AEIS vs FSS vs APTV Stock Comparison

Advanced Energy Industries, Federal Signal and Aptiv Prices as of Oct 28, 2026 Peers: Industry group
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FSS Federal Signal Corp /De/
$113.43 -1.4% 1M -9.9% 1Y
Market cap
$7.08B
P/E
24.8x
Revenue (TTM)
$2.45B
Div. yield
0.01%
Heavy Equipment Industrials
6 wins
APTV Aptiv PLC
$44.08 +1.0% 1M -49.1% 1Y
Market cap
$9.46B
P/E
43.0x
Revenue (TTM)
$18.73B
Div. yield
–
Electrical Equipment Industrials
1 win

Head to Head

11 decided of 12

Federal Signal leads on 6 of the 12 questions below (Federal Signal 6, Advanced Energy Industries 4, Aptiv 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAEISFSSAPTVLeader
Larger companyMarket capitalisation $9.47B $7.08B $9.46B AEIS
Cheaper on earningsLower P/E, profitable companies only 43.2x 24.8x 43.0x FSS
Cheaper on forward earningsLower price / next fiscal year consensus EPS 22.6x 23.1x 8.0x APTV
Faster revenue growthRevenue growth, trailing twelve months +24.6% +24.0% +5.3% AEIS
More profitableNet margin, trailing twelve months 10.8% 11.7% 1.2% FSS
Better return on capitalReturn on invested capital 10.3% 15.3% 2.6% FSS
Less leveragedLower net debt / EBITDA -0.4x 0.8x 2.3x AEIS
Higher dividend yieldTrailing dividend yield 0.00% 0.01% 0.00% –
Better 1-year returnPrice return, last 12 months +18.4% -9.9% -49.1% AEIS
Better 5-year returnAnnualised price return, 5 years +21.4%/yr +21.5%/yr -23.9%/yr FSS
Less volatileAnnualised volatility, 1 year 65.2% 35.0% 44.6% FSS
Higher overall scoreMean of the five percentile scores vs peers 45/100 76/100 55/100 FSS

Percentile Scorecard

AEISFSSAPTV

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

AxisAEISFSSAPTV
Valuation 12 #178 of 203 54 #95 of 203 95 #11 of 203
Growth 77 #45 of 188 94 #13 of 188 14 #162 of 188
Profitability 54 #85 of 184 91 #18 of 184 36 #118 of 184
Financial Health 61 #85 of 217 76 #53 of 217 33 #145 of 217
Shareholder Returns 20 #122 of 153 66 #53 of 153 99 #3 of 153
Overall 45 76 55
  • AEIS ranked among 222 companies in Machinery
  • FSS ranked among 222 companies in Machinery
  • APTV ranked among 222 companies in Machinery

Price Performance

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

Returns

PeriodAEISFSSAPTVSPY
1 month -12.8%-1.4%+1.0% +0.9%
3 months -4.0%+1.3%-24.0% +5.9%
6 months -32.9%-6.6%-24.4% +8.5%
Year to date +15.7%+4.5%-42.1% +13.3%
1 year +18.4%-9.9%-49.1% +12.4%
3 years +175.9%+98.1%-48.8% +88.1%
3 years, per year +40.3%+25.6%-20.0% +23.5%
5 years +163.9%+165.0%-74.5% +68.2%
5 years, per year +21.4%+21.5%-23.9% +11.0%
10 years +411.8%+834.3%-31.9% +263.4%
10 years, per year +17.7%+25.0%-3.8% +13.8%

Risk

MeasureAEISFSSAPTVSPY
Volatility, 1Y 65.2%35.0%44.6% 12.7%
Downside volatility, 1Y 67.7%35.9%48.4% 12.7%
Beta vs S&P 500, 1Y 2.741.281.16 1.00
Return / volatility, 1Y 0.28-0.28-1.10 0.98
Max drawdown, 5Y -44.3%-33.3%-76.0% -25.4%
From 52-week high -37.7%-15.2%-50.3% -0.9%
52-week high $389.05$133.73$88.67 $779.14
52-week low $188.88$104.77$42.69 $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.

