CENX at a glance
CENTURY ALUMINUM CO (CENX, SEC CIK 949157) filed its latest 10-K annual report on March 3, 2026, a 10-Q quarterly report on August 6, 2026, an 8-K current report on August 6, 2026 and Form 4 insider filings as recently as June 17, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended December 31, 2025 (FY2025), CENTURY ALUMINUM CO (CENX) reported revenue of $2.5 billion (up 13.9% from FY2024) and net income of $41.8 million. Diluted EPS was $0.42.
- As of June 30, 2026, 35 institutional investment managers tracked by SignalX reported holding CENTURY ALUMINUM CO (CENX) shares worth $1.8 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Trpkovski Peter A on March 25, 2026 of 16,739 shares at $50.51 per share.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $2.5B
- +13.9% vs prior year
- Insiders · 90 days
- 0 buys · 0 sells
- No open-market trades
- 13F holders
- 35 funds
- $1.8B · +1 vs prior quarter
- Latest 8-K
- Aug 6, 2026
- Item 2.02
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Dec 31, 2025
Business Overview
- Core business model: Primary aluminum production with significant electric power cost exposure
- Emphasis on managing market-based power agreements expiring 2026-2036, including LME-linked variable and fixed power rates
- Increased focus on power price risk mitigation via financial instruments and natural hedges through alumina and power contracts indexed to LME aluminum prices
- Annual electrical power usage 11.63 million MWh, $15.9 million annual cost impact per $1/MWh power price change
- Derivative commodity contract liabilities rose substantially to $66.0 million from $4.4 million year-over-year, reflecting notable risk management activity
Risk Factors
- Regulatory risk: One Big Beautiful Bill Act 2025 phases out Section 45X tax credit starting 2031, reducing credit 25% yearly until 2034
- Macroeconomic risk: Power supply contracts extend through 2036, exposing to energy price volatility and long-term fixed obligations
- Operational risk: $45 million investment planned to restart Mt. Holly operations in 2026, execution risks on restart and integration
- Competitive risk: Unstated direct competitor risk but large capital expenditures ($170-$180 million in 2026) indicate pressure to maintain tech and capacity
- Financial risk: Intercompany non-current loan receivable of $509.4 million from Non-Guarantor Subsidiaries may impact liquidity and consolidation
Management Discussion & Analysis
- Revenue impact from Hawesville facility sale: $200 million cash received plus 6.8% equity in Terawulf affiliate
- Noted loss of approx. 84,000 tonnes alumina production in 2023 at Jamalco due to equipment failure, impacting gross margin by $30.4M
- Operating disruptions: Grundartangi smelter potline idled for ~7 weeks reducing production by two-thirds; full resumption expected April 2026
- Positive financial impact from US tariffs boost Midwest premium; tariffs increased to 50% effective June 2025
- Capital allocation: Proceeds from Hawesville sale directed to restart Mt. Holly potline and new Inola smelter project with EGA (40% stake), supported by up to $500 million DOE funding
- Forward outlook: New smelter construction to start late 2026 pending power agreement and JV finalization; advanced manufacturing tax credit under Section 45X recognized, subject to future regulatory adjustments
AI summary of the CENX 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Jun 30, 2026
Management Discussion & Analysis
- Gross margin 30.3% in Q2, based on gross profit $227.9M and net sales $752.1M
- Best segment: U.S. aluminum shipments 95,057 tonnes, sales $572.3M
- Worst segment: Iceland shipments 35,575 tonnes, sales $121.2M, versus 81,222 tonnes and $233.7M YoY
- Cash $343.4M versus $134.2M at December 31; operating cash flow $236.0M versus $80.2M YoY six-month period
Risk Factors
- No material changes to 2025 Form 10-K risk factors
- Regulatory and compliance exposure carried forward through SEC filings and reporting obligations
- Operational and market risks remain those identified in the 2025 Form 10-K
- Financial risks, including liquidity, debt maturities, currency exposure, and customer concentration, unchanged from the 2025 Form 10-K
AI summary of the CENX 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item 2.02: Results of Operations and Financial Condition
- Q2 2026 results covered quarter ended June 30, 2026
- Press release in Exhibit 99.1 contains the substantive financial results
Item EX-99.1: Item EX-99.1
- Q2 net sales rose to $752.1M and shipments to 130,632 tonnes, supported by higher aluminum prices and expanded production
- Adjusted EBITDA attributable to Century increased to $326.9M from $231.4M sequentially, signaling stronger underlying operating performance
Item 5.07: Submission of Matters to a Vote of Security Holders
- 2026 annual meeting achieved 86.39% participation, confirming quorum and meaningful shareholder engagement
- All seven director nominees elected to one-year terms expiring at the 2027 annual meeting
Item 2.02: Results of Operations and Financial Condition
- Q1 2026 results covered quarter ended March 31, 2026
- Earnings press release attached as Exhibit 99.1, containing operating and financial details
AI summaries of CENX 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for CENX
Don't miss the next CENX filing
- Alerts as it files. A push when CENX files an 8-K or an insider trades.
