Cash generation remains highly erratic, evidenced by a 2026Q2 operating cash flow of only $3.8 million against $179.9 million in net income, further pressured by a $144.5 million outflow from working capital changes.
| Metric | TTM | Sep'25 | Sep'24 | Sep'23 | Sep'22 | Sep'21 | Sep'20 | Sep'19 | Sep'18 | Sep'17 | Sep'16 | Sep'15 | Sep'14 | Sep'13 | Sep'12 | Sep'11 | Sep'10 | Sep'09 | Sep'08 | Sep'07 | Sep'06 | Sep'05 | Sep'02 |
|---|
| Cash from Operations | 553.86M | 821.6M | 827.49M | 695.98M | 713.64M | 704.67M | 329.62M | 777.62M | 774.55M | 696.65M | 814.15M | 764.43M | 360.63M | 408.6M | 433.35M | 132.01M | 158.63M | 218.33M | 155.23M | 137.46M | 121.27M | 46.59M | 0 |
| Operating CF Margin % | - | 5.09% | 5.14% | 4.84% | 5.43% | 5.28% | 2.49% | 5.7% | 5.58% | 3.83% | 4.68% | 4.25% | 4.32% | 5.01% | 5.27% | 1.64% | 2.42% | 3.57% | 2.99% | 3.24% | 3.54% | 1.94% | - |
| Operating CF Growth % | -188.5% | -0.71% | 18.9% | -2.47% | 1.27% | 113.78% | -57.61% | 0.4% | 11.18% | -14.43% | 6.5% | 111.97% | -11.74% | -5.71% | 228.27% | -16.78% | -27.34% | 40.65% | 12.92% | 13.36% | 160.3% | - | - |
| Net Income | 505.72M | 636.19M | 460.25M | 100.14M | 334.7M | 202.98M | -153.74M | -183.99M | 197.13M | 421.48M | 163.47M | -71.23M | 232.76M | 243.2M | -56.93M | 284.09M | 249.34M | 189.7M | 147.23M | 100.3M | 53.69M | 53.81M | 23M |
| Depreciation & Amortization | 203.61M | 175.92M | 178.81M | 175.72M | 170.89M | 176.4M | 237.38M | 261.19M | 267.57M | 278.63M | 398.73M | 599.26M | 95.39M | 94.41M | 102.97B | 110.31M | 78.9M | 84.12M | 62.75M | 45.13M | 39.83M | 19.93M | 0 |
| Stock-Based Compensation | 61.48M | 61.44M | 61.52M | 45.88M | 38.47M | 44.74M | 54.23M | 63.81M | 73.09M | 83.77M | 73.41M | 85.85M | 34.44M | 32.61M | 26.55M | 24.94M | 34.61M | 25.97M | 24.15M | 24.97M | 0 | 0 | 0 |
| Deferred Taxes | 0 | 35.41M | 150.89M | -135.88M | 22.82M | -48.27M | 11.13M | -98.02M | 36.75M | -49.86M | -110.12M | -53.03M | 27.16M | -7.21M | -20.3M | 29.2M | 21.84M | -3.21M | -34.47M | 15.67M | -12.14M | 13.09M | 0 |
| Other Non-Cash Items | 421.06M | 54.93M | 126.56M | 460.25M | 12.73M | 255.81M | 258.55M | 597.54M | 201.52M | -14.18M | 64.64M | 74.48M | -54.17M | -9.15M | 316.95M | -163.33M | -25.12M | -32.65M | -37.87M | 16M | 7.08M | -1.15M | 0 |
| Working Capital Changes | -313.81M | -142.29M | -150.55M | 49.86M | 134.02M | 73M | -77.92M | 137.08M | -1.5M | -23.19M | 224.03M | 129.1M | 25.04M | 54.75M | 64.12M | -242.88M | -200.94M | -45.59M | -3.96M | -39.63M | 32.81M | -39.1M | 0 |
| Change in Receivables | -223.34M | 334.42M | -500.8M | -402.5M | 236.6M | 533.01M | -136.96M | -316.49M | -381.79M | -432.77M | 337.29M | 369.6M | -14.4M | 92.15M | -21.54M | -89.05B | -234.25M | -67.85M | -150.93M | -114.55M | 0 | 0 | 0 |
| Change in Inventory | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Change in Payables | -78.22M | -333.56M | 391.18M | 169.51M | -102.87M | -250.14M | -192.98M | 251.41M | 474.95M | 292.5M | 16.62M | 142.13M | 91.95M | -47.02M | 81M | 76.14M | 57.04M | -8.06M | 36.11M | -51.15M | 0 | 0 | 0 |
| Cash from Investing | -400.42M | -413.22M | -210.64M | -138.18M | -175.03M | -421.09M | 2.04B | -146.76M | -59.09M | -202.71M | -162.62M | -3.35B | -142.8M | -139.49M | -73.77M | -421.92M | -614.53M | -14.29M | -521.3M | -191.92M | -71.81M | -137M | -20M |
| Capital Expenditures | -115.29M | -136.68M | -119.6M | -105.6M | -137.02M | -136.26M | -114.59M | -100.66M | -113.28M | -86.35M | -191.39M | -69.43M | -62.85M | -52.12M | -62.87M | -77.99M | -68.49M | -62.92M | -69.39M | -43.2M | -32.3M | -31.18M | -20M |
