Aluminum Stocks in the US

The largest Aluminum stocks in the US by market value are Alcoa Corporation ($10.7B), Century Aluminum Company ($3.2B) and Constellium SE ($3.1B), at prices of 4 Nov 2026.

• Alcoa Corporation: $40.58 | market value $10.7B | P/E 7.3
• Century Aluminum Company: $32.80 | market value $3.2B | P/E 7.6
• Constellium SE: $22.71 | market value $3.1B | P/E 8
• Kaiser Aluminum Corporation: $110.74 | market value $1.8B | P/E 10.7

Share price | market value | P/E, biggest first. Prices and market values as of 4 Nov 2026; ratios as in the score list below.

4 Aluminum companies in the Aluminum industry group (every listed company) have a page on Sector Alpha, by market value as of 4 November 2026, and all 4 are listed below, largest first. The largest is Alcoa Corporation ($10.7 billion) and the smallest with a market value is Kaiser Aluminum Corporation.

Download all 4 Aluminum companies (CSV)

The line below covers up to 5.2 years and opens on the 5Y view; the buttons cut it shorter. Over the last two years (104 weeks) this industry is 19% ahead of S&P 500. Earnings across its companies grew 123% on average over the last four reported quarters.

Price and the fundamentals both up. 0 of 4 companies ahead of S&P 500 by 5% or more over three months.

Not ahead of S&P 500 on the three-month view this week; 0 of the 4 companies in the industry index above their 200-day average (no change from four weeks earlier); 0 of those 4 ahead of S&P 500 by 5% or more over three months (no change from four weeks earlier); earnings rising at 4 of the 4 that report earnings.

Not ahead of S&P 500, not building participation, not giving any back. Earnings confirming, 4 of 4 members have higher trailing twelve-month earnings than a year ago.

Both lines start at 200 in the same week, so the gap between them tells the story: the industry line is an equal-weighted index of its 4 companies. The bars underneath are trailing 12-month earnings per share, one bar per reported quarter, each member set to 100 at the start and the industry taking the middle value, so a price line pulling away from flat bars means the market is paying more for the same earnings. A bar turns grey when that figure is lower than the quarter before. The rules are fixed and the same everywhere on this site: ahead by 5% or more over three months, or behind by 20% or more over a year while earnings grew 20% or more. Hover or tap any point to read both values and the gap.

Aluminum has done better than the S&P 500 by 5.9% over the last 52 weeks. Over 13 weeks the gap is a shortfall of 28.7%. Constellium SE is the strongest against the sector itself at +10.7%.

Aluminum has done better than the S&P 500 by 5.9% over 52 weeks, but is 28.7% behind over the last 13 weeks. 0 of 4 companies we track are beating the S&P 500 on relative strength (how a share price has done against the index over recent months), and 1 of 4 is ahead of the industry itself.

A score that ranks each company against the others in its industry. The four parts shown always add up to the total: Growth & earnings (35), Capital efficiency (25), Valuation (20), and Relative strength (20). Missing or old evidence affects only its own part, never as a hidden adjustment.

Constellium SE has the strongest current balance of earnings trajectory, business quality, valuation and price confirmation, with 78.1% evidence confidence.

Constellium SE has the strongest one-year price move in Aluminum at +43.5%. It also leads on relative strength against the S&P 500, at −17.4%. 0 of 4 companies we track are ahead of the index on that measure. Every line covers 314 weekly closes through 4 November 2026.

Price and relative strength

Price · same starting point: Every company, the sector's own index and S&P 500 all start level on the left edge of the window, so only the distance between the lines counts: the highest line has risen the most since then, and the chart at the top of this page is drawn the same way. It opens on one year; the buttons beside it stretch that to three or five.

RS vs S&P 500: How far ahead of or behind S&P 500 each company has been running, measured against its own recent average of that comparison, so the flat line at zero IS S&P 500: above it the company is beating the market, below it the market is beating the company. It opens on one year.

RS vs sector: The same measure taken against Aluminum itself instead of the whole market, so the flat line at zero is the sector: above it the company is beating its own peers, which is the sharper test of the two. It opens on one year.

Biggest one-year moves

Strongest against S&P 500

Strongest against the sector itself

Alcoa Corporation has the highest Revenue among the 4 Aluminum companies compared here, at $14,312 million. Constellium SE is next at $9,576 million. Kaiser Aluminum Corporation has the highest Revenue growth at 40.5%, so level and change sit with different companies. 4 of 4 companies report a comparable reading, the latest through Sep 2026.

What the numbers say: Alcoa Corporation is the largest at $14,312 million, 49.5% ahead of Constellium SE. Kaiser Aluminum Corporation's growth is 40.5% from a $4,508 million base, with 20 reported quarters out of the last 20. Fast growth from a smaller base is not yet the same as proven size.

What this means: Alcoa Corporation is the size to compare against; Kaiser Aluminum Corporation is the one growing fastest. The faster grower has to keep that growth and turn it into margin and returns before it counts as more than a fast start.

This conclusion weakens if: Alcoa Corporation's growth falls below Kaiser Aluminum Corporation's for two consecutive comparable reports while operating margin also compresses.

