Montauk Q2 2026 Earnings: RIN Revenue Drives a Return to Profit

Montauk Renewables (NASDAQ: MNTK) reported Q2 2026 revenue of $54.0 million, up 19.7% from $45.1 million a year earlier, while diluted EPS improved to $0.00 from a loss of $0.04. Net income turned positive at $0.2 million and adjusted EBITDA rose 144.5% to $12.3 million, with RIN-related revenue and GreenWave joint-venture income offsetting weaker commodity revenue and modest production growth.

Core financial results

Revenue increased by $8.9 million, primarily because Montauk sold RINs distributed by its GreenWave joint venture, which made no comparable distribution in Q2 2025. Total operating expenses also rose, partly reflecting $8.3 million of costs associated with GreenWave RIN distributions and RNG dispensing through proprietary pathways.

Lower general and administrative expenses and favorable maintenance timing helped narrow the operating loss. Below the operating line, $3.8 million of GreenWave joint-venture income was instrumental in moving Montauk from a net loss to a small profit.

Business and operating performance

RNG production reached 1.5 million MMBtu, increasing by 43,000 MMBtu, or 3%, from the prior-year quarter. McCarty production increased by 53,000 MMBtu following wellfield and collection-system improvements, while Apex added 39,000 MMBtu due to higher feedstock gas.

Those gains were partly offset by a 26,000 MMBtu decline at Galveston after the landfill host assumed responsibility for wellfield operations and maintenance. Atascocita production fell by 37,000 MMBtu because of project timing and planned maintenance.

Renewable electricity production increased to approximately 44,000 MWh from 42,000 MWh. Bowerman produced about 3,000 additional MWh as landfill wellfield improvements increased gas flows.

Montauk began generating electricity for sale at its Turkey, North Carolina facility in July 2026. The company identified programming modifications needed for the installed electrical switchgear and expects to complete them by mid-August to support higher production and protect processing equipment. Montauk had also signed long-term agreements covering at least 350,000 hog spaces by the end of July and was able to collect feedstock from more than 250,000 spaces, against a target of 400,000 to 450,000.

Profitability, cash flow and the balance sheet

Adjusted EBITDA margin was approximately 22.8%, compared with about 11.2% a year earlier. However, GAAP net income remained close to breakeven after $7.9 million of depreciation, depletion and amortization, $1.5 million of interest expense and $2.0 million of income tax expense.

RNG facility operating and maintenance expenses declined 8.2% to $15.6 million, mainly because of maintenance timing at McCarty and Apex. General and administrative expenses fell 15.2% to $7.7 million because Q2 2025 included $1.6 million of accelerated vesting expense for restricted share awards. Renewable Electricity Generation operating and maintenance expenses rose 5.3% to $5.1 million, including $1.2 million of non-capitalizable Montauk Ag project costs.

Cash-flow figures cover the first six months of 2026 rather than the quarter alone. Operating cash flow increased to $30.4 million from $17.3 million, but capital expenditures rose to $55.6 million from $45.3 million. Capital spending therefore exceeded operating cash flow by approximately $25.1 million during the period.

Cash and cash equivalents declined to $15.8 million at June 30 from $23.8 million at December 31, 2025. Total debt increased to approximately $149.6 million from $128.7 million over the same period as the company continued funding project investment.

RIN monetization, not production growth, drove the earnings recovery

The 19.7% revenue increase substantially exceeded the 3% rise in RNG production. RINs sold from operations increased 29.1% to 14.3 million, and GreenWave distributions supplied environmental attributes that had no comparable contribution in Q2 2025.

At the same time, RNG volumes sold under fixed- or floor-price contracts fell approximately 80% following contract expirations, while RNG commodity revenue declined about 63.7%. The resulting revenue mix was more dependent on environmental attributes than on commodity sales or production growth.

That RIN contribution also carried associated costs. Montauk recorded approximately $8.3 million of expenses related to GreenWave RIN distributions and pathway dispensing, limiting operating leverage and leaving the company near operating breakeven. The separate $3.8 million of GreenWave equity income then helped produce positive pretax and net income.

Full-year outlook

Montauk maintained its full-year RNG revenue and production outlook but reduced its Renewable Electricity Generation, or REG, outlook. The REG revision reflects the company’s current expectations for when revenue and generation will commence at the Montauk Ag Renewables facility.

Risks investors need to monitor

• Dependence on environmental attributes: Revenue growth was driven by RIN monetization even as commodity revenue fell sharply. Changes in RIN pricing, pathway economics or environmental-attribute regulation could therefore have a material effect on revenue and profitability.
• Montauk Ag execution: The reduction in REG guidance reflects the timing of the North Carolina project’s ramp. Switchgear modifications, feedstock collection installations and the move toward consistent output remain important operational milestones.
• Landfill wellfield performance: Improvements at McCarty, Apex and Bowerman increased output, but operational changes and maintenance reduced production at Galveston and Atascocita. Results remain sensitive to landfill-host collection systems and project timing.
• Capital spending and leverage: Six-month capital expenditures remained above operating cash flow, while cash declined and debt increased. Continued project investment could keep pressure on liquidity if operating cash generation does not rise accordingly.

Summary

Montauk’s Q2 2026 earnings recovery came primarily from RIN-related revenue, GreenWave joint-venture income and lower administrative costs rather than rapid production growth. Adjusted EBITDA and cash generation improved, but GAAP profitability remained close to breakeven and capital expenditures exceeded operating cash flow. The next key indicators are the Montauk Ag ramp, progress toward consistent electricity and REC generation, and whether RNG production and environmental-attribute monetization remain sufficient to support the unchanged full-year RNG outlook.