| CapEx % of Revenue | 0.72% | 0.85% | 0.74% | 0.73% | 1.04% | 1.02% | 0.87% | 0.74% | 0.82% | 0.47% | 1.1% | 0.39% | 0.75% | 0.64% | 0.77% | 0.97% | 1.05% | 1.03% | 1.34% | 1.02% | 0.94% | 1.3% | 1.14% |
| Acquisitions | -234.62M | -282.5M | -73.72M | -38.9M | -14.95M | -49.28M | -83.03M | -72.53M | 44.11M | -125.15M | -37.38M | -3.31B | -82.67M | -63.1M | -12.77M | -386.5M | -529.56M | -32.81M | -566.9M | -158.74M | -53.3M | -158.89M | 0 |
| Investments | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Other Investing | -50.51M | 5.96M | -20.51M | 344K | -33.31M | -251.05M | 2.22B | 17.29M | 26.4M | 7.89M | 54.62M | 44.91M | 4.4M | 0 | 2.93M | 0 | 0 | 0 | 301K | 225K | 14.81M | 785K | 20M |
| Cash from Financing | -706.75M | -403.67M | -295.46M | -472.94M | -588.32M | -872.53M | -1.63B | -433.28M | -624.87M | -386.49M | -637.98M | 2.72B | -233.76M | -254.37M | -237.61M | 137.46M | 770.58M | -110.73M | 346.71M | 338.16M | 23.8M | 84.08M | 0 |
| Debt Issued (Net) | 136.74M | 135.79M | 290.79M | -45.97M | -38.72M | -2.18M | -1.38B | -283.85M | -345.75M | -297.56M | -493.74M | 2.97B | -167.16M | 95.47M | -96.14M | 223.26M | 750.12M | -232.63M | 312.08M | -66.84M | -99.85M | 120.89M | 0 |
| Equity Issued (Net) | -666.39M | -348.3M | -443.94M | -346.39M | -446.3M | -837.37M | -160.56M | -67.76M | -144.23M | 5.01M | 2.3M | 2.45M | -21.04M | -374.07M | -145.99M | -152.02M | -13.67M | 87.53M | -4.77M | 476.61M | 127.89M | -28.94M | 0 |
| Dividends Paid | -144.66M | -133.57M | -115.24M | -96.19M | -63.29M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -168K | -249K | -1.9M | -5.25M | 0 |
| Share Repurchases | -708.32M | -388.38M | -478.5M | -379.28M | -472.97M | -867.09M | -186.95M | -98.21M | -179.47M | -25.08M | -25.89M | -23.11M | -34.92M | -388.1M | -159.75M | -167.04M | -17.17M | -13.49M | -13.94M | -50.08M | -175.05M | -70.91M | 0 |
| Other Financing | -32.44M | -57.59M | -27.06M | 15.62M | -40M | -28.95M | -85.66M | -81.67M | -134.88M | -93.94M | -146.54M | -250.49M | -45.55M | 24.23M | 4.51M | 66.23M | 34.13M | 24.07M | 39.56M | -71.35M | -2.34M | -2.63M | 0 |
| Net Change in Cash | -554.56M | 877K | 320.67M | 88M | -56.99M | -479.14M | 822.69M | -1.09M | 84.37M | 110.22M | 8.25M | 109.7M | -26.49M | 6.9M | 486.7M | 64.74M | -248.44M | 96.25M | -219.99M | 286.64M | 127.87M | 0 | -20M |
| Free Cash Flow | 410.25M | 684.93M | 707.89M | 590.38M | 576.62M | 568.41M | 215.03M | 676.95M | 661.27M | 610.3M | 622.77M | 695.01M | 297.77M | 356.48M | 370.48M | 54.02M | 90.14M | 155.41M | 85.84M | 94.26M | 88.97M | 15.41M | -20M |
| FCF Margin % | 2.57% | 4.24% | 4.4% | 4.11% | 4.39% | 4.26% | 1.62% | 4.96% | 4.76% | 3.35% | 3.58% | 3.86% | 3.56% | 4.37% | 4.51% | 0.67% | 1.38% | 2.54% | 1.65% | 2.22% | 2.6% | 0.64% | -1.14% |
| FCF Growth % | -50.95% | -3.24% | 19.9% | 2.39% | 1.44% | 164.34% | -68.24% | 2.37% | 8.35% | -2% | -10.39% | 133.4% | -16.47% | -3.78% | 585.8% | -40.07% | -41.99% | 81.04% | -8.93% | 5.95% | 477.25% | 177.06% | - |
| FCF per Share | 3.17 | 5.14 | 5.19 | 4.21 | 4.04 | 3.80 | 1.33 | 4.31 | 4.08 | 3.84 | 3.99 | 4.65 | 3.02 | 3.50 | 3.31 | 0.46 | 0.78 | 1.42 | 0.82 | 1.08 | 1.22 | 0.34 | -0.25 |
| FCF Conversion (FCF/Net Income) | 0.81x | 1.46x | 2.06x | 12.58x | 2.30x | 4.07x | -1.77x | -2.98x | 5.68x | 2.05x | 8.47x | -4.94x | 1.57x | 1.71x | -7.40x | 0.48x | 0.67x | 1.15x | 1.05x | 1.37x | 2.26x | 0.87x | - |
| Interest Paid | 0 | 166.87M | 177.45M | 153.97M | 104.64M | 255.68M | 201.4M | 0 | 271.84M | 226.09M | 216.13M | 0 | 43.36M | 37.34M | 39.04M | 36.62M | 8.64M | 15.85M | 9.47M | 0 | 0 | 0 | 0 |