Revenue is compared on a common reported-currency basis. Growth is year-on-year, so seasonality does not masquerade as progress.

Revenue · company comparison

Revenue · largest

Revenue growth · fastest growers

All-company data · latest reported quarter

In every all-company table on this page, each figure is the company’s latest single reported quarter. The rankings above them use trailing-twelve-month or current-market values, so a company can legitimately show a different number in each.

Revenue shows both size and speed. A large company can absorb shocks and pay for wide distribution; faster growth can mean market-share gains, new capacity or stronger demand. The best sign is usually growth that lasts without hurting margins and returns.

Century Aluminum Company has the highest OPM among the 4 Aluminum companies compared here, at 28.1%. Alcoa Corporation is next at 16.2%. The same company also has the highest Margin change, at +25.2 percentage points. 4 of 4 companies report a comparable reading, the latest through Jun 2026. Its OPM series carries 19 reported observations across the 20-quarter window.

What the numbers say: Century Aluminum Company leads both opm at 28.1% and margin change at +25.2 percentage points.

What this means: Century Aluminum Company sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current margin change signal.

Operating margin compares operating profit with revenue. Improvement is measured in percentage points, not percentage growth.

Operating margin · company comparison

OPM · highest

Margin change · fastest expanders

All-company data · latest reported quarter

Alcoa Corporation has the highest Net profit among the 4 Aluminum companies compared here, at $1,526 million. Century Aluminum Company is next at $603 million. Constellium SE has the highest Profit growth at the 100% top of the scoring scale, so level and change sit with different companies. Its Net profit series carries 20 reported observations across the 20-quarter window.

What the numbers say: Alcoa Corporation earns the most, $1,526 million of profit over the last 12 months, 153.1% above Century Aluminum Company. Constellium SE shows at least 100% on the scoring scale (1603.1% in full) growth from a profit base of $545 million. A fast rate from a small base matters less than a large profit that keeps coming.

What this means: Alcoa Corporation sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current profit growth signal.

Net profit is the residual after operating costs, interest and tax. Growth off a loss or near-zero base is excluded from the fastest-grower rank.

Net profit · company comparison

Net profit · largest

Profit growth · fastest growers

All-company data · latest reported quarter

Constellium SE has the highest ROCE among the 4 Aluminum companies compared here, at 20.5%. Century Aluminum Company is next at 16.4%. The same company also has the highest ROCE change, at +13.7 percentage points. 4 of 4 companies report a comparable reading, the latest through Jun 2026. Its ROCE series carries 19 reported observations across the 20-quarter window.

What the numbers say: Constellium SE leads ROCE at 20.5%, 4.1 percentage points above Century Aluminum Company. A high return reported once may be one good year; a high return reported year after year shows a lasting business.

What this means: Constellium SE sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current roce change signal.

ROCE asks how much operating return the business earns on the capital employed. Direction matters, but a single exceptional year should not be mistaken for durability.

Return on capital · company comparison

ROCE · highest

ROCE change · fastest improvers

All-company data · latest reported quarter

Constellium SE has the lowest PEG among the 4 Aluminum companies compared here, at 0.2×. Alcoa Corporation is next at 0.22×. Alcoa Corporation has the lowest P/E at 7.26×, so level and change sit with different companies. 3 of 4 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: Constellium SE has the lowest comparable PEG at 0.2×, 9.1% below Alcoa Corporation. That would need today's multiple, the company's own history and steady growth to agree.

What this means: A low valuation is a reason to look closer at the business, not a conclusion on its own.

This conclusion weakens if: The next two comparable reports reverse the current p/e signal.

PEG is shown only when earnings are positive and three-year EPS growth is between 5% and 60%. It is worked out the same way every time, as the P/E on the last 12 months of reported earnings divided by that growth rate, never on expected earnings. On Indian companies it is shown only where the two data feeds agreed. Where any of that fails the ratio is left out rather than printed: a P/E divided by a loss, or by growth measured off a tiny base, is a number that looks precise and means nothing.

Valuation · company comparison

PEG · lowest PEG

P/E · lowest P/E

All-company data · latest reported quarter

This Aluminum comparison names 4 specific ways its own evidence can mislead, all listed below. All 4 companies here report on comparable dates, so no rank carries a stale marker. A high growth rate can still come from a very small starting figure.

Keep these limits visible

• A high growth rate can come from a very small starting figure. The page keeps level and change separate for that reason.
• A high ROCE can be temporary, or look high because the capital base is small. It is best read beside margin, cash flow and how much is spent back on the business.
• The 4-Factor Sector Score ranks published data only. Management quality, upcoming events and risks are not part of it.
• An “all companies” line chart preserves completeness, but rank changes should be checked against reporting dates before drawing a conclusion.

This comparison is built from the reported filings of 4 Aluminum companies, normalized to a common $ scale and a shared quarter axis of up to 20 quarters each. Fundamentals run through Sep 2026 and market data through 4 November 2026.

These 21 answers restate the Aluminum comparison above in question form. Every one is computed from the same 4 companies and the same reported filings as the rankings and charts, current through Sep 2026. Price and relative-strength answers run through 4 November 2026. Nothing here is estimated, and none of it is a recommendation.