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Companies / Utilities / Montauk Renewables, Inc.
MNTK

Montauk Renewables, Inc.

UtilitiesElectric, Gas & Water
Ticker MNTKPITTSBURGH, PAFiscal year ends DecemberBook value per share $1.84Diluted shares 143.9M

Montauk Renewables, Inc. (Nasdaq: MNTK) develops, owns and operates facilities that recover biogas from landfills and agricultural waste and convert it into renewable natural gas (RNG) or renewable electricity. RNG is principally sold for use as transportation fuel, while electricity is sold under long-term contracts;… From the company’s description.

Over the twelve months to Jun 30, 2026, Montauk Renewables, Inc. reported revenue of $189.10M, up 4.3% from a year earlier, and net income of $7.93M. Its operating margin was 0.6%, and operations generated $43.43M in cash. In fiscal 2025, it reported revenue of $176.38M, up 0.4% from fiscal 2024, and net income of $1.75M.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-06-30
Sales & profitability
$176.38MFY2025
+0.4% year over year
Last 12 mo $189.10M
0.48%FY2025
−8.7 percentage points
Last 12 mo 0.59%
$1.75MFY2025
−82.0% year over year
Last 12 mo $7.93M
0.66%FY2025
−3.6 percentage points
Last 12 mo 3.00%
Cash & financing
$30.33MFY2025
−30.7% year over year
Last 12 mo $43.43M
$-86.21MFY2025
−365.3% year over year
Last 12 mo $-83.37M
0.49FY2025
Was 0.22× a year earlier
Last 12 mo 0.57
143.1MFY2025
+0.5% year over year
Last 12 mo 143.9M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What Montauk Renewables, Inc. does

In the company’s own words

Montauk Renewables, Inc. (Nasdaq: MNTK) develops, owns and operates facilities that recover biogas from landfills and agricultural waste and convert it into renewable natural gas (RNG) or renewable electricity. RNG is principally sold for use as transportation fuel, while electricity is sold under long-term contracts; the company also monetizes environmental attributes, including renewable fuel credits, low-carbon fuel credits and renewable energy credits. Its customers and counterparties include landfill and livestock-farm operators, utilities, refiners and other natural-gas and energy-sector companies. Montauk reports its business through Renewable Natural Gas and Renewable Electricity Generation operations. At December 31, 2025, it owned and operated 13 projects: 11 RNG projects and two renewable electricity projects, with stated design capacities of approximately 35,522 MMBtu per day for RNG and 29.1 MW for electricity. Its projects span seven states and were developed through internal development, partnerships and acquisitions. The company has participated in the biogas industry for more than 30 years and has acquired 13 projects over the last decade.

Company details
Sector
Utilities
Industry (SIC)
Electric, Gas & Water
Headquarters
PITTSBURGH, PA
Fiscal year end
December
CIK
1826600
SIC
4932

Financial performance, year by year

Fiscal 2021–2025 · USD
$-25.54M$37.49M$100.52M$163.54M$226.57M20212022202320242025Last 12 moLast 12 monthsLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns Montauk Renewables, Inc. — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

105
funds hold it
0 of 35
superinvestors hold it
$16.60M
held by funds, at market
7.3%
of shares held by funds

Largest fund holders · Montauk Renewables, Inc.’s weight in each

VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.00%of fund net assets
iShares Russell 2000 ETF
IWM · iShares Trust
0.00%of fund net assets
Avantis U.S. Small Cap Value ETF
AVUV · American Century ETF Trust
—of fund net assets
VANGUARD EXTENDED MARKET INDEX FUND
VXF · VANGUARD INDEX FUNDS
0.00%of fund net assets
Fidelity Small Cap Index Fund
FSSNX · Fidelity Salem Street Trust
—of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Could not be determined for this company: bond issues.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

Connected research

Put this business in context.

Compare this company with peers, find it in your funds and follow its financial history with your connected AI:

  • “How do Montauk Renewables, Inc. and its peers compare on margins and cash generation over ten years?”
  • “Where did five years of Montauk Renewables, Inc.'s earnings go — cash, debt, buybacks, reinvestment?”
  • “What changed in Montauk Renewables, Inc.'s last four quarterly filings that the numbers alone won't show?”
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