Free cash flow margins have exhibited extreme volatility, ranging from a low of 7.8% in 2026Q1 to a high of 37.6% in 2025Q3, highlighting the impact of timing on system shipments.
| Metric | TTM | Jan'26 | 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 | Dec'98 | Dec'97 | Dec'96 |
|---|
| Cash from Operations | 262.66M | 328.31M | 245.68M | 171.97M | 136.7M | 175.28M | 105.98M | 18.15M | 35.09M | 64.37M | 46.63M | 33.79M | 4.29M | 6.08M | 22.07M | 45.44M | 16.32M | -12.06M | 15.39M | 23.58M | 20.64M | 8.08M | -3.2M | 6.65M | 1.34M | 22.96M | -4.63M | -700K | -6.9M | 4.2M | 400K |
| Operating CF Margin % | - | 32.66% | 24.88% | 21.08% | 13.6% | 22.22% | 19.04% | 5.93% | 12.82% | 25.23% | 20.03% | 15.24% | 2.37% | 3.45% | 10.1% | 24.28% | 8.36% | -15.33% | 11.74% | 14.73% | 10.26% | 9.74% | -3.8% | 11.37% | 2.34% | 28.92% | -5.25% | -1.84% | -34.33% | 11.44% | 1.32% |
| Operating CF Growth % | 11.01% | 33.64% | 42.86% | 25.8% | -22.01% | 65.38% | 484.06% | -48.29% | -45.48% | 38.04% | 38% | 687.72% | -29.49% | -72.43% | -51.44% | 178.42% | 235.35% | -178.36% | -34.74% | 14.23% | 155.6% | 352.49% | -148.11% | 395.09% | -94.15% | 596.28% | -560.86% | 89.86% | -264.29% | 950% | -82.61% |
| Net Income | 106.41M | 136.76M | 201.67M | 121.16M | 223.33M | 142.35M | 31.02M | 1.91M | 45.1M | 32.91M | 36.95M | 17.96M | -4.64M | 3.46M | 43.87M | 25.23M | 27.02M | -29.63M | -249.69M | 11.86M | 12.71M | 4.98M | 6.75M | 1.77M | -1.43M | 11.74M | 25.03M | 3.3M | -14.1M | 5.8M | 4M |
| Depreciation & Amortization | 65.75M | 60.44M | 62.31M | 67.21M | 64.66M | 65.8M | 67.58M | 16.41M | 6.38M | 5.93M | 6M | 6.1M | 7.11M | 6.94M | 5.89M | 6.32M | 5.78M | 8.65M | 11.74M | 10.2M | 8.67M | 2.65M | 2.21M | 2.17M | 1.65M | 1.37M | 1M | 2M | 5M | 200K | 300K |
| Stock-Based Compensation | 27.81M | 27.62M | 28.58M | 25.51M | 24.43M | 19.54M | 17.66M | 10.59M | 6.06M | 5.67M | 4.78M | 7.6M | 6.24M | 4.11M | 4M | 4.8M | 5.44M | 3.76M | 3.88M | 3.77M | 5.03M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Deferred Taxes | 16.65M | 12.87M | -26.48M | -22.43M | -33.6M | -12.62M | -11.63M | -4.12M | 2.16M | 17.21M | 5.01M | 3.98M | -3.94M | -1.51M | -20.81M | -9.02M | -152K | -217K | -2.45M | -3.31M | 5.72M | -109K | 1.49M | -1.1M | 252K | 1.81M | 0 | 0 | 0 | -600K | 300K |
| Other Non-Cash Items | 4.49M | 38.61M | 24.08M | 13.01M | 14.4M | 10.84M | 30.09M | 28.67M | 4.6M | 4.2M | 4.94M | 7.25M | 7.63M | 6.78M | 6.48M | 1.56M | -933K | 5.6M | 238.73M | 893K | 10.53M | 2.9M | 457K | 1.93M | 4.31M | 2.42M | -6.78M | 0 | -200K | -7.3M | -8.5M |
| Working Capital Changes | 41.19M | 52.02M | -44.48M | -32.49M | -156.52M | -50.63M | -28.74M | -35.31M | -29.21M | -1.54M | -11.04M | -9.1M | -8.12M | -13.69M | -17.36M | 16.55M | -20.82M | -217K | 13.17M | 177K | -22M | -2.34M | -14.11M | 1.88M | -3.43M | 5.62M | -23.88M | -6M | 2.4M | 6.1M | 4.3M |
| Change in Receivables | 53.78M | 53.78M | -83.69M | 12.15M | -65.14M | -27.83M | -25.82M | -9.72M | 706K | 430K | -9.28M | -4.34M | 1.15M | 2.63M | -14.74M | 17.96M | -24.11M | -13.2M | 18.3M | -9.52M | 4.22M | 1.72M | -4.63M | 0 | 0 | 0 | 0 | 0 | 0 | 900K | -3.5M |
| Change in Inventory | -3.03M | -3.03M | 19.94M | -16.46M | -93.91M | -57.17M | -42.41M | -9.34M | -31.55M | -4.22M | 4M | -12.53M | -9.39M | -6.76M | -6.7M | -35K | -5.58M | 6.92M | -4.29M | -5.39M | -7.08M | 3.7M | -7.25M | 2.31M | -6.21M | 1.07M | -12.4M | -2M | 900K | -2M | -1.1M |
| Change in Payables | 50.94M | 50.94M | 6.22M | -4.68M | 1.18M | 12.14M | 11.4M | -12.14M | 3.51M | 3.2M | 1.17M | 2.25M | 3.76M | -912K | -2.73M | -3.43M | 2.18M | 3.23M | -12.71M | 3.3M | -6.13M | 1.14M | 794K | 0 | 0 | 0 | 0 | 0 | 0 | -300K | -400K |
