CSTM vs MEC vs ACA Stock Comparison

Constellium Se, Mayville Engineering Company and Arcosa Prices as of Oct 27, 2026 Peers: Industry group
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CSTM Constellium Se
$24.54 -1.5% 1M +45.6% 1Y
Market cap
$3.33B
P/E
6.1x
Revenue (TTM)
$9.58B
Div. yield
–
Metal Fabrication Industrials
6 wins
ACA Arcosa, Inc.
$149.18 +1.7% 1M +61.6% 1Y
Market cap
$7.33B
P/E
14.9x
Revenue (TTM)
$2.74B
Div. yield
0.13%
Metal Fabrication Industrials
5 wins

Head to Head

11 decided of 12

Constellium Se leads on 6 of the 12 questions below (Constellium Se 6, Arcosa 5). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCSTMMECACALeader
Larger companyMarket capitalisation $3.33B $351.90M $7.33B ACA
Cheaper on earningsLower P/E, profitable companies only 6.1x -18.2x 14.9x CSTM
Cheaper on forward earningsLower price / next fiscal year consensus EPS 5.9x 57.5x 33.6x CSTM
Faster revenue growthRevenue growth, trailing twelve months +25.9% +11.8% +9.7% CSTM
More profitableNet margin, trailing twelve months 5.7% -3.0% 17.9% ACA
Better return on capitalReturn on invested capital 25.6% -1.8% 6.5% CSTM
Less leveragedLower net debt / EBITDA 1.2x 3.9x 1.8x CSTM
Higher dividend yieldTrailing dividend yield — — 0.13% –
Better 1-year returnPrice return, last 12 months +45.6% -16.4% +61.6% ACA
Better 5-year returnAnnualised price return, 5 years +5.2%/yr -5.1%/yr +23.0%/yr ACA
Less volatileAnnualised volatility, 1 year 44.8% 54.8% 31.7% ACA
Higher overall scoreMean of the five percentile scores vs peers 74/100 28/100 56/100 CSTM

Percentile Scorecard

CSTMMECACA

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisCSTMMECACA
Valuation 97 #8 of 203 48 #107 of 203 50 #102 of 203
Growth 97 #6 of 188 11 #168 of 188 82 #34 of 188
Profitability 65 #64 of 183 23 #141 of 183 50 #92 of 183
Financial Health 19 #176 of 217 31 #150 of 217 58 #92 of 217
Shareholder Returns 90 #16 of 153 – 41 #90 of 153
Overall 74 28 56
  • CSTM ranked among 222 companies in Machinery
  • MEC ranked among 222 companies in Machinery
  • ACA ranked among 222 companies in Machinery

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodCSTMMECACASPY
1 month -1.5%-19.7%+1.7% -0.2%
3 months -15.6%-50.3%+2.9% +3.9%
6 months -21.0%-37.0%+24.1% +8.2%
Year to date +30.2%-26.3%+40.3% +12.9%
1 year +45.6%-16.4%+61.6% +12.3%
3 years +60.2%+28.6%+117.4% +87.4%
3 years, per year +17.0%+8.8%+29.6% +23.3%
5 years +28.8%-23.2%+181.9% +67.9%
5 years, per year +5.2%-5.1%+23.0% +10.9%
10 years +371.9%—— +261.1%
10 years, per year +16.8%—— +13.7%

Risk

MeasureCSTMMECACASPY
Volatility, 1Y 44.8%54.8%31.7% 12.7%
Downside volatility, 1Y 42.1%53.1%32.9% 12.7%
Beta vs S&P 500, 1Y 1.941.570.95 1.00
Return / volatility, 1Y 1.02-0.301.94 0.97
Max drawdown, 5Y -66.3%-66.7%-36.7% -25.4%
From 52-week high -32.1%-63.2%0.0% -1.2%
52-week high $36.15$37.54$149.18 $779.14
52-week low $14.75$12.73$92.25 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleCSTMMECACA
P/E now vs peer median 6.1xmedian 25.2x -18.2xmedian 25.2x 14.9xmedian 25.2x
P/S now vs peer median 0.3xmedian 1.9x 0.6xmedian 1.9x 2.7xmedian 1.9x
EV/EBITDA now vs peer median 3.4xmedian 14.0x 15.1xmedian 14.0x 15.2xmedian 14.0x
P/FCF now vs peer median 15.3xmedian 21.7x -77.0xmedian 21.7x 54.9xmedian 21.7x
P/B now vs peer median 2.7xmedian 2.3x 1.1xmedian 2.3x 2.5xmedian 2.3x
PEG now vs peer median 0.07median 1.32 0.38median 1.32 0.75median 1.32