- Fund moves. Which tracked funds opened, added or cut CENX, by share count.
- Ask anything. An AI agent that reads every CENX filing and answers with sources.
CENX alerts on your phone. Follow it in the SignalX Android app.
Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Bush Jennifer Mary | A | Jun 15, 2026 | 2,172 | - |
| Berntzen Jarl | A | Jun 15, 2026 | 2,172 | - |
| GLASSER ERROL | A | Jun 15, 2026 | 2,172 | - |
| Michelmore Andrew G | A | Jun 15, 2026 | 2,172 | - |
| Michelmore Andrew G | F | Jun 15, 2026 | 652 | $54.55 |
| Olivier Tamla A | A | Jun 15, 2026 | 2,172 | - |
| Trpkovski Peter A | Sell | Mar 25, 2026 | 16,739 | $50.51 |
| Gary Jesse E | Sell | Mar 16, 2026 | 150,000 | $55.47 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $2.2B | $2.5B |
| Gross Profit | - | $185.0M | $256.4M |
| Operating Income | - | $121.4M | $158.1M |
| Net Income | - | $336.8M | $41.8M |
| Gross Margin | - | 8.3% | 10.1% |
| Op. Margin | - | 5.5% | 6.3% |
| Net Margin | - | 15.2% | 1.7% |
| Balance Sheet | |||
| Total Assets | $1.8B | $1.9B | $2.3B |
| Equity | - | $694.4M | $805.6M |
| ROE | - | 48.5% | 5.2% |
| Per Share | |||
| EPS | - | $3.27 | $0.42 |
| Cash Flow | |||
| Operating CF | - | -$24.6M | $185.0M |
| CapEx | $95.0M | $82.3M | $100.2M |
Source: XBRL data in CENTURY ALUMINUM CO (CENX)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate CENX share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 35 | $1.80B |
| Q1 2026 | 34 | $2.24B |
| Q4 2025 | 30 | $1.29B |
| Q3 2025 | 30 | $964.6M |
| Q2 2025 | 30 | $574.7M |
| Q1 2025 | 27 | $376.1M |
| Q4 2024 | 23 | $338.6M |
| Q3 2024 | 20 | $196.7M |
- BlackRock+1.29M (+14%)
- State Street Corp+875.2K (+19%)
- Goldman Sachs Group+670.1K (+177%)
- Vanguard Portfolio Management LLC+532.2K (+13%)
- Vanguard Capital Management LLC+386.4K (+15%)
- Citadel Advisors LLC−1.03M (-78%)
- Millennium Management−871.4K (-44%)
- FMR LLC (Fidelity)−699.7K (-26%)
- D.E. Shaw & Co−637.6K (-44%)
- Bridgewater Associates LP−258.6K (-35%)
- Two Sigma Investments+27.6K
- Mangrove Partners+4.7K
- Marex Group plc−4.6K
Source: 13F-HR filings on SEC EDGAR (aggregated from 229 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
CENX filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
8-K current reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| SC 13G | Aug 7, 2026 | - | - | |
| 8-K | Aug 6, 2026 | - | Analysis | - |
| 10-Q | Aug 6, 2026 | Jun 30, 2026 | Analysis | |
| 8-K | Jun 17, 2026 | - | Analysis | - |
| 4 | Jun 17, 2026 | - | - | - |
| 4 | Jun 17, 2026 | - | - | - |
| 4 | Jun 17, 2026 | - | - | - |
| 4 | Jun 17, 2026 | - | - | - |
| 4 | Jun 17, 2026 | - | - | - |
| 8-K | May 7, 2026 | - | Analysis | |
| 10-Q | May 7, 2026 | Mar 31, 2026 | Analysis | |
| 4 | Mar 27, 2026 | - | - | - |
| 4 | Mar 17, 2026 | - | - | - |
| 4 | Mar 13, 2026 | - | - | - |
