Aecom (ACM) P/E Ratio History
Deep ValueTrading at 18.0x · 5th percentile of 5-year range · Significant discount to historical valuation · Data 2007–2026
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P/E Ratio Analysis
As of September 23, 2026, Aecom (ACM) trades at a price-to-earnings ratio of 18.0x, with a stock price of $75.84 and trailing twelve-month earnings per share of $3.91.
The current P/E is 57% below its 5-year average of 42.3x. Over the past five years, ACM's P/E has ranged from a low of 17.5x to a high of 115.5x, placing the current valuation at the 5th percentile of its historical range.
Compared to the Industrials sector median P/E of 27.5x, ACM trades at a 35% discount to its sector peers. The sector includes 397 companies with P/E ratios ranging from 0.0x to 193.8x.
Relative to the broader market, ACM trades at a notable discount to the S&P 500 median P/E of 26.6x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our ACM DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
ACM Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ACM P/E vs Peers
Engineering and environmental consulting peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $17B | 61.0 | - | -62% | |
| $101B | 98.8 | 5.73 | +13% | |
| $22B | 53.7 | 18.10 | +146% | |
| $17B | 58.3 | 1.32 | +13% | |
| $5B | 11.9Lowest | - | +15% | |
| $9B | 38.1 | 4.70 | -24% | |
| $4B | 16.5 | 0.90 | +52% | |
| $12B | 42.7 | 0.78 | +21% | |
| $5B | 44.8 | 2.68 | +311%Best | |
| $67B | 18.2 | 0.59Best | +10% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ACM Historical P/E Data (2007–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | - | $84.79 | $4.16 | 20.4x | -51% |
| FY2026 Q1 | Jan 02 2026 | $96.40 | $3.85 | 25.0x | -40% |
| FY2025 Q4 | - | $130.47 | $4.54 | 28.7x | -31% |
| FY2025 Q3 | Jun 30 2025 | $112.86 | $4.92 | 22.9x | -45% |
| FY2025 Q2 | Mar 31 2025 | $92.73 | $4.59 | 20.2x | -52% |
| FY2025 Q1 | - | $106.82 | $3.52 | 30.3x | -27% |
| FY2024 Q4 | Sep 30 2024 | $103.27 | $2.96 | 34.9x | -16% |
| FY2024 Q3 | Jun 30 2024 | $88.14 | $1.86 | 47.4x | +13% |
| FY2024 Q1 | Dec 31 2023 | $92.43 | $0.80 | 115.5x | +177% |
| FY2023 Q4 | Sep 30 2023 | $83.04 | $0.74 | 112.2x | +169% |
| FY2023 Q3 | Jun 30 2023 | $84.69 | $1.31 | 64.6x | +55% |
| FY2023 Q2 | Mar 31 2023 | $84.32 | $3.00 | 28.1x | -33% |
| FY2023 Q1 | Dec 31 2022 | $84.93 | $2.39 | 35.5x | -15% |
| FY2022 Q4 | Sep 30 2022 | $68.37 | $2.19 | 31.2x | -25% |
| FY2022 Q3 | - | $65.22 | $2.10 | 31.1x | -26% |
| FY2022 Q2 | - | $76.81 | $1.46 | 52.6x | +26% |
| FY2022 Q1 | Dec 31 2021 | $77.35 | $1.43 | 54.1x | +30% |
| FY2021 Q4 | - | $63.15 | $1.17 | 54.0x | +29% |
| FY2019 Q3 | Jun 28 2019 | $37.85 | $1.85 | 20.5x | -51% |
| FY2019 Q2 | Mar 29 2019 | $29.67 | $1.70 | 17.5x | -58% |
| FY2019 Q1 | Dec 28 2018 | $26.25 | $0.46 | 57.1x | +37% |
| FY2018 Q4 | Sep 30 2018 | $32.66 | $0.83 | 39.3x | -6% |
| FY2018 Q3 | Jun 29 2018 | $33.03 | $0.86 | 38.4x | -8% |
| FY2018 Q2 | Mar 30 2018 | $35.63 | $1.13 | 31.5x | -24% |
| FY2018 Q1 | Dec 29 2017 | $37.15 | $2.53 | 14.7x | -65% |
| FY2017 Q4 | Sep 30 2017 | $36.81 | $2.14 | 17.2x | -59% |
| FY2017 Q3 | Jun 30 2017 | $32.33 | $1.64 | 19.7x | -53% |
| FY2017 Q2 | Mar 31 2017 | $35.59 | $1.43 | 24.9x | -40% |
| FY2017 Q1 | Dec 30 2016 | $36.36 | $1.05 | 34.6x | -17% |
| FY2016 Q4 | Sep 30 2016 | $29.73 | $0.62 | 48.0x | +15% |
| FY2016 Q3 | Jul 01 2016 | $31.61 | $0.58 | 54.5x | +31% |