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsCSTMMECACA
Revenue $9.58B $586.34M $2.74B
Gross profit $1.56B $53.52M $632.30M
Operating income $1.14B -$12.80M $322.70M
Net income $545.00M -$17.30M $491.40M
Free cash flow $218.00M -$4.57M $133.40M
R&D $53.00M – –
EPS (diluted) $3.89 $-0.76 $9.99
Cash & equivalents $163.00M $2.20M $432.10M
Total debt $1.92B $752.49M $1.44B
Shares (diluted) 140.15M 22.77M 49.20M
Enterprise value $2.79B $344.92M $6.31B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricCSTMMECACA
P/E 6.1x -18.2x 14.9x
P/FCF 15.3x -77.0x 54.9x
P/Operating cash flow 6.0x 25.3x 21.5x
P/S 0.3x 0.6x 2.7x
P/B 2.7x 1.1x 2.5x
P/Tangible book 2.8x 1.6x 2.7x
EV/EBITDA 3.4x 15.1x 15.2x
EV/EBIT 4.4x -37.1x 25.8x
EV/Revenue 0.5x 0.8x 3.0x
EV/FCF 23.3x -104.0x 62.4x
EV/Operating cash flow 9.2x 34.1x 24.4x
PEG (3Y EPS CAGR) 0.07 0.38 0.75

Growth

14 metrics
MetricCSTMMECACA
Revenue growth (1Y) 25.9% 11.8% 9.7%
Revenue CAGR (3Y) 6.3% 2.4% 7.0%
Gross profit growth (1Y) 66.2% -5.8% 20.7%
Gross profit CAGR (3Y) 21.4% -4.2% 14.2%
Operating income growth (1Y) 101.1% -142.1% 61.3%
Operating income CAGR (3Y) 27.0% -37.8% -5.6%
Net income growth (1Y) 1,457% -196.8% 433.0%
Net income CAGR (3Y) 19.3% -49.1% 20.2%
EPS growth (1Y) 1,629% -188.0% 430.8%
EPS CAGR (3Y) 85.0% -47.4% 19.8%
Operating cash flow growth (1Y) 84.9% -82.4% -23.1%
Operating cash flow CAGR (3Y) – -23.3% 16.1%
Free cash flow growth (1Y) 311.7% -106.7% -54.9%
Free cash flow CAGR (3Y) – 16.0% 54.7%

Profitability

14 metrics
MetricCSTMMECACA
Gross margin 16.3% 9.1% 23.0%
EBITDA margin 15.5% 5.4% 19.9%
Operating margin 11.9% -2.2% 11.8%
Pretax margin 8.1% -4.7% 8.4%
Net margin 5.7% -3.0% 17.9%
FCF margin 2.3% -0.8% 4.9%
Operating cash flow margin 5.8% 2.4% 12.4%
Return on equity 45.7% -6.2% 17.4%
Return on assets 9.1% -3.0% 9.5%
Return on invested capital 25.6% -1.8% 6.5%
Return on capital employed 31.2% -2.6% 6.9%
Asset turnover 1.6x 1.0x 0.5x
Cash conversion (OCF / net income) 1.0x -0.8x 0.7x
Stock comp / revenue – 0.6% 0.9%

