CSTM vs IIIN vs MEC Stock Comparison

Constellium Se, Insteel Industries and Mayville Engineering Company Prices as of Oct 28, 2026 Peers: Industry group
CSTM Constellium Se
$24.44 -0.8% 1M +44.5% 1Y
Market cap
$3.29B
P/E
5.7x
Revenue (TTM)
$10.05B
Div. yield
–
Metal Fabrication Industrials
10 wins
IIIN Insteel Industries Inc
$28.31 -3.3% 1M -8.3% 1Y
Market cap
$548.03M
P/E
18.6x
Revenue (TTM)
$739.51M
Div. yield
3.96%
Metal Fabrication Industrials
1 win

Head to Head

11 decided of 12

Constellium Se leads on 10 of the 12 questions below (Constellium Se 10, Insteel Industries 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCSTMIIINMECLeader
Larger companyMarket capitalisation $3.29B $548.03M $376.64M CSTM
Cheaper on earningsLower P/E, profitable companies only 5.7x 18.6x -19.4x CSTM
Cheaper on forward earningsLower price / next fiscal year consensus EPS 5.8x 13.8x 61.5x CSTM
Faster revenue growthRevenue growth, trailing twelve months +26.1% +14.2% +11.8% CSTM
More profitableNet margin, trailing twelve months 5.7% — -3.0% CSTM
Better return on capitalReturn on invested capital 26.9% — -1.8% CSTM
Less leveragedLower net debt / EBITDA 1.1x — 3.9x CSTM
Higher dividend yieldTrailing dividend yield — 3.96% — –
Better 1-year returnPrice return, last 12 months +44.5% -8.3% -11.5% CSTM
Better 5-year returnAnnualised price return, 5 years +5.8%/yr -7.0%/yr -3.6%/yr CSTM
Less volatileAnnualised volatility, 1 year 44.8% 41.4% 55.2% IIIN
Higher overall scoreMean of the five percentile scores vs peers 75/100 68/100 28/100 CSTM

Percentile Scorecard

CSTMIIINMEC

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

AxisCSTMIIINMEC
Valuation 98 #6 of 203 85 #32 of 203 47 #108 of 203
Growth 100 #1 of 188 32 #128 of 188 11 #167 of 188
Profitability 66 #64 of 184 62 #70 of 184 23 #142 of 184
Financial Health 21 #172 of 217 – 32 #148 of 217
Shareholder Returns 90 #16 of 153 95 #9 of 153 –
Overall 75 68 28
  • CSTM ranked among 222 companies in Machinery
  • IIIN ranked among 222 companies in Machinery
  • MEC ranked among 222 companies in Machinery

Price Performance

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

Returns

PeriodCSTMIIINMECSPY
1 month -0.8%-3.3%-12.2% +0.9%
3 months -11.4%-7.3%-41.7% +5.9%
6 months -24.2%+10.4%-32.3% +8.5%
Year to date +29.7%-10.6%-21.1% +13.3%
1 year +44.5%-8.3%-11.5% +12.4%
3 years +59.5%+4.9%+37.7% +88.1%
3 years, per year +16.9%+1.6%+11.2% +23.5%
5 years +32.8%-30.4%-16.8% +68.2%
5 years, per year +5.8%-7.0%-3.6% +11.0%
10 years +365.5%+7.6%— +263.4%
10 years, per year +16.6%+0.7%— +13.8%

Risk

MeasureCSTMIIINMECSPY
Volatility, 1Y 44.8%41.4%55.2% 12.7%
Downside volatility, 1Y 42.0%51.1%53.1% 12.7%
Beta vs S&P 500, 1Y 1.930.981.58 1.00
Return / volatility, 1Y 0.99-0.20-0.21 0.98
Max drawdown, 5Y -66.3%-49.9%-66.7% -25.4%
From 52-week high -32.4%-25.7%-60.7% -0.9%
52-week high $36.15$38.11$37.54 $779.14
52-week low $14.75$24.48$12.73 $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.