| FY2016 Q2 | Apr 01 2016 | $30.81 | $0.04 | 770.3x | +1745% |
| FY2015 Q2 | Apr 03 2015 | $31.08 | $0.61 | 50.8x | +22% |
| FY2015 Q1 | Jan 02 2015 | $30.35 | $1.02 | 29.8x | -29% |
| FY2014 Q4 | - | $33.75 | $2.33 | 14.5x | -65% |
| FY2014 Q3 | Jun 30 2014 | $32.20 | $2.46 | 13.1x | -69% |
| FY2014 Q2 | Mar 31 2014 | $32.17 | $2.46 | 13.1x | -69% |
| FY2014 Q1 | - | $29.43 | $2.58 | 11.4x | -73% |
| FY2013 Q4 | Sep 30 2013 | $31.27 | $2.36 | 13.3x | -68% |
| FY2012 Q3 | Jun 30 2012 | $16.45 | $2.24 | 7.3x | -82% |
| FY2012 Q2 | Mar 31 2012 | $22.37 | $2.23 | 10.0x | -76% |
| FY2012 Q1 | Dec 31 2011 | $20.57 | $2.29 | 9.0x | -78% |
| FY2011 Q4 | Sep 30 2011 | $17.67 | $2.35 | 7.5x | -82% |
| FY2011 Q3 | - | $27.34 | $2.16 | 12.7x | -70% |
| FY2011 Q2 | - | $27.73 | $2.10 | 13.2x | -68% |
| FY2011 Q1 | Dec 31 2010 | $27.97 | $2.12 | 13.2x | -68% |
| FY2010 Q4 | - | $24.26 | $2.04 | 11.9x | -72% |
| FY2010 Q3 | Jun 30 2010 | $23.06 | $1.94 | 11.9x | -72% |
| FY2010 Q2 | Mar 31 2010 | $28.37 | $1.84 | 15.4x | -63% |
| FY2010 Q1 | - | $27.50 | $1.73 | 15.9x | -62% |
| FY2009 Q4 | Sep 30 2009 | $27.14 | $1.71 | 15.9x | -62% |
| FY2009 Q3 | - | $32.00 | $1.65 | 19.4x | -54% |
| FY2009 Q2 | - | $26.08 | $1.56 | 16.7x | -60% |
| FY2009 Q1 | Dec 31 2008 | $30.73 | $1.51 | 20.4x | -51% |
| FY2008 Q4 | - | $24.44 | $1.42 | 17.2x | -59% |
| FY2008 Q3 | Jun 30 2008 | $32.53 | $1.30 | 25.0x | -40% |
| FY2008 Q2 | Mar 31 2008 | $26.01 | $1.19 | 21.9x | -48% |
| FY2008 Q1 | Dec 31 2007 | $28.57 | $1.11 | 25.7x | -38% |
| FY2007 Q4 | Sep 30 2007 | $34.93 | $1.14 | 30.6x | -27% |
Average P/E for displayed period: 41.8x
ACM Chart Terminal
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Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
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Peer Comparison
Compare growth, multiples, and margins vs sector.
ACM — Frequently Asked Questions
Quick answers to the most common questions about buying ACM stock.
What is ACM's P/E ratio?
Aecom (ACM) trailing twelve-month P/E ratio is 18.0x, based on TTM diluted EPS of $3.91. The 5-year average P/E is 42.3x and the historical range spans 17.5x to 115.5x.
Is ACM stock overvalued or undervalued?
ACM trades at 18.0x P/E, below its 5-year average of 42.3x. At the 5th percentile of its historical range (17.5x–115.5x), the stock is priced at a discount to its own history.
Is ACM stock expensive?
No, ACM is not expensive on a historical basis. The current P/E of 18.0x is below the 5-year average of 42.3x and sits at the 5th percentile of its valuation range.
What is ACM's historical P/E range?
Over the past 5 years, ACM's P/E ratio has ranged from 17.5x to 115.5x, with a median of 31.2x and an average of 42.3x. The current P/E of 18.0x places the stock at the 5th percentile of this range. Full historical data spans 2007–2026.
How does ACM's P/E compare to the S&P 500?
ACM trades at 18.0x P/E versus the S&P 500 median of 26.6x. The 32% discount to the market suggests lower growth expectations or perceived higher risk.
How does ACM's valuation compare to Industrials peers?
Aecom P/E of 18.0x compares to the Industrials sector median of 27.5x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is ACM's PEG ratio?
ACM PEG ratio is N/A, based on a P/E of 18.0x and EPS growth of 42.7%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is ACM's earnings yield?
ACM earnings yield is 5.55%, the inverse of its 18.0x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.