| 4 | Mar 13, 2026 | - | - | - |
| 4 | Mar 6, 2026 | - | - | - |
| 4 | Mar 4, 2026 | - | - | - |
| 4 | Mar 4, 2026 | - | - | - |
| 10-K | Mar 3, 2026 | Dec 31, 2025 | Analysis | |
| 4 | Mar 3, 2026 | - | - | - |
| 8-K | Mar 3, 2026 | - | Analysis | - |
| 4 | Feb 27, 2026 | - | - | - |
| 4 | Feb 25, 2026 | - | - | - |
| 8-K | Feb 19, 2026 | - | - | |
| 4 | Feb 11, 2026 | - | - |
Related Materials companies
- AA · Alcoa CorpPrimary Production of Aluminum
- AEM · Agnico Eagle Mines LtdGold and Silver Ores
- APD · Air ProductsIndustrial Inorganic Chemicals
- ALB · Albemarle CorporationPlastic Materials, Synth Resins & Nonvulcan Elastomers
- AMCR · AmcorMiscellaneous Manufacturing Industries
- ABAT · AMERICAN BATTERY TECHNOLOGY CoMining & Quarrying of Nonmetallic Minerals (No Fuels)
- AMWD · AMERICAN WOODMARK CORPMillwood, Veneer, Plywood, & Structural Wood Members
- APOG · APOGEE ENTERPRISES, INC.Glass Products, Made of Purchased Glass
CENX SEC filings: frequently asked questions
Which institutions hold CENX stock?
As of June 30, 2026, the largest CENTURY ALUMINUM CO (CENX) holders among the 13F filers tracked by SignalX were BlackRock ($474.1 million), State Street Corp ($255.0 million), Vanguard Portfolio Management LLC ($219.6 million), Vanguard Capital Management LLC ($136.8 million), Invesco Ltd ($111.2 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What was CENX's revenue in fiscal year 2025?
For the fiscal year ended December 31, 2025 (FY2025), CENTURY ALUMINUM CO (CENX) reported revenue of $2.5 billion (up 13.9% from FY2024) and net income of $41.8 million. Diluted EPS was $0.42. The figures come from the XBRL data in the 10-K.
What are the main risks in CENX's latest 10-K?
In the 10-K filed March 3, 2026, CENTURY ALUMINUM CO (CENX) flagged: Regulatory risk: One Big Beautiful Bill Act 2025 phases out Section 45X tax credit starting 2031, reducing credit 25% yearly until 2034. Macroeconomic risk: Power supply contracts extend through 2036, exposing to energy price volatility and long-term fixed obligations. (AI summary of the Risk Factors section.)
What did CENX report in its latest 8-K?
CENTURY ALUMINUM CO (CENX) filed an 8-K on August 6, 2026 reporting Item 2.02 (Results of Operations and Financial Condition). Q2 2026 results covered quarter ended June 30, 2026.
What are the latest CENX SEC filings?
CENTURY ALUMINUM CO (CENX) filed its latest 10-K annual report on March 3, 2026, a 10-Q quarterly report on August 6, 2026, an 8-K current report on August 6, 2026 and a Form 4 insider filing on June 17, 2026.
What is CENX's SEC CIK number?
CENTURY ALUMINUM CO (CENX)'s SEC Central Index Key (CIK) is 949157. EDGAR lists every CENX filing under that number.
Ask anything about CENX
The research agent reads CENX's filings, financials, insider trades and 13F holders, then answers with sources.