Financial Health

11 metrics
MetricCSTMMECACA
Debt / assets 31.7% 21.4% 27.1%
Debt / equity 1.5x 0.4x 0.5x
Net debt / EBITDA 1.2x 3.9x 1.8x
Debt / FCF 8.8x -27.5x 10.8x
Liabilities / assets 79.3% 44.7% 43.7%
Equity / assets 20.7% 55.3% 56.3%
Interest coverage 10.5x -0.9x 3.3x
Current ratio 1.4x 1.7x 3.1x
Quick ratio 0.6x 0.9x 2.2x
Cash ratio 0.1x 0.0x 1.0x
Altman Z-score 2.96 1.96 3.18

Shareholder Returns

7 metrics
MetricCSTMMECACA
Dividend yield – – 0.1%
Net buyback yield 3.4% – 0.2%
Shareholder yield 3.4% – 0.4%
Payout ratio (earnings) – – 2.0%
Payout ratio (FCF) – – 7.4%
Dividend growth (1Y) – – 1.0%
Dividend CAGR (3Y) – – 1.0%

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusCSTMMECACA
Forward P/E 5.9xFY2026 57.5xFY2026 33.6xFY2026
EPS, next fiscal year $4.18FY2026 $0.24FY2026 $4.44FY2026
EPS growth, next FY +237.1%FY2026 -22.6%FY2026 -0.7%FY2026
EPS growth, the year after -32.3% +354.2% +7.0%
Revenue, next fiscal year $10.71BFY2026 $666.72MFY2026 $2.45BFY2026
Revenue growth, next FY +26.8%FY2026 +22.0%FY2026 -14.9%FY2026
Revenue growth, the year after +1.3% +4.5% +12.5%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCSTMMECACA
Held by institutions 88.6% 83.1% 91.8%
Institutions holding 384 156 426
Change in shares held, QoQ -4.5% +47.1% -1.1%
Institutions buying 255 98 230
Institutions selling 108 40 114
Buyers to sellers 2.36 2.45 2.02

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

CSTMMECACA
CSTM 1.00 0.35 0.33
MEC 0.35 1.00 0.23
ACA 0.33 0.23 1.00

Add a Peer

Largest companies in the same industry

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Frequently Asked Questions

Which is bigger, CSTM, MEC and ACA?

Arcosa (ACA) is the largest by market capitalisation: Constellium Se (CSTM) $3.33B, Mayville Engineering Company (MEC) $351.90M, Arcosa (ACA) $7.33B.

Which stock is cheaper, CSTM, MEC and ACA?

Constellium Se (CSTM) trades on the lowest price-to-earnings ratio (Constellium Se (CSTM) 6.1x, Mayville Engineering Company (MEC) -18.2x, Arcosa (ACA) 14.9x). On next year's consensus earnings, Constellium Se (CSTM) is cheapest (Constellium Se (CSTM) 5.9x, Mayville Engineering Company (MEC) 57.5x, Arcosa (ACA) 33.6x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Constellium Se (CSTM) grew revenue fastest over the trailing twelve months: Constellium Se (CSTM) +25.9%, Mayville Engineering Company (MEC) +11.8%, Arcosa (ACA) +9.7%.

Which company is more profitable?

Arcosa (ACA) has the highest net margin (Constellium Se (CSTM) 5.7%, Mayville Engineering Company (MEC) -3.0%, Arcosa (ACA) 17.9%). On return on invested capital, Constellium Se (CSTM) leads (Constellium Se (CSTM) 25.6%, Mayville Engineering Company (MEC) -1.8%, Arcosa (ACA) 6.5%).

Which stock has performed better?

Over the past year Arcosa (ACA) returned the most: Constellium Se (CSTM) +45.6%, Mayville Engineering Company (MEC) -16.4%, Arcosa (ACA) +61.6%. Over five years, Arcosa (ACA) compounded fastest (Constellium Se (CSTM) +5.2%/yr, Mayville Engineering Company (MEC) -5.1%/yr, Arcosa (ACA) +23.0%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Arcosa (ACA) 0.13%. Constellium Se (CSTM) and Mayville Engineering Company (MEC) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Arcosa (ACA) has been the steadiest (Constellium Se (CSTM) 44.8%, Mayville Engineering Company (MEC) 54.8%, Arcosa (ACA) 31.7%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, CSTM, MEC and ACA?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Constellium Se (CSTM) leads on 6. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.