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Montauk Renewables, Inc.: what insiders have been doing
Every trade that managers of Montauk Renewables, Inc. disclose to SEC (Form 4) is tracked on this page. The company sits in the Energy sector. In the past year (22 October 2025 to 22 October 2026), 2 filings came from 2 insiders.
None of the filings is a plain purchase or sale on the open market; they cover grants, option exercises and other movements. Grants and option exercises follow pay plans set in advance, so they reveal less about an insider's own view than a purchase made with personal money.
There has been no open-market purchase by an insider of Montauk Renewables, Inc. for at least a year.
Across the 3,171 companies tracked on its exchange, the median is 24 filings; at 2 filings, this issuer sits below that mark. The full history, which starts in 2021, counts no purchases against 4 sales. The 10-K for the year ended 31 December 2025 shows 176.4 m USD of revenue and 1.7 m USD of net income.
For comparison within the same sector, see the insider buying recorded at AXIA Energia S.A. and RGC Resources Inc. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Insider Decl.
32
Thresholds
n/a
Buy Volume
n/a
n/a
Sell Volume
€2M
4 ops. · all time
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Fundamental score
Ranked 20,579 of 26,280 companies
32.0
score / 100
Value27
Quality37
FCF yld-29%
Earn yld0.6%
EV/EBITDA13.5x
ROE3.1%
Gross mgn37%
Net mgn1.0%
Debt/EBITDA4.3x
Pillars2/3
Transparent value + quality ranking, distinct from the insider signal.
Financial data
as of FY 2025FY ended December 2025 · cache
US$2.11
Analyst consensus
3 analysts3.00/5
US$1.50Target US$1.70(-19%)US$2.00
Income statement
RevenueUS$176.4M
Gross profitUS$65.8M37% margin
EBITDAUS$32.3M18% margin
Net incomeUS$1.7M4.2% margin
Valuation
PER (trailing)35.1x
PER (forward)6.9x
P/Book1.1x
Beta0.66
Balance sheet & cash
Market capUS$299.6M
Total debtUS$137.9M
Free Cash Flow-US$86.2M
Debt / Equity59%
Profitability & ownership
ROE3.1%
ROA0.7%
% insiders70.1%
% institutions19.1%
Last declaration on 22 May 2026
Declarations32 total
302,982 shares0Common StockSEC:0000950103-26-007657:0
2,748 shares@ US$1.676.1% of flowCommon StockSEC:0001193125-25-300816:0
2,748 shares@ US$4.4618.0% of flowCommon StockSEC:0000950170-24-131181:0
2,658 shares@ US$9.0934.1% of flowCommon StockSEC:0000899243-23-020496:0
2,748 shares@ US$10.0140.6% of flowCommon StockSEC:0000899243-22-037610:0
2,350 shares@ US$12.681.0% of flowCommon StockSEC:0000899243-22-037151:1
2,250 shares@ US$12.680.8% of flowCommon StockSEC:0000899243-22-037150:1
101,797 shares@ US$12.0299.9% of flowCommon StockSEC:0000899243-22-037151:0
57,750 shares@ US$12.0799.9% of flowCommon StockSEC:0000899243-22-037150:0
87 shares@ US$10.010.1% of flowCommon StockSEC:0000899243-22-003877:0
87 shares@ US$10.01100.0% of flowCommon StockSEC:0000899243-22-003872:0
87 shares@ US$10.01100.0% of flowCommon StockSEC:0000899243-22-003875:0
87 shares@ US$10.011.2% of flowCommon StockSEC:0000899243-22-003871:0
87 shares@ US$10.010.1% of flowCommon StockSEC:0000899243-22-003874:0
87 shares@ US$10.01100.0% of flowCommon StockSEC:0000899243-22-003873:0
50,000 shares0Common StockSEC:0000899243-21-046410:0
264 shares0Common StockSEC:0000899243-21-003760:0
371,504 shares0Common StockSEC:0000899243-21-003760:1
264 shares0Common StockSEC:0000899243-21-003762:0
317,121 shares0Common StockSEC:0000899243-21-003762:1
264 shares0Common StockSEC:0000899243-21-003765:0
354,161 shares0Common StockSEC:0000899243-21-003765:1
264 shares0Common StockSEC:0000899243-21-003764:0
695,889 shares0Common StockSEC:0000899243-21-003764:1
313,455 shares@ US$11.3881.4% of flowCommon StockSEC:0000899243-21-003764:2
25 of 32 declarations
About Montauk Renewables, Inc.
Montauk Renewables, Inc. is a United States-based renewable energy company listed on the NASDAQ under the ticker MNTK. Its core business is the capture, recovery, and processing of biogas from landfills and other non-fossil sources, which it converts into Renewable Natural Gas (RNG) and, in some cases, renewable electricity. For French-, Belgian-, and Swiss-based investors, Montauk sits in a specialized part of the energy transition value chain, with economics that are closely tied to environmental attributes and U.S. federal and state incentive frameworks. ([ir.montaukrenewables.com](https://ir.montaukrenewables.com/investor-relations/?utm_source=openai))
Montauk emphasizes a long operating history in landfill-gas-to-energy projects, with roots going back more than 30 years. The company’s website traces part of its heritage to Getty Synthetic Fuels, which built a landfill gas-to-energy plant in Chicago in 1980, and later to GSF Energy, which Montauk acquired in the 1990s. Today, Montauk is structured around an operating portfolio of RNG and renewable electricity assets built through self-development, partnerships, and acquisitions. Its principal executive office is in Pittsburgh, Pennsylvania, United States, and the company also maintains regional offices, including in Texas and California. ([montaukrenewables.com](https://montaukrenewables.com/?utm_source=openai))
Read moreShow less
Operationally, Montauk designs, owns, and operates projects that capture methane, prevent it from entering the atmosphere, and turn it into saleable energy products and environmental credits. That makes the business model dual-exposed: revenue depends not only on energy output, but also on the pricing of environmental attributes, including RINs in the U.S. market. Management describes Montauk as one of the larger U.S. producers of RNG, with assets spread across multiple states, giving the company a geographically diversified footprint within the domestic market. ([sec.gov](https://www.sec.gov/Archives/edgar/data/1826600/000095017024031587/mntk-20231231.htm?utm_source=openai))
Montauk’s main business lines include RNG from landfill biogas, renewable electricity generation, and agricultural-waste-related projects. The company expanded its agricultural waste segment through the acquisition of NR3, a technology platform focused on converting agricultural waste streams into renewable energy solutions. This broadens the company’s feedstock exposure beyond landfills and supports a strategy aimed at scaling decarbonization projects across multiple end markets. ([ir.montaukrenewables.com](https://ir.montaukrenewables.com/news-releases/news-release-details/montauk-renewables-inc-expands-agricultural-waste-segment/?utm_source=openai))
Recent developments underscore both the growth potential and the volatility of the model. In its first-quarter 2025 results, Montauk reported higher revenue year over year while RNG production was broadly flat, and management highlighted that profitability remains highly dependent on environmental attribute prices. The company also continued to communicate about project execution and adjacent opportunities such as CO2 monetization and Power-to-X-related initiatives. In practical terms, MNTK is best viewed as a small-to-mid cap clean energy operator with meaningful exposure to policy, commodity-like environmental credit markets, weather-related disruptions, and project delivery risk. ([ir.montaukrenewables.com](https://ir.montaukrenewables.com/news-releases/news-release-details/montauk-renewables-announces-first-quarter-2025-results?utm_source=openai))
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