MultipleCSTMIIINMEC
P/E now vs peer median 5.7xmedian 25.4x 18.6xmedian 25.4x -19.4xmedian 25.4x
P/S now vs peer median 0.3xmedian 1.9x 0.7xmedian 1.9x 0.6xmedian 1.9x
EV/EBITDA now vs peer median 3.2xmedian 14.3x —median 14.3x 15.8xmedian 14.3x
P/FCF now vs peer median 10.3xmedian 21.8x -58.5xmedian 21.8x -82.4xmedian 21.8x
P/B now vs peer median 2.5xmedian 2.2x 1.4xmedian 2.2x 1.2xmedian 2.2x
PEG now vs peer median —median 1.41 -6.38median 1.41 0.41median 1.41

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 monthsCSTMIIINMEC
Revenue $10.05B $739.51M $586.34M
Gross profit $1.61B $75.68M $53.52M
Operating income $1.20B – -$12.80M
Net income $576.00M $29.55M -$17.30M
Free cash flow $319.00M – -$4.57M
R&D $53.00M – –
EPS (diluted) $4.13 $1.52 $-0.76
Cash & equivalents $158.00M $37.48M $2.20M
Total debt $1.82B – $752.49M
Shares (diluted) 138.99M 19.49M 22.77M
Enterprise value $2.71B $548.03M $369.65M

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
MetricCSTMIIINMEC
P/E 5.7x 18.6x -19.4x
P/FCF 10.3x -58.5x -82.4x
P/Operating cash flow 5.2x 15.1x 27.0x
P/S 0.3x 0.7x 0.6x
P/B 2.5x 1.4x 1.2x
P/Tangible book 2.6x 1.5x 1.7x
EV/EBITDA 3.2x – 15.8x
EV/EBIT 4.1x – -39.1x
EV/Revenue 0.5x 0.7x 0.9x
EV/FCF 15.5x – -109.4x
EV/Operating cash flow 7.8x 15.1x 35.9x
PEG (3Y EPS CAGR) – -6.38 0.41

Growth

14 metrics
MetricCSTMIIINMEC
Revenue growth (1Y) 26.1% 14.2% 11.8%
Revenue CAGR (3Y) – 4.4% 2.4%
Gross profit growth (1Y) 54.0% -19.0% -5.8%
Gross profit CAGR (3Y) – 5.0% -4.2%
Operating income growth (1Y) 82.1% – -142.1%
Operating income CAGR (3Y) – – -37.8%
Net income growth (1Y) 400.9% -28.0% -196.8%
Net income CAGR (3Y) – -3.0% -49.1%
EPS growth (1Y) 413.6% -27.7% -188.0%
EPS CAGR (3Y) – -2.9% -47.4%
Operating cash flow growth (1Y) 92.2% 33.5% -82.4%
Operating cash flow CAGR (3Y) – -36.6% -23.3%
Free cash flow growth (1Y) 897.5% – -106.7%
Free cash flow CAGR (3Y) – – 16.0%

Profitability

14 metrics
MetricCSTMIIINMEC
Gross margin 16.1% – 9.1%
EBITDA margin 15.3% – 5.4%
Operating margin 11.9% – -2.2%
Pretax margin 8.1% – -4.7%
Net margin 5.7% – -3.0%
FCF margin 3.2% – -0.8%
Operating cash flow margin 6.3% 4.9% 2.4%
Return on equity 44.4% 7.9% -6.2%
Return on assets 9.7% 6.2% -3.0%
Return on invested capital 26.9% – -1.8%
Return on capital employed 31.0% – -2.6%
Asset turnover 1.7x 1.5x 1.0x
Cash conversion (OCF / net income) 1.1x 1.2x -0.8x
Stock comp / revenue – 0.5% 0.6%