MultipleAEISFSSAPTV
P/E now vs peer median 43.0xmedian 25.4x 24.2xmedian 25.4x 42.4xmedian 25.4x
P/S now vs peer median 4.8xmedian 1.9x 2.8xmedian 1.9x 0.5xmedian 1.9x
EV/EBITDA now vs peer median 28.5xmedian 14.3x 15.1xmedian 14.3x 6.9xmedian 14.3x
P/FCF now vs peer median 110.8xmedian 21.8x 20.4xmedian 21.8x 11.2xmedian 21.8x
P/B now vs peer median 6.7xmedian 2.2x 4.6xmedian 2.2x 1.0xmedian 2.2x
PEG now vs peer median 11.70median 1.41 0.85median 1.41 -1.33median 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 monthsAEISFSSAPTV
Revenue $2.04B $2.45B $18.73B
Gross profit $800.50M $714.00M $3.68B
Operating income $269.20M $395.40M $995.00M
Net income $219.40M $285.40M $231.00M
Free cash flow $87.50M $339.20M $817.00M
R&D $246.60M – –
EPS (diluted) $5.19 $4.64 $1.04
Cash & equivalents $1.40B $62.80M $761.00M
Total debt $3.30B $453.60M $5.35B
Shares (diluted) 42.30M 61.50M 212.10M
Enterprise value $5.83B $6.83B $2.31B

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
MetricAEISFSSAPTV
P/E 43.0x 24.2x 42.4x
P/FCF 110.8x 20.4x 11.2x
P/Operating cash flow 40.6x 18.6x 6.2x
P/S 4.8x 2.8x 0.5x
P/B 6.7x 4.6x 1.0x
P/Tangible book 7.2x 6.2x 1.3x
EV/EBITDA 28.5x 15.1x 6.9x
EV/EBIT 35.5x 18.5x 13.8x
EV/Revenue 4.7x 3.0x 0.7x
EV/FCF 109.3x 21.6x 16.9x
EV/Operating cash flow 40.0x 19.6x 9.3x
PEG (3Y EPS CAGR) 11.70 0.85 -1.33

Growth

14 metrics
MetricAEISFSSAPTV
Revenue growth (1Y) 24.6% 24.0% 5.3%
Revenue CAGR (3Y) 3.3% 16.1% -1.0%
Gross profit growth (1Y) 32.8% 24.5% 4.6%
Gross profit CAGR (3Y) 6.0% 22.1% 4.4%
Operating income growth (1Y) 216.7% 27.8% -43.3%
Operating income CAGR (3Y) 9.4% 28.8% -15.8%
Net income growth (1Y) 161.5% 28.8% -77.6%
Net income CAGR (3Y) 7.6% 28.6% -38.3%
EPS growth (1Y) 133.8% 28.4% -77.7%
EPS CAGR (3Y) 3.7% 28.6% -31.9%
Operating cash flow growth (1Y) 23.3% 45.6% -36.6%
Operating cash flow CAGR (3Y) 7.6% 59.2% -7.8%
Free cash flow growth (1Y) -30.8% 49.8% -52.9%
Free cash flow CAGR (3Y) -11.1% 73.3% -7.0%

Profitability

14 metrics
MetricAEISFSSAPTV
Gross margin 39.3% 29.2% 19.6%
EBITDA margin 16.5% 19.8% 10.7%
Operating margin 13.2% 16.2% 5.3%
Pretax margin 12.1% 15.2% 4.1%
Net margin 10.8% 11.7% 1.2%
FCF margin 4.3% 13.9% 4.4%
Operating cash flow margin 11.7% 15.2% 7.9%
Return on equity 15.4% 19.4% 2.6%
Return on assets 7.3% 11.7% 1.1%
Return on invested capital 10.3% 15.3% 2.6%
Return on capital employed 11.3% 18.5% 5.3%
Asset turnover 0.7x 1.0x 0.9x
Cash conversion (OCF / net income) 1.1x 1.3x 6.4x
Stock comp / revenue 3.4% 0.6% 0.7%

Financial Health

11 metrics
MetricAEISFSSAPTV
Debt / assets 36.9% 18.6% 29.8%
Debt / equity 0.9x 0.3x 0.6x
Net debt / EBITDA -0.4x 0.8x 2.3x
Debt / FCF 14.4x 1.3x 6.6x
Liabilities / assets 57.5% 38.2% 51.4%
Equity / assets 42.5% 61.8% 48.6%
Interest coverage 17.1x 19.3x 3.0x
Current ratio 3.8x 2.7x 2.0x
Quick ratio 2.8x 1.1x 1.1x
Cash ratio 2.2x 0.2x 0.3x
Altman Z-score 4.93 7.10 2.46

