Aggressive capital deployment is outpacing internal cash generation, highlighted by a CAPEX-to-OCF ratio of 194.8% in 2026Q1 and a quarterly free cash flow deficit of $15.0M.
| Cash from Operations | 37.04M | 30.33M | 43.8M | 41.05M | 81.07M | 42.88M | 28.68M | 27.46M | 49.65M |
| Operating CF Growth % | 4115.99% | -30.74% | 6.68% | -49.36% | 89.06% | 49.49% | 4.44% | -44.69% | - |
| Operating CF / Revenue % | 20.55% | 17.2% | 24.92% | 23.47% | 39.44% | 28.95% | 28.57% | 25.98% | 43.14% |
| Net Income | 2.22M | 1.75M | 9.73M | 14.95M | 35.19M | -4.53M | 4.6M | 5.82M | 28.77M |
| Depreciation & Amortization | 32.08M | 29.97M | 23.52M | 21.57M | 20.7M | 22.87M | 23.73M | 23.06M | 16.2M |
| Deferred Taxes | -4.33M | -4.28M | 804K | 1.88M | 6.62M | 4.25M | -6.08M | -898K | 6.3M |
| Other Non-Cash Items | 5.31M | 5.46M | 949K | 3.19M | 3.48M | 1.54M | -480K | 1.15M | 3.58M |
| Working Capital Changes | -2.05M | -7.01M | -1.17M | -8.84M | 5.23M | -3.67M | 6.14M | -2.24M | -5.83M |
| Capital Expenditures | -135.78M | -116.54M | -62.32M | -63.09M | -22.28M | -19.47M | -17.65M | -45.25M | -40.16M |
| CapEx / Revenue % | 75.35% | 66.07% | 35.46% | 36.07% | 10.84% | 13.15% | 17.58% | 42.8% | 34.9% |
| CapEx / D&A | 4.23x | 3.89x | 2.65x | 2.93x | 1.08x | 0.85x | 0.74x | 1.96x | 2.48x |
| CapEx Coverage (OCF/CapEx) | 0.27x | 0.26x | 0.70x | 0.65x | 3.64x | 2.20x | 1.63x | 0.61x | 1.24x |
| Cash from Investing | -139.69M | -120.49M | -62.19M | -63.09M | -20.79M | -19.47M | -15.99M | -44.57M | -52.86M |
| Acquisitions | -1.98M | 0 | 0 | 0 | 1.09M | -9.67M | 0 | 300K | -14.3M |
| Purchase of Investments | -1.98M | -4M | 0 | 0 | 0 | 0 | 0 | -300K | 0 |
| Sale of Investments | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 300K | 0 |
| Other Investing | 55K | 55K | 132K | 4K | 395K | 185K | 1.66M | 383K | 1.6M |
| Cash from Financing | 90.83M | 68.34M | -9.84M | -9.33M | -8.28M | 8.65M | -1.5M | -27.52M | 34.23M |
| Dividends Paid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -11.76M |
| Dividend Payout Ratio % | - | - | - | - | - | - | - | - | 40.87% |
| Debt Issuance (Net) | 2M | 1000K | -1000K | -1000K | -1000K | 1000K | -1000K | -1000K | 1000K |
| Stock Issued | 5K | 5K | 6K | 4K | 6K | 15.59M | 0 | 0 | 0 |
| Share Repurchases | -419K | -419K | -1.78M | -122K | -238K | -10.81M | 0 | -74K | 0 |
| Other Financing | -5.07M | -4.18M | 0 | -1.14M | 0 | -9.43M | 0 | -638K | -2.35M |
| Net Change in Cash | -11.81M | -21.81M | -28.24M | -31.36M | 51.99M | 32.05M | 11.2M | -44.62M | 31.03M |
| Exchange Rate Effect | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Cash at Beginning | 24.19M | 46M | 74.24M | 105.61M | 53.61M | 21.56M | 10.36M | 54.98M | 23.95M |
| Cash at End | 28.68M | 24.19M | 46M | 74.24M | 105.61M | 53.61M | 21.56M | 10.36M | 54.98M |
| Free Cash Flow | -98.74M | -86.21M | -18.53M | -22.04M | 58.79M | 23.41M | 11.04M | -17.79M | 9.49M |
| FCF Growth % | -640.93% | -365.28% | 15.93% | -137.49% | 151.18% | 112.04% | 162.06% | -287.41% | - |
| FCF Margin % | -54.79% | -48.88% | -10.54% | -12.6% | 28.6% | 15.8% | 11% | -16.82% | 8.25% |
| FCF / Net Income % | -4453.63% | -4931.81% | -190.34% | -147.43% | 167.04% | -516.89% | 239.8% | -305.58% | 32.99% |
Regulatory credit price volatility
According to quarterly financial data, MNTK consistently reports negative free cash flow, with CAPEX-to-OCF ratios frequently exceeding 100%, such as the 194.8% observed in 2026Q1, indicating that the company is aggressively reinvesting in infrastructure to sustain its landfill gas conversion capacity despite volatile operating cash inflows.
The high intensity of capital expenditure relative to operating cash flow suggests that MNTK is in a heavy growth phase, prioritizing the expansion of its renewable infrastructure over immediate cash generation. Investors should monitor whether these investments in conversion technology will eventually yield the expected operational efficiencies or if they will continue to pressure liquidity in the absence of stable credit pricing.
Based on reported figures, MNTK maintains a conservative debt profile with minimal reliance on external leverage, yet the persistent free cash flow deficit, which reached $41.1M in 2025Q4, necessitates careful management of capital resources to ensure ongoing project development without compromising the company's long-term solvency.
The company's ability to navigate periods of negative free cash flow without significant debt accumulation appears to be a strategic choice, though it limits the financial cushion available during market downturns. The reliance on periodic capital adjustments suggests that management is sensitive to the cost of capital, potentially constraining the pace of future project rollouts.
As indicated by the discrepancy between net income and operating cash flow in periods like 2025Q2, where net income was -$5.5M while OCF remained positive at $8.2M, MNTK's cash generation is significantly decoupled from GAAP earnings due to non-cash charges and the timing of environmental credit monetization.
This divergence highlights that GAAP net income is a poor proxy for the company's actual liquidity, as the timing of RIN and LCFS credit sales can create artificial volatility in reported earnings. Analysts should focus on the underlying cash-generation capacity of the assets rather than headline profit figures, which may be heavily influenced by accounting adjustments.
Analysis of the cash flow statement suggests that MNTK's reliance on environmental credit inventory, as noted in recent SEC filings, masks the underlying operational risks associated with feedstock degradation and the potential for future decommissioning costs that are not currently reflected in the cash burn rate.
The current cash flow structure may be underestimating the long-term maintenance requirements of aging landfill sites, which could lead to unexpected capital outflows. Investors should remain cautious, as the lack of explicit disclosure regarding future environmental remediation obligations may leave the company vulnerable to sudden shifts in regulatory requirements or site-specific operational failures.
Quick answers to the most common questions about buying MNTK stock.
Montauk Renewables, Inc. (MNTK) generated $30.3M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.
Montauk Renewables, Inc. (MNTK) reported negative free cash flow of $86.2M in 2025, indicating capital requirements exceeded cash from operations.
Montauk Renewables, Inc. (MNTK) spent $116.5M 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, Montauk Renewables, Inc. (MNTK) spent $0.4M on share repurchases. This shows the company's commitment to returning capital to its equity investors.