Cash conversion remains volatile, as demonstrated by the OCF/NI ratio swinging to 1.97 in 2026Q1 following a period where working capital outflows reached $45.1 million in 2025Q4.
| Metric | TTM | Dec'25 | Dec'24 | Dec'23 | Dec'22 | Dec'21 | Dec'20 | Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 | Dec'08 | Dec'07 | Dec'06 | Dec'05 | Dec'04 | Dec'03 | Dec'02 | Dec'01 | Dec'00 | Dec'99 |
|---|
| Cash from Operations | 96.65M | 118.31M | 140.82M | 156.87M | 215.61M | 150.19M | 69.7M | -13.59M | 46.97M | 56.28M | -8.8M | 18.26M | -16.05M | -15.04M | -10.6M | 3.53M | -5.89M | -33.94M | -48.72M | -31.1M | 19.02M | -12.17M | 71.63M | -55.81M | -55.98M | -16.58M | 99.68M | -39.1M |
| Operating CF Margin % | - | 14.1% | 13.83% | 13.87% | 23.44% | 22.67% | 14.69% | -3.96% | 10.61% | 13.71% | -3.3% | 6.06% | -7.9% | -7.69% | -5.21% | 1.11% | -2.14% | -25.52% | -19.47% | -7.68% | 4.12% | -3.27% | 14.1% | -17.33% | -18.08% | -4.54% | 14.65% | -9.84% |
| Operating CF Growth % | -207.52% | -15.99% | -10.23% | -27.24% | 43.56% | 115.47% | 612.75% | -128.94% | -16.56% | 739.66% | -148.19% | 213.78% | -6.69% | -41.95% | -399.94% | 159.96% | 82.64% | 30.33% | -56.63% | -263.55% | 256.27% | -116.99% | 228.35% | 0.31% | -237.72% | -116.63% | 354.91% | - |
| Net Income | 100.87M | 120.24M | 200.99M | 246.26M | 183.08M | 98.65M | 49.98M | 17.03M | 45.88M | 126.96M | 11M | 14.68M | -11.27M | -17.14M | -34.03M | 5.08M | -17.57M | -77.47M | -196.66M | -11.4M | 40.77M | -3.85M | 74.17M | -113.88M | -26.15M | -20.16M | 99.11M | 14.43M |
| Depreciation & Amortization | 17.71M | 17.61M | 15.81M | 13.07M | 11.61M | 10.82M | 9.94M | 7.88M | 5.77M | 5M | 4.26M | 4.87M | 4.59M | 5.08M | 6.88M | 8.5M | 7.04M | 7.44M | 23.57M | 21.91M | 20.14M | 23.73M | 22.98M | 13.56M | 11.76M | 21.21M | 17.81M | 19.08M |
| Stock-Based Compensation | 15.43M | 0 | 20.95M | 18.27M | 13.44M | 12.07M | 10.48M | 8.17M | 7.78M | 5.67M | 5.18M | 5.58M | 4.81M | 4.34M | 3.98M | 4.69M | 4.09M | 4.65M | 4.71M | 5.53M | 5.47M | 1.14M | 189K | 189K | 340K | 0 | 0 | 0 |
| Deferred Taxes | -1.36M | 0 | -15.59M | -20.02M | 8.54M | 20.26M | 4.68M | 3.3M | 11.21M | -82.08M | 519K | 779K | 1.27M | -1.47M | 834K | 613K | -1.41M | -765K | 189K | -91K | -209K | -828K | -4.97M | 73.69M | -39.65M | -16.02M | -8.36M | -2.76M |
| Other Non-Cash Items | 2.75M | 11.31M | 4.06M | -3.48M | 10.55M | 3.75M | 3.53M | 3.61M | 2.21M | -8.13M | 909K | 1.72M | 1.82M | 1.4M | 6.77M | 1.01M | 2.02M | 12.11M | 122.67M | 9.7M | -17.38M | -13.53M | -54.34M | -10.39M | -3.22M | -12.21M | -19.57M | 3.66M |
| Working Capital Changes | -38.76M | -30.86M | -85.4M | -97.23M | -11.61M | 4.64M | -8.92M | -53.6M | -25.89M | 8.87M | -30.66M | -9.36M | -17.26M | -7.24M | 4.98M | -16.36M | -58K | 20.09M | -3.19M | -56.76M | -29.78M | -18.83M | 33.6M | -18.98M | 932K | 10.59M | 10.68M | -62.82M |
| Change in Receivables | 4.84M | 37.43M | 6.91M | -50.76M | -67.27M | -18.15M | -1.39M | -6M | -3.88M | -23.57M | -14.13M | 5.17M | -7.07M | -11.53M | 10.48M | 22.69M | -38.65M | 8.57M | 48.64M | -1.54M | 6.7M | 3.13M | -16.71M | -20.18M | 4.73M | 86.45M | 0 | 0 |
| Change in Inventory | -32.96M | -42.22M | 5.92M | -69.96M | -58.43M | -39.02M | -17.65M | -17.95M | -10.51M | 5.7M | -6.57M | -15.94M | -12.28M | 2.21M | 5.9M | -11.87M | 3.55M | 26.45M | -6.94M | -5.7M | -47.34M | 4.12M | 9.9M | -4.41M | -7.33M | 15.82M | -39.43M | -16.99M |
| Change in Payables | 30.9M | 6.19M | -413K | -8.1M | 31.39M | 22.05M | 18.06M | -19.15M | -703K | 25M | 799K | 6M | 772K | 7.31M | -13.49M | -17.94M | 32.28M | -11.04M | -23.33M | -24.99M | 21.4M | -7.28M | 754K | -42K | -12.66M | -27.46M | 0 | 0 |