| Cash from Investing | -212.37M | -121.57M | -226.55M | -103.39M | -55.69M | -141.79M | -48.6M | 4.1M | 33.77M | -32.52M | 24.47M | -9.08M | -28.53M | -30.02M | -14.93M | -71.21M | -2.77M | 1.69M | -5.71M | -40.49M | 3.6M | 16.02M | -14.14M | -9.11M | -56.48M | -2.43M | -1.37M | -900K | -900K | -3.1M | -2.6M |
| Capital Expenditures | -23.86M | -28.51M | -31.9M | -22.57M | -18.41M | -12.04M | -3.83M | -6.8M | -7.54M | -11.21M | -5.29M | -6.05M | -2.08M | -4.88M | -2.43M | -1.62M | -4.36M | -587K | -3M | -1.72M | -6.89M | -2.68M | -1.77M | -656K | -618K | -2.43M | -1.39M | -1M | -1M | -100K | -300K |
| CapEx % of Revenue | 2.32% | 2.84% | 3.23% | 2.77% | 1.83% | 1.53% | 0.69% | 2.22% | 2.75% | 4.39% | 2.27% | 2.73% | 1.15% | 2.77% | 1.11% | 0.87% | 2.23% | 0.75% | 2.29% | 1.07% | 3.43% | 3.23% | 2.1% | 1.12% | 1.08% | 3.06% | 1.58% | 2.62% | 4.98% | 0.27% | 0.99% |
| Acquisitions | -436.07M | -436.12M | -26.76M | 0 | -4.64M | -23.8M | 0 | 43.88M | 0 | 0 | 0 | 0 | 0 | -3.37M | -18.58M | 0 | -849K | -5.01M | -8.47M | -56.17M | -12.11M | -863K | 0 | 0 | -25.07M | 0 | 0 | 0 | 0 | 0 | 0 |
| Investments | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Other Investing | 0 | 0 | 0 | 2.8M | 0 | 0 | 2.85M | 0 | -5M | -1M | -835K | -2.7M | 0 | 0 | 0 | 0 | 0 | 0 | -30K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16K | 0 | 100K | -3M | -2.3M |
| Cash from Financing | -2.33M | -75.15M | -35.67M | -9.47M | -68.35M | 2.67M | -53.7M | -4.2M | -23.91M | -2.75M | -78.11M | -22.97M | -12.68M | 1.44M | 468K | 51.03M | 531K | 217K | 220K | 1.49M | 10.12M | 1.5M | 1.63M | 1.55M | 2.47M | 44.4M | 672K | 36.3M | 8M | 600K | 400K |
| Debt Issued (Net) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -60M | 0 | 0 | 0 | 0 | 43.24M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -37.7M | 5M | 0 | 0 |
| Equity Issued (Net) | -148.18M | -75.02M | -25.07M | -3.2M | -65.26M | 0 | -52M | -744K | -21.07M | 0 | -8.04M | -20.67M | -12.85M | 1.01M | 0 | 257K | 289K | 217K | 220K | 1.34M | 8.96M | 1.5M | 1.63M | 1.55M | 2.47M | 44.4M | 672K | 74M | 3M | 0 | 0 |
| Dividends Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Share Repurchases | -153.74M | -75.02M | -25.07M | -3.2M | -65.26M | 0 | 0 | -744K | -21.07M | 0 | -8.04M | -20.67M | -12.85M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -7.1M | 0 | 600K | 300K |
| Other Financing | 145.84M | -135K | -10.6M | -6.28M | -3.09M | 2.67M | -1.7M | -3.45M | -2.84M | -2.55M | -10.86M | -2.32M | 161K | 424K | 468K | 7.54M | 242K | 0 | 0 | 148K | 1.17M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 600K | 400K |
| Net Change in Cash | 48.52M | 133.17M | -20.56M | 57.64M | 6.27M | 32.88M | 6.05M | 18.29M | 44.62M | 29.91M | -6.7M | 1.44M | -37.68M | -23.46M | 7.58M | 25.55M | 13.28M | -9.9M | 10.31M | -15.06M | 34.49M | 25.36M | -15.59M | -827K | -52.59M | 64.91M | -5.34M | 34.6M | 200K | 1.9M | -1.9M |
| Free Cash Flow | 238.79M | 299.8M | 213.77M | 149.4M | 118.3M | 163.24M | 102.16M | 11.34M | 27.55M | 53.16M | 41.34M | 27.74M | 2.21M | 1.2M | 19.64M | 43.82M | 11.96M | -12.65M | 12.39M | 21.86M | 13.75M | 5.4M | -4.97M | 5.99M | 725K | 20.53M | -6.01M | -1.7M | -7.9M | 4.1M | 100K |
| FCF Margin % | 23.17% | 29.82% | 21.65% | 18.31% | 11.77% | 20.69% | 18.36% | 3.71% | 10.06% | 20.84% | 17.76% | 12.51% | 1.22% | 0.68% | 8.99% | 23.41% | 6.12% | -16.08% | 9.46% | 13.65% | 6.84% | 6.51% | -5.9% | 10.24% | 1.26% | 25.85% | -6.83% | -4.46% | -39.3% | 11.17% | 0.33% |
| FCF Growth % | -2.81% | 40.24% | 43.09% | 26.29% | -27.53% | 59.8% | 800.52% | -58.83% | -48.17% | 28.59% | 49.04% | 1157.39% | 83.22% | -93.87% | -55.19% | 266.44% | 194.57% | -202.04% | -43.32% | 58.99% | 154.65% | 208.7% | -182.9% | 726.62% | -96.47% | 441.32% | -253.76% | 78.48% | -292.68% | 4000% | -95.45% |
| FCF per Share | 4.78 | 6.08 | 4.30 | 3.03 | 2.38 | 3.28 | 2.06 | 0.38 | 0.86 | 1.65 | 1.30 | 0.86 | 0.07 | 0.04 | 0.60 | 1.68 | 0.47 | -0.41 | 0.40 | 0.75 | 0.50 | 0.32 | -0.29 | 0.36 | 0.04 | 1.24 | -0.38 | -0.16 | -1.75 | 0.47 | 0.01 |