Financial Health

11 metrics
MetricCSTMIIINMEC
Debt / assets 31.0% – 21.4%
Debt / equity 1.4x – 0.4x
Net debt / EBITDA 1.1x – 3.9x
Debt / FCF 5.7x – -27.5x
Liabilities / assets 77.1% – 44.7%
Equity / assets 22.9% 79.0% 55.3%
Interest coverage 11.0x – -0.9x
Current ratio 1.5x 3.7x 1.7x
Quick ratio 0.6x – 0.9x
Cash ratio 0.1x – 0.0x
Altman Z-score 3.22 – 2.02

Shareholder Returns

7 metrics
MetricCSTMIIINMEC
Dividend yield – 4.0% –
Net buyback yield 3.6% – –
Shareholder yield 3.6% 4.0% –
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

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.

ConsensusCSTMIIINMEC
Forward P/E 5.8xFY2026 13.8xFY2027 61.5xFY2026
EPS, next fiscal year $4.18FY2026 $2.05FY2027 $0.24FY2026
EPS growth, next FY +237.1%FY2026 +35.8%FY2027 -22.6%FY2026
EPS growth, the year after -32.3% +7.8% +354.2%
Revenue, next fiscal year $10.71BFY2026 $759.46MFY2027 $666.72MFY2026
Revenue growth, next FY +26.8%FY2026 +2.7%FY2027 +22.0%FY2026
Revenue growth, the year after +1.3% +4.4% +4.5%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCSTMIIINMEC
Held by institutions 88.6% 82.1% 83.1%
Institutions holding 384 187 156
Change in shares held, QoQ -4.5% +0.9% +47.1%
Institutions buying 255 122 98
Institutions selling 108 48 40
Buyers to sellers 2.36 2.54 2.45

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.

CSTMIIINMEC
CSTM 1.00 0.32 0.35
IIIN 0.32 1.00 0.25
MEC 0.35 0.25 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, CSTM, IIIN and MEC?

Constellium Se (CSTM) is the largest by market capitalisation: Constellium Se (CSTM) $3.29B, Insteel Industries (IIIN) $548.03M, Mayville Engineering Company (MEC) $376.64M.

Which stock is cheaper, CSTM, IIIN and MEC?

Constellium Se (CSTM) trades on the lowest price-to-earnings ratio (Constellium Se (CSTM) 5.7x, Insteel Industries (IIIN) 18.6x, Mayville Engineering Company (MEC) -19.4x). On next year's consensus earnings, Constellium Se (CSTM) is cheapest (Constellium Se (CSTM) 5.8x, Insteel Industries (IIIN) 13.8x, Mayville Engineering Company (MEC) 61.5x). 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) +26.1%, Insteel Industries (IIIN) +14.2%, Mayville Engineering Company (MEC) +11.8%.

Which company is more profitable?

Constellium Se (CSTM) has the highest net margin (Constellium Se (CSTM) 5.7%, Mayville Engineering Company (MEC) -3.0%). On return on invested capital, Constellium Se (CSTM) leads (Constellium Se (CSTM) 26.9%, Mayville Engineering Company (MEC) -1.8%).

Which stock has performed better?

Over the past year Constellium Se (CSTM) returned the most: Constellium Se (CSTM) +44.5%, Insteel Industries (IIIN) -8.3%, Mayville Engineering Company (MEC) -11.5%. Over five years, Constellium Se (CSTM) compounded fastest (Constellium Se (CSTM) +5.8%/yr, Insteel Industries (IIIN) -7.0%/yr, Mayville Engineering Company (MEC) -3.6%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Insteel Industries (IIIN) 3.96%. Constellium Se (CSTM) and Mayville Engineering Company (MEC) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Insteel Industries (IIIN) has been the steadiest (Constellium Se (CSTM) 44.8%, Insteel Industries (IIIN) 41.4%, Mayville Engineering Company (MEC) 55.2%). Volatility measures how widely the price swings, not the risk of the business.

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

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 10. 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.