Free cash flow turned positive at $12.1M in 2026Q2 (6.5% margin), but stock-based compensation of $28.9M exceeded operating cash flow, suggesting cash generation is partly non-cash.
Glaukos Corporation (GKOS) cash flow statement — 14-year operating, investing & financing cash flows
| 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 |
|---|
| Cash from Operations | -950K | -46.34M | -61.32M | -57.76M | -33.08M | 24.71M | -22.99M | -369K | 18.86M | 25.51M | 12.31M | -2.19M | -7.11M | -13.3M | -20.45M |
| Operating CF Margin % | - | -9.13% | -15.99% | -18.35% | -11.7% | 8.4% | -10.22% | -0.16% | 10.41% | 16.02% | 10.76% | -3.05% | -15.59% | -63.52% | -842.12% |
| Operating CF Growth % | 1389.21% | 24.43% | -6.16% | -74.59% | -233.9% | 207.48% | -6129.81% | -101.96% | -26.05% | 107.23% | 662.57% | 69.21% | 46.58% | 34.95% | - |
| Net Income | -188.05M | -133.66M | -146.37M | -134.66M | -99.19M | -49.59M | -120.35M | 15.42M | -12.95M | -92K | 4.52M | -38.32M | -14.06M | -14.23M | -19.33M |
| Depreciation & Amortization | 42.19M | 38.09M | 39.92M | 37.98M | 35.95M | 34.42M | 34.61M | 9.86M | 6.26M | 5.48M | 4.72M | 4.27M | 4.23M | 1.16M | 638K |
| Stock-Based Compensation | 80.22M | 63.22M | 50.21M | 43.53M | 38.56M | 30.15M | 46.48M | 0 | 25.7M | 17.59M | 8.79M | 7.89M | 1.53M | 1.35M | 1.01M |
| Deferred Taxes | -6.47M | -6.49M | -216K | -120K | -54K | -1.03M | -12.18M | -66.31M | 1.51M | -925K | 575K | 27.05M | -5K | -165K | 0 |
| Other Non-Cash Items | 78.05M | 24.04M | 34.62M | 5.65M | 5.11M | 7.19M | 31.67M | 45.12M | 1.92M | 722K | -31K | 298K | -33K | 24K | -1.76M |
| Working Capital Changes | -6.89M | -31.55M | -39.47M | -10.13M | -13.45M | 3.58M | -3.22M | -4.47M | -3.58M | 2.73M | -6.26M | -3.38M | 1.23M | -1.44M | -1.14M |
| Change in Receivables | -60.95M | -53.02M | -21.97M | -3.84M | -3.14M | 1.7M | 2.24M | -6.63M | -2.25M | -2.18M | -6.79M | -2.16M | -2.51M | -2.34M | -456K |
| Change in Inventory | 9.43M | 2.65M | -18.79M | -4.83M | -15.47M | -7.7M | 1.96M | 4.08M | -2.3M | -4.16M | -2.94M | -1.85M | -413K | -938K | -686K |
| Change in Payables | 21.13M | 18.82M | 21K | 1.3M | 7.21M | 12.45M | -2.68M | 779K | 771K | 9.23M | 5.1M | 1.52M | 4.12M | 1.87M | 0 |
| Cash from Investing | -14.69M | -77.61M | 47.83M | 14.1M | 44.78M | -58.23M | -205.06M | 43.43M | -26.4M | -11.73M | -26.12M | -85.63M | -868K | -958K | 6.06M |
| Capital Expenditures | -11.25M | -7.67M | -6.3M | -20.25M | -30.27M | -47.78M | -6.93M | -4.72M | -10.31M | -6.31M | -6.28M | -877K | -868K | -852K | -533K |
| CapEx % of Revenue | 1.84% | 1.51% | 1.64% | 6.43% | 10.7% | 16.25% | 3.08% | 1.99% | 5.69% | 3.96% | 5.49% | 1.22% | 1.9% | 4.07% | 21.94% |
| Acquisitions | -12.44M | -12.44M | 38K | 0 | 151K | 3K | 0 | 49.65M | 1.24M | 11.7K | 0 | -15M | 0 | 0 | 0 |
| Investments | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Other Investing | 6.61M | -22.16M | -3.15M | -3.17M | -1.01M | -2.08M | -1.82M | -1.61M | -1.24M | -11.7K | -19.84M | -15M | 0 | -106K | 6.59M |
| Cash from Financing | 24.41M | 11.89M | 91.54M | 15.04M | 6.25M | 39.26M | 262.54M | -9.64M | 21.58M | 4.67M | -1.64M | 107.11M | 3.5M | 19.26M | 10.54M |
| Debt Issued (Net) | 526K | -1.12M | 51.34M | -711K | -527K | -659K | 242.21M | -22.5M | 0 | 0 | -9.7M | -7.95M | 1.85M | 0 | 0 |
| Equity Issued (Net) | 10.98M | 21.14M | 46.76M | 19.03M | 9.21M | 30.94M | 24.22M | 18.45M | 0 | 0 | 0 | 0 | 0 | 19.09M | 0 |
| Dividends Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Share Repurchases | -2.79M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -587K | 0 | 0 | 0 | 0 | -132K | 0 |
| Other Financing | 12.9M | -8.13M | -6.56M | -3.27M | -2.43M | 8.98M | -3.89M | -5.6M | 21.58M | 4.67M | 8.05M | 115.06M | 1.65M | 162K | 10.54M |
| Net Change in Cash | 12.91M | -111.26M | 76.16M | -26.06M | 18.82M | 4.11M | 34.17M | 32.61M | 14.09M | 18.01M | -15.08M | 19.27M | -4.42M | 5M | -3.85M |
| Free Cash Flow | -12.2M | -54.01M | -67.62M | -78.01M | -63.35M | -23.08M | -29.92M | -5.09M | 8.55M | 19.2M | 6.03M | -3.06M | -7.97M | -14.16M | -20.99M |
| FCF Margin % | -1.99% | -10.64% | -17.63% | -24.79% | -22.4% | -7.85% | -13.3% | -2.15% | 4.72% | 12.05% | 5.27% | -4.27% | -17.49% | -67.59% | -864.06% |
| FCF Growth % | 54.7% | 20.13% | 13.32% | -23.14% | -174.51% | 22.88% | -487.53% | -159.57% | -55.47% | 218.31% | 296.77% | 61.57% | 43.67% | 32.55% | - |
| FCF per Share | -0.21 | -0.94 | -1.28 | -1.61 | -1.34 | -0.50 | -0.67 | -0.12 | 0.24 | 0.56 | 0.17 | -0.18 | -0.32 | -0.57 | -10.57 |
| FCF Conversion (FCF/Net Income) | 0.06x | 0.25x | 0.42x | 0.43x | 0.33x | -0.50x | 0.19x | -0.02x | -1.46x | -277.26x | 2.72x | 0.06x | 0.59x | 1.05x | 1.06x |