| Cash from Investing | -21.18M | 29.93M | -108.73M | -100.86M | -257.25M | -8.72M | -7.27M | -11.97M | -4.71M | -7.29M | -2.24M | -1.83M | -1.02M | 485K | 8.12M | -2.12M | 5.65M | 123.28M | 6.22M | 47.95M | 23.59M | -29.35M | -3.05M | -1.03M | -47M | -28.9M | -11.02M | -19.12M |
| Capital Expenditures | -8.17M | -11.29M | -12.18M | -20.66M | -10.68M | -8.72M | -7.43M | -11.97M | -4.71M | -7.29M | -2.51M | -1.83M | -1.02M | -822K | -591K | -2.12M | -1.4M | -463K | -3.41M | -10.39M | -6.92M | -7.79M | -5.54M | -4.99M | -11.75M | -29.58M | -21.85M | -16.91M |
| CapEx % of Revenue | 0.97% | 1.35% | 1.2% | 1.83% | 1.16% | 1.32% | 1.57% | 3.49% | 1.07% | 1.77% | 0.94% | 0.61% | 0.5% | 0.42% | 0.29% | 0.66% | 0.51% | 0.35% | 1.36% | 2.57% | 1.5% | 2.09% | 1.09% | 1.55% | 3.79% | 8.1% | 3.21% | 4.26% |
| Acquisitions | 0 | 0 | 0 | 0 | 0 | 0 | 168K | 0 | 0 | 0 | 270K | 0 | 0 | 0 | 0 | 0 | 0 | 122.26M | 0 | 0 | 0 | -1.5M | -14.57M | -14.57M | 0 | 0 | 0 | -2.21M |
| Investments | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Other Investing | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -4.71M | 0 | 270K | -1.83M | 0 | 1.31M | 8.71M | 3K | 7.06M | 1.49M | 9.62M | -4.86M | -924K | -4.89M | 77K | 575K | -260K | 677K | 10.83M | 0 |
| Cash from Financing | -105.78M | -124.49M | -71.19M | -68.27M | -65.48M | -52.45M | -2.39M | -13.41M | 1.19M | 15.07M | 2.43M | 31.42M | 2.76M | 15.72M | 1.3M | 591K | 599K | -83.11M | 896K | -71.31M | 27.73M | 3.6M | 4.87M | 3.64M | 127.35M | 1.95M | 75.96M | 58.42M |
| Debt Issued (Net) | -327K | 0 | -1.52M | -1.24M | -987K | -763K | -399K | 0 | 0 | 0 | 0 | -14.92M | -470K | 15M | 0 | 0 | 0 | -83.34M | 0 | -74.22M | 24.22M | 0 | 0 | 0 | 121.58M | 0 | 0 | 0 |
| Equity Issued (Net) | -102.9M | -121.08M | -60.49M | -52.5M | -57.49M | -49.99M | -7.5M | -17.74M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 569K | 184K | 786K | 2.9M | 3.52M | 3.6M | 4.87M | 3.64M | 5.77M | 1.95M | 348.58M | 0 |
| Dividends Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -2.02M | -12.42M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Share Repurchases | -102.9M | -121.08M | -60.49M | -52.5M | -57.49M | -49.99M | -7.5M | -17.74M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -1.22M | 0 | 0 |
| Other Financing | -2.55M | -3.41M | -9.18M | -14.53M | -7M | -1.7M | 5.51M | 4.34M | 1.19M | 15.07M | 2.43M | 46.34M | 3.23M | 720K | 1.3M | 591K | 30K | 45K | 2.13M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -272.62M | 58.42M |
| Net Change in Cash | -30.05M | 21.94M | -42.89M | -12.4M | -109.33M | 91.45M | 57.7M | -38.37M | 44.02M | 63.23M | -8.1M | 48.14M | -15.54M | 1.3M | -1.89M | 1.13M | 723K | 7.33M | -46.18M | -56.57M | 69.03M | -36.88M | 75.25M | -53.05M | 26.47M | -43.98M | 164.63M | 192K |
| Free Cash Flow | 88.47M | 107.01M | 128.64M | 136.21M | 204.92M | 141.47M | 62.27M | -25.56M | 42.25M | 49M | -11.3M | 16.43M | -17.07M | -15.86M | -11.19M | 1.41M | -7.29M | -34.41M | -52.13M | -41.49M | 12.09M | -19.96M | 66.09M | -60.8M | -67.73M | -46.15M | 77.83M | -56.02M |
| FCF Margin % | 10.46% | 12.75% | 12.64% | 12.05% | 22.27% | 21.36% | 13.12% | -7.45% | 9.55% | 11.93% | -4.23% | 5.45% | -8.4% | -8.11% | -5.5% | 0.44% | -2.65% | -25.86% | -20.83% | -10.25% | 2.62% | -5.36% | 13.01% | -18.88% | -21.87% | -12.64% | 11.44% | -14.1% |
| FCF Growth % | -27.99% | -16.81% | -5.56% | -33.53% | 44.85% | 127.19% | 343.59% | -160.5% | -13.77% | 533.43% | -168.81% | 196.27% | -7.57% | -41.79% | -894.04% | 119.31% | 78.8% | 34% | -25.64% | -443.06% | 160.58% | -130.21% | 208.7% | 10.24% | -46.76% | -159.3% | 238.94% | - |
| FCF per Share | 2.86 | 3.38 | 3.93 | 4.11 | 6.11 | 4.13 | 1.82 | -0.76 | 1.24 | 1.47 | -0.37 | 0.54 | -0.61 | -0.58 | -0.42 | 0.05 | -0.28 | -1.33 | -2.03 | -1.63 | 0.48 | -0.80 | 2.61 | -2.47 | -2.77 | -1.90 | 3.54 | -2.37 |
