Constellium (NYSE:CSTM) is back on investors radar after reporting higher second quarter and first half 2026 earnings, lifting its full year adjusted EBITDA and free cash flow targets on firm aerospace and automotive demand.

The earnings news comes after a strong run for Constellium’s stock, with the share price up 50.13% year to date and a very large 117.76% total shareholder return over the past year, even though the 90 day share price return declined 10.95%.

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After a 50% year to date surge and record guidance from Constellium, the real tension for investors is simple: Do the current earnings power and buybacks still leave enough upside to justify the risk from here?

Most Popular Narrative: 12.7% Undervalued

Constellium’s most followed valuation narrative pegs fair value at $34.00 per share, compared with the latest close at $29.68, which frames the recent rally in a different light.

Constellium matters now because the company has moved from turnaround narrative to tangible delivery. In 2025, shipments rose 4% to 1.5 million metric tons, revenue increased 15%, and adjusted EBITDA rose to $846 million, making 2025 its second-best year ever, according to the company. Q4 2025 was a record quarter, with $280 million of adjusted EBITDA and a swing to $113 million of net income from a loss in Q4 2024.

The core of this valuation story, according to HedgeY, focuses on how Constellium converts that level of EBITDA into recurring free cash flow, what happens to margins as recycling ramps, and how much of those cash flows are directed to buybacks versus debt reduction. The fair value reflects a specific earnings run rate and reinvestment path that are not apparent from the headline share price.

Result: Fair Value of $34.00 (UNDERVALUED)

However, Constellium’s story can still be knocked off course if automotive volumes remain weak for an extended period or if higher energy and metal costs squeeze margins.

Next Steps

With Constellium showing both potential upsides and clear areas of concern, it makes sense to move quickly and test the narrative against the numbers yourself. To see how the current mix of opportunities and risks lines up for you, take a closer look at the 4 key rewards and 3 important warning signs

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.