| FCF Conversion (FCF/Net Income) | 2.24x | 2.40x | 1.22x | 1.42x | 0.61x | 1.23x | 3.42x | 9.50x | 0.78x | 1.96x | 1.26x | 1.88x | -0.92x | 1.76x | 0.50x | 1.80x | 0.60x | 0.41x | -0.06x | 1.99x | 1.62x | 1.62x | -0.47x | 3.76x | -0.94x | 1.96x | -0.20x | -0.24x | 0.49x | 0.72x | 0.10x |
| Interest Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.25M | 2.25M | 2.25M | 2.25M | 2.19M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Taxes Paid | 31.87M | 0 | 35.51M | 34.1M | 58.69M | 23.77M | 6.42M | 0 | 4.3M | 14.61M | 10.98M | 2.01M | 1.07M | 5.49M | 2.4M | 2.45M | 916K | 3.06M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Cyclicality and Geopolitical Exposure
As reported in recent financial filings, the OCF/NI ratio has exhibited extreme volatility, ranging from 0.78 in 2026Q1 to a peak of 9.02 in 2025Q4, indicating that net income is a poor proxy for the company's actual cash-generating capacity during specific reporting periods.
The significant divergence between net income and operating cash flow suggests that non-cash charges and working capital fluctuations heavily distort bottom-line performance. Investors should monitor whether this disconnect stems from aggressive revenue recognition timing or the lumpy nature of capital equipment deliveries, which often creates timing mismatches between accounting profit and cash receipt.
Based on the provided cash flow data, free cash flow margins have fluctuated wildly from a low of 7.8% in 2026Q1 to a high of 37.6% in 2025Q3, highlighting the company's sensitivity to the timing of large-scale system shipments and customer acceptance milestones.
The inconsistency in FCF generation suggests that the company's cash trajectory is highly dependent on the cadence of the semiconductor capital expenditure cycle. While the company remains cash-generative, the lack of a stable FCF margin trend warrants caution regarding the predictability of cash flows in the near term.
According to quarterly cash flow statements, working capital changes have been highly erratic, swinging from a $41.2 million inflow in 2025Q3 to a $19.4 million outflow in 2024Q4, which underscores the operational complexity of managing inventory and receivables in a cyclical equipment market.
These swings suggest that the company's cash position is frequently tied up in inventory build-ups or delayed collections, which may be exacerbated by the bespoke nature of its inspection tools. Analysts should investigate whether these working capital movements are indicative of supply chain bottlenecks or shifts in customer payment terms.
As evidenced by the $436.1 million acquisition expenditure in 2025Q4 and periodic share repurchases, management has utilized its cash reserves to pursue inorganic growth, despite the inherent volatility in the company's core operating cash flow generation.
The decision to deploy significant capital toward acquisitions and buybacks suggests management's confidence in long-term market positioning, yet it also reduces the liquidity buffer available for potential downturns. Investors should evaluate whether the returns on these acquisitions justify the reduction in cash reserves, especially given the cyclical nature of the semiconductor equipment industry.
Quick answers to the most common questions about buying ONTO stock.
Onto Innovation Inc. (ONTO) generated $328.3M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
Onto Innovation Inc. (ONTO) generated $299.8M 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.
Onto Innovation Inc. (ONTO) spent $28.5M 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, Onto Innovation Inc. (ONTO) spent $75.0M on share repurchases. This shows the company's commitment to returning capital to its equity investors.