| Interest Paid | 1.39M | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 285K | 834K | 876K | 75K | 0 |
| Taxes Paid | 633K | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 401K | 12K | 513K | 25K | 12K | 4K | 0 |
Quick answers to the most common questions about buying GKOS stock.
Glaukos Corporation (GKOS) generated $-46.3M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
Glaukos Corporation (GKOS) reported negative free cash flow of $54.0M in 2025, indicating capital requirements exceeded cash from operations.
Glaukos Corporation (GKOS) spent $7.7M on capital expenditures in 2025. CapEx represents the cash invested in physical assets like property, plant, and equipment to maintain or grow the business.
Key Metrics
Top Statement Risk
Persistent operating losses
Metrics are mathematically derived from official filings.
Cash Conversion Diverges from Losses
Despite persistent net losses, GKOS generated positive operating cash flow in 2026Q2, with OCF/NI at -0.81, indicating non-cash charges and working capital swings are masking underlying cash generation.
The gap between net income and operating cash flow is stark: in 2026Q2, net loss of $18.4M contrasts with $14.8M operating cash flow, driven by $28.9M in stock-based compensation and $11.2M in D&A. This suggests that while GAAP losses persist, cash burn is less severe than reported, though the negative OCF/NI ratio in most quarters indicates that working capital outflows often offset these non-cash add-backs.
FCF Turns Positive but Volatile
Free cash flow swung to positive $12.1M in 2026Q2, a sharp reversal from negative $16.5M in 2026Q1, per reported figures, yet FCF margin remains thin at 6.5% and historically negative.
The trajectory shows improvement: FCF margin improved from -40.7% in 2024Q1 to 6.5% in 2026Q2, but this is highly volatile quarter-to-quarter, with negative FCF in five of the last ten quarters. The positive FCF in 2026Q2 appears driven by a favorable working capital swing, not sustainable operational gains, as revenue growth accelerates but cash conversion remains inconsistent.
Capital Intensity Remains Low
CapEx averaged only 1.6% of revenue over the last ten quarters, per financial statements, indicating a light-asset model where growth is not capital-intensive, but this may understate investment in intangible assets.
With CapEx/Revenue consistently below 3%, GKOS's capital expenditure is minimal relative to its revenue base, suggesting that the company's growth is driven more by R&D and commercial expenses than physical assets. This low capital intensity supports positive FCF potential, but investors should monitor whether capitalized development costs are understating true investment.
Working Capital Swings Drive Cash Flow
Working capital changes have been a major source of volatility, with a positive $45.9M swing in 2025Q4 and negative $23.8M in 2026Q1, as reported, indicating significant timing effects in collections and payables.
The working capital line is the primary driver of quarterly cash flow variability, with large swings in both directions. This suggests that GKOS's cash flow is heavily influenced by the timing of receivables and inventory, which may obscure the underlying operational cash generation. Investors should focus on the trend in operating cash flow excluding working capital to assess true earnings quality.
Minimal Capital Returns, Focus on Growth
GKOS paid no dividends and repurchased only $2.8M in shares in 2026Q2, per cash flow data, indicating that all available cash is being reinvested into the business to support its accelerating revenue growth.
Capital deployment is almost entirely directed toward organic growth, with negligible buybacks and no dividends. The small buyback in 2026Q2 may be opportunistic, but the overall pattern suggests management is prioritizing investment in R&D and commercialization over returning capital to shareholders, consistent with the company's early-stage profitability profile.
SBC Inflates Cash Flow Metrics
Stock-based compensation totaled $28.9M in 2026Q2, exceeding operating cash flow, per reported figures, suggesting that reported cash flow is significantly bolstered by non-cash equity compensation that dilutes shareholders.
While SBC is a non-cash expense, it represents a real economic cost to shareholders through dilution. In 2026Q2, SBC alone was nearly double the operating cash flow, implying that if SBC were treated as a cash expense, GKOS would still be burning cash. This warrants caution when interpreting the positive FCF, as the true cash cost of employee compensation is higher than reported.