as a catalyst for profit-taking on an otherwise commodities-driven name. (sec.gov)

Investors will monitor (1) any follow-on SEC filings tied to the annual meeting process, (2) aluminum price direction and physical-market signals, and (3) whether the market begins to treat the restatement as “fully digested” and shifts back to fundamentals like realized pricing, energy costs, and restart/ramp execution across Century’s asset base.