Shareholder Returns

7 metrics
MetricAEISFSSAPTV
Dividend yield 0.2% 0.5% –
Net buyback yield 0.1% 0.0% 7.8%
Shareholder yield 0.2% 0.5% 7.8%
Payout ratio (earnings) – 12.6% –
Payout ratio (FCF) – 10.6% –
Dividend growth (1Y) – 13.6% –
Dividend CAGR (3Y) – 17.0% –

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.

ConsensusAEISFSSAPTV
Forward P/E 22.6xFY2026 23.1xFY2026 8.0xFY2026
EPS, next fiscal year $10.74FY2026 $4.92FY2026 $5.49FY2026
EPS growth, next FY +67.6%FY2026 +16.3%FY2026 -17.1%FY2026
EPS growth, the year after +37.5% +10.0% +13.5%
Revenue, next fiscal year $2.55BFY2026 $2.79BFY2026 $13.02BFY2026
Revenue growth, next FY +41.5%FY2026 +28.1%FY2026 -36.2%FY2026
Revenue growth, the year after +25.2% -5.3% +4.0%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAEISFSSAPTV
Held by institutions 100.0% 100.0% 98.6%
Institutions holding 678 474 659
Change in shares held, QoQ -2.0% +3.9% +9.2%
Institutions buying 388 249 330
Institutions selling 218 152 260
Buyers to sellers 1.78 1.64 1.27

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.

AEISFSSAPTV
AEIS 1.00 0.39 0.19
FSS 0.39 1.00 0.17
APTV 0.19 0.17 1.00

Add a Peer

Largest companies in the same industry

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Frequently Asked Questions

Which is bigger, AEIS, FSS and APTV?

Advanced Energy Industries (AEIS) is the largest by market capitalisation: Advanced Energy Industries (AEIS) $9.47B, Federal Signal (FSS) $7.08B, Aptiv (APTV) $9.46B.

Which stock is cheaper, AEIS, FSS and APTV?

Federal Signal (FSS) trades on the lowest price-to-earnings ratio (Advanced Energy Industries (AEIS) 43.2x, Federal Signal (FSS) 24.8x, Aptiv (APTV) 43.0x). On next year's consensus earnings, Aptiv (APTV) is cheapest (Advanced Energy Industries (AEIS) 22.6x, Federal Signal (FSS) 23.1x, Aptiv (APTV) 8.0x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Advanced Energy Industries (AEIS) grew revenue fastest over the trailing twelve months: Advanced Energy Industries (AEIS) +24.6%, Federal Signal (FSS) +24.0%, Aptiv (APTV) +5.3%.

Which company is more profitable?

Federal Signal (FSS) has the highest net margin (Advanced Energy Industries (AEIS) 10.8%, Federal Signal (FSS) 11.7%, Aptiv (APTV) 1.2%). On return on invested capital, Federal Signal (FSS) leads (Advanced Energy Industries (AEIS) 10.3%, Federal Signal (FSS) 15.3%, Aptiv (APTV) 2.6%).

Which stock has performed better?

Over the past year Advanced Energy Industries (AEIS) returned the most: Advanced Energy Industries (AEIS) +18.4%, Federal Signal (FSS) -9.9%, Aptiv (APTV) -49.1%. Over five years, Federal Signal (FSS) compounded fastest (Advanced Energy Industries (AEIS) +21.4%/yr, Federal Signal (FSS) +21.5%/yr, Aptiv (APTV) -23.9%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Advanced Energy Industries (AEIS) 0.00%, Federal Signal (FSS) 0.01%, Aptiv (APTV) 0.00%. Advanced Energy Industries (AEIS) and Aptiv (APTV) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Federal Signal (FSS) has been the steadiest (Advanced Energy Industries (AEIS) 65.2%, Federal Signal (FSS) 35.0%, Aptiv (APTV) 44.6%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AEIS, FSS and APTV?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Federal Signal (FSS) 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.