Montauk Renewables, Inc.

What they do

Montauk captures biogas produced by anaerobic digestion at landfill and livestock sites, then processes it into RNG for transportation fuel or burns it to generate renewable electricity. The company secures biogas feedstock through long-term fuel supply and property lease agreements with site hosts. It monetizes both the energy commodity and the associated environmental attributes, such as Renewable Identification Numbers (RINs), under federal and state renewable programs.

Revenue drivers

• RNG sales — The largest contributor, Montauk sells RNG into the transportation market and self-markets a significant portion of its RINs; realized prices depend on D3 RIN index prices and forward sales commitments.
• Renewable Electricity — Two projects generate and sell renewable electricity, a smaller but steady revenue stream complementing the RNG portfolio.
• Environmental Attributes (RINs) — Monetization of RINs and other credits from RNG and electricity production provides a material, albeit volatile, revenue component tied to compliance market prices.

Recent performance

For the six months ended June 30, 2026, revenue rose 14% to $100.4 million from $87.7 million in the prior-year period. EBITDA increased 85% to $21.1 million, and net income attributable to common shareholders was $0.2 million compared to a $6.0 million loss a year earlier. Headline earnings were $1.1 million versus a $4.0 million loss, and basic and headline earnings per share were $0.00 and $0.01, respectively. Second-quarter 2026 revenue was $54.0 million, up from $43.4 million in the fourth quarter of 2025 and $45.3 million in the third quarter of 2025.

Strategy

Montauk is focused on expanding its RNG portfolio through development projects, including the Bowerman RNG Facility (estimated capacity 3,600 MMBtu/day, capital expenditure $85–$95 million, targeted for 2027–2028), the Tulsa RNG Facility (1,500 MMBtu/day, $25–$35 million), and the Rumpke RNG Relocation Project (7,500 MMBtu/day). The company also plans an Atascocita LCO2 Facility with estimated capital expenditure of $30–$40 million. It continues to evaluate agricultural feedstock opportunities and complementary acquisitions. No dividend was declared for the recent period in order to retain capital for these development efforts.

Risks

• RIN price volatility — Profitability is highly dependent on market prices for environmental attributes, particularly RINs; the average D3 RIN index price in Q2 2026 was approximately $2.54.
• Production variability — Biogas output can be disrupted by weather, equipment failures, or lower-than-expected landfill gas volumes, as seen with Hurricane Beryl in 2024 and dry conditions in 2023.
• Controlled company — Certain stockholders affiliated with two directors own approximately 52.3% of common stock and have entered a voting consortium agreement, limiting minority shareholder influence.
• Project execution — Development projects such as Bowerman, Tulsa, and Rumpke carry capital expenditure estimates of $85–$95 million, $25–$35 million, and unspecified amounts, with completion targeted for 2027–2028 and risk of cost overruns or delays.

Outlook

Management expects the development pipeline, including Bowerman and Tulsa, to contribute additional RNG capacity beginning in 2027–2028, though project timelines and costs are estimates. The company has not provided specific financial guidance but notes that profitability will continue to depend on RIN prices and operational performance.