Aecom (ACM) P/E Ratio History
Historical price-to-earnings valuation from 2007 to 2026
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ACM Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 6, 2026, Aecom (ACM) trades at a price-to-earnings ratio of 19.9x, with a stock price of $83.92 and trailing twelve-month earnings per share of $3.56.
The current P/E is 55% below its 5-year average of 44.2x. 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 25.9x, ACM trades at a 23% discount to its sector peers. The sector includes 415 companies with P/E ratios ranging from 0.0x to 185.4x.
Relative to the broader market, ACM trades at a notable discount to the S&P 500 median P/E of 25.2x. 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 P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $15B | 53.2 | - | -62% | |
| $118B | 115.5 | 6.70 | +13% | |
| $34B | 85.5 | 28.78 | +146% | |
| $27B | 94.5 | 2.13 | +13% | |
| $4B | 10.9Lowest | - | +15% | |
| $8B | 33.3 | 4.12 | -24% | |
| $5B | 20.2 | 1.10 | +52% | |
| $13B | 57.8 | 1.68 | +7% | |
| $7B | 60.4 | 3.62 | +311%Best | |
| $77B | 20.9 | 0.67Best | +10% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
ACM Historical P/E Data (2007–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q1 | Fri Jan 02 2026 00:00:00 GM | $96.40 | $3.85 | 25.0x | -41% |
| FY2025 Q4 | $130.47 | $4.54 | 28.7x | -32% | |
| FY2025 Q3 | Mon Jun 30 2025 00:00:00 GM | $112.86 | $4.92 | 22.9x | -46% |
| FY2025 Q2 | Mon Mar 31 2025 00:00:00 GM | $92.73 | $4.59 | 20.2x | -52% |
| FY2025 Q1 | $106.82 | $3.52 | 30.3x | -28% | |
| FY2024 Q4 | Mon Sep 30 2024 00:00:00 GM | $103.27 | $2.96 | 34.9x | -17% |
| FY2024 Q3 | Sun Jun 30 2024 00:00:00 GM | $88.14 | $1.86 | 47.4x | +12% |
| FY2024 Q1 | Sun Dec 31 2023 00:00:00 GM | $92.43 | $0.80 | 115.5x | +174% |
| FY2023 Q4 | Sat Sep 30 2023 00:00:00 GM | $83.04 | $0.74 | 112.2x | +166% |
| FY2023 Q3 | Fri Jun 30 2023 00:00:00 GM | $84.69 | $1.31 | 64.6x | +53% |
| FY2023 Q2 | Fri Mar 31 2023 00:00:00 GM | $84.32 | $3.00 | 28.1x | -33% |
| FY2023 Q1 | Sat Dec 31 2022 00:00:00 GM | $84.93 | $2.39 | 35.5x | -16% |
Average P/E for displayed period: 42.1x
Full ACM Stock Analysis
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Start ComparisonACM — Frequently Asked Questions
Quick answers to the most common questions about buying ACM stock.
Is ACM stock overvalued or undervalued?
ACM trades at 19.9x P/E, below its 5-year average of 44.2x. At the 5th percentile of historical range, the stock is priced at a discount to its own history.
How does ACM's valuation compare to peers?
Aecom P/E of 19.9x compares to sector median of 25.9x. The discount suggests lower growth expectations or higher risk.
What is ACM's PEG ratio?
ACM PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 2007-2026.