| FCF Conversion (FCF/Net Income) | 0.88x | 0.98x | 0.70x | 0.64x | 1.18x | 1.52x | 1.39x | -0.80x | 1.02x | 0.44x | -0.80x | 1.24x | 1.42x | 0.88x | 0.31x | 0.70x | 0.34x | 0.44x | 0.25x | 2.73x | 0.47x | 3.16x | 0.97x | 0.49x | 2.14x | 0.82x | 1.01x | -2.71x |
| Interest Paid | 0 | 0 | 4.73M | 4.87M | 4.99M | 5.09M | 5.16M | 5.21M | 5.47M | 5.32M | 4.82M | 3.98M | 832K | 409K | 0 | 0 | 0 | 3.01M | 3.19M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Taxes Paid | 0 | 0 | 61.13M | 54.22M | 10.76M | 1.5M | 876K | 1.03M | 858K | 583K | 525K | 669K | 931K | -737K | 848K | 515K | 2.29M | 734K | 1.06M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Cyclical revenue and working capital
According to quarterly cash flow statements, the relationship between net income and operating cash flow has become increasingly volatile, with the OCF/NI ratio swinging from 1.97 in 2026Q1 to a negative 0.19 in 2025Q4, highlighting significant friction in converting accounting profits into actual cash.
The wide variance in conversion ratios suggests that reported net income is frequently decoupled from cash generation due to the timing of customer acceptances and inventory movements. Investors should monitor whether this volatility is a temporary byproduct of the current cyclical downturn or a structural issue in the company's revenue recognition process.
As reported in financial filings, the company's free cash flow trajectory has deteriorated significantly, with margins falling from a peak of 20.3% in 2025Q3 to a negative 3.7% by 2025Q4, reflecting the impact of reduced operational efficiency during the recent period of top-line contraction.
The inability to maintain positive free cash flow during periods of lower revenue indicates that the company's high fixed-cost base is exerting downward pressure on cash generation. This trend warrants further investigation into whether the current cost structure can be adjusted to protect cash reserves if the industry downturn persists.
Based on the provided cash flow data, working capital changes have acted as a major drag on cash flow, most notably in 2025Q4 when a $45.1M outflow significantly offset net income, illustrating the sensitivity of the company's cash position to inventory and receivable management cycles.
The lumpy nature of these working capital swings suggests that the company is susceptible to large, periodic cash outflows associated with the fulfillment of complex equipment orders. This pattern implies that cash flow visibility remains low, as the timing of customer payments and inventory build-ups remains inherently unpredictable.
Data from recent SEC filings indicates that Axcelis has prioritized share repurchases, with $45.3M deployed in 2025Q2 alone, even as the company navigates a period of significant revenue contraction and fluctuating cash flow, suggesting a management focus on supporting EPS through reduced share counts.
While the company maintains a strong balance sheet, the decision to continue buybacks during a cyclical trough may limit the capital available for R&D or strategic pivots. Investors should monitor whether this capital allocation strategy remains sustainable if the current revenue contraction continues to pressure operating cash flow.
Quick answers to the most common questions about buying ACLS stock.
Axcelis Technologies, Inc. (ACLS) generated $118.3M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
Axcelis Technologies, Inc. (ACLS) generated $107.0M 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.
Axcelis Technologies, Inc. (ACLS) spent $11.3M 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, Axcelis Technologies, Inc. (ACLS) spent $121.1M on share repurchases. This shows the company's commitment to returning capital to its equity investors.