| Taxes Paid | 0 | 91.97M | 139.97M | 78.45M | 104.74M | 114.46M | 71.03M | 0 | 40.59M | 11.54M | 13.11M | 0 | 68.8M | 115.51M | 38.48M | 37.99M | 63.62M | 68.41M | 60.72M | 0 | 0 | 0 | 0 |
Working capital volatility
Based on reported quarterly filings, ACM's cash conversion quality appears highly inconsistent, as evidenced by the 2026Q2 period where operating cash flow of $3.8 million represented a negligible fraction of the $179.9 million in net income, signaling potential issues with accrual-based revenue recognition timing.
The extreme variance between net income and operating cash flow suggests that reported earnings are frequently decoupled from actual cash generation. Investors should monitor whether this divergence is a recurring byproduct of percentage-of-completion accounting or if it indicates an underlying difficulty in collecting receivables from large-scale infrastructure clients.
As reported in financial statements, ACM's free cash flow trajectory has been erratic, swinging from a peak margin of 6.7% in 2024Q4 to a negative 0.7% in 2026Q2, which highlights the sensitivity of the firm's cash generation to project-specific milestones and working capital fluctuations.
The inability to maintain a consistent free cash flow margin suggests that the business model remains vulnerable to the timing of project payments. This volatility may complicate valuation efforts, as the firm's cash-generating capacity appears less predictable than its top-line revenue figures might otherwise imply.
According to recent SEC filings, ACM has faced persistent working capital headwinds, with negative cash flow impacts from working capital changes in eight of the last ten quarters, including a significant $144.5 million outflow during the most recent 2026Q2 reporting period.
These recurring outflows suggest that the company is consistently tying up cash in its project pipeline, likely due to extended billing cycles or inventory build-ups. Such dynamics may indicate that the firm is effectively financing its clients' projects, which warrants further investigation into the credit quality of its backlog.
Based on the provided data, ACM has prioritized shareholder returns, deploying over $300 million in buybacks during 2026Q1, even as operating cash flow has shown signs of deterioration, suggesting a management preference for capital return over organic reinvestment or debt reduction during periods of low growth.
The aggressive pace of share repurchases, particularly when cash flow is volatile, may indicate management's confidence in long-term stability despite recent operational headwinds. However, investors should monitor whether this capital allocation strategy limits the firm's flexibility to pursue strategic acquisitions or respond to potential project-related liabilities.
Quick answers to the most common questions about buying ACM stock.
Aecom (ACM) generated $821.6M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
Aecom (ACM) generated $684.9M in free cash flow in 2025. Free cash flow is the cash left over after capital expenditures, which can be used to pay dividends, repurchase shares, or pay down debt.
Aecom (ACM) spent $136.7M on capital expenditures in 2025. CapEx represents the cash invested in physical assets like property, plant, and equipment to maintain or grow the business.
In 2025, Aecom (ACM) returned $133.6M to shareholders via cash dividends and spent $388.4M on share repurchases. This shows the company's commitment to returning capital to its equity investors.