Maas Energy Holdings

What Maas Energy Holdings does

Maas Energy Works (MEW) is a developer, owner, and operator of dairy-based anaerobic digester and renewable natural gas (RNG) projects in the United States. Founded in 2010 by Daryl Maas in Redding, California, the company designs, finances, builds, and operates turnkey biogas systems on dairy farms across nine states (California, Idaho, Iowa, Georgia, Kansas, Nebraska, South Dakota, Texas, and Wisconsin), converting livestock manure and organic waste into pipeline-quality RNG, transportation fuel, electricity, and emerging hydrogen products. MEW operates the largest U.S. fleet of dairy digesters with 90+ operational facilities, 25+ in construction or development, 185+ miles of biogas pipeline, and 13 electrical gensets, employing 220+ staff in a vertically integrated model that includes wholly-owned divisions Maas Motor Works (power generation packaging, controls, metal fabrication) and Goose Works (biogas cleanup facility design and manufacturing).

MEW's revenue model spans RNG production and sales (primarily through off-take with Clean Energy Fuels Corp. via 600+ fueling stations), biogas-powered electricity generation via gensets under net metering or Power Purchase Agreements, bundled design/construction/O&M services delivered through project development agreements with dairy farms, and capture of federal renewable energy tax credits (Section 48 ITC, Section 45Z Clean Fuel Production Credit), RINs, and California LCFS credits. Pricing is structured through bespoke multi-year agreements with farm partners and joint development agreements with off-takers; no standardized pricing is published. Customer segments include dairy farm SMBs (primary host partners), enterprise off-takers such as Clean Energy Fuels Corp. and Calgren Dairy Fuels, natural gas utilities (PG&E, SoCalGas, Atmos Energy) receiving pipeline-interconnected RNG, and emerging hydrogen mobility players via the Utility Global partnership. Go-to-market is enterprise field sales with site managers and regional operations directors coordinating multi-state development, complemented by channel partnerships for distribution and technology integration.

MEW is a family-owned private company that has secured over $600 million in cumulative financing since inception through grants, private capital, bank loans, and government-guaranteed loans, with CFO Stephen Hatley leading capital structuring. Recent strategic actions include the May 2024 Clean Energy nine-facility joint development agreement, the October 2025 Utility Global dairy-to-hydrogen partnership, the February 2026 commissioning of the Couco Creek hub-style RNG interconnection with PG&E, the September 2025 Lakeside Pipeline solar self-power project, and expanded monitoring partnerships with Qube and EMPact Technologies. The company is positioned as the most experienced U.S. dairy digester developer, with the claim that every digester it has developed remains in operation.

Name

Maas Energy Holdings

Legal name

Maas Energy Works, LLC

Website

https://maasenergy.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

101–250 employees

Short description

Maas Energy Works is a family-owned developer, owner, and operator of dairy-based anaerobic digester and renewable natural gas projects across nine U.S. states. It operates the largest U.S. fleet of 90+ dairy digesters, serving dairy farmers, utility off-takers, and transportation fuel distributors.

Ownership category

akta.pro rank

Product category

Renewable Natural Gas Development

NAICS

Agricultural Implement Manufacturing (33311), Oil and Gas Field Machinery and Equipment Manufacturing (333132), Agriculture, Construction, and Mining Machinery Manufacturing (3331)

SIC

Agricultural Services (700), Cogeneration Services & Small Power Producers (4991), Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Biogas/RNG Plant Development, EPC & Project Delivery (EUAAAEAH)

akta.pro secondary industries

Biogas/RNG Plant Operations, Maintenance & Asset Management (EUAAAEAI), Anaerobic Digestion (AD) & Biogas/RNG Production (Organics Feedstocks) (BPALAEAC), RNG Offtake, Marketing & Environmental Attributes (RINs/LCFS/Guarantees of Origin) (EUAAAEAG), Anaerobic Digestion Biogas Power (Agricultural & Industrial AD) (EUACAIAD), Manure & Nutrient Management (On-Farm) (AFAEACAH)

Keywords

• Anaerobic digester development
• Renewable natural gas
• Biogas project operations
• Dairy methane capture
• RNG infrastructure development

Headquarters

HQ city

Redding

HQ country

United States

HQ region

North America

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. RNG Production & Sales: MEW develops, owns, and operates dairy anaerobic digesters that convert livestock waste to pipeline-quality RNG. Revenue is generated by selling RNG as a negative-carbon-intensity transportation fuel to off-takers such as Clean Energy Fuels Corp. RNG is injected into utility pipelines (PG&E, SoCalGas, Atmos Energy) and distributed as vehicle fuel, electricity generation, or heat. The company earns revenue from environmental commodities including LCFS credits and RINs.
2. Renewable Energy Tax Credits & Incentives: MEW manages Section 48 Investment Tax Credit (ITC) and Section 45Z Clean Fuel Production Credit compliance and substantiation. The company coordinates with external tax advisors on placed-in-service analysis, documentation, credit registration, and claims. Property tax and sales/use tax compliance across a multi-entity portfolio of ~100 legal entities supports these incentives.
3. Biogas-Powered Electricity Generation: MEW operates biogas-powered electric generation systems (gensets) for net metering or Power Purchase Agreement sales. The Maas Motor Works division packages turn-key power generation units.
4. Design, Construction & O&M Services: MEW handles full project delivery including design & procurement, financing, permits, equipment manufacturing & design, construction management, and ongoing operations & maintenance for dairy-based anaerobic digester and RNG projects. Services are bundled into project development agreements with dairy farm partners.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

Maas Energy Holdings (operating as Maas Energy Works, MEW) develops, owns, and operates dairy-based anaerobic digester and renewable natural gas (RNG) projects across key US agricultural regions. The company works directly with dairy farm families to design, finance, build, and manage turnkey biogas systems that convert livestock manure and organic waste into pipeline-quality RNG, transportation fuel, electricity, and hydrogen. As a developer-owner-operator, MEW provides end-to-end project delivery including design and procurement, financing, permits, equipment manufacturing, construction management, ongoing operations and maintenance, and environmental commodities compliance.

Product overview

Maas Energy Works operates as a developer-owner-operator of dairy-based anaerobic digester and renewable natural gas projects. The company's portfolio consists of its core Dairy Anaerobic Digester Projects (over 90+ facilities across nine states), supplemented by two specialized divisions: Maas Motor Works (power generation systems packaging) and Goose Works (biogas cleanup facility design and manufacturing). Infrastructure includes pipeline hubs such as Lakeside Pipeline and Merced Pipeline that aggregate biogas from multiple farms for conditioning and pipeline injection. The company also offers environmental commodities compliance and reporting, operations and maintenance, and design/procurement/construction management services.

Differentiator

Problem solved

Functional benefit

Brands

• Maas Motor Works: Division that packages power generation systems for net metering, sales via Power Purchase Agreement, backup power using open source equipment and software.
• Goose Works

Products and services

• Dairy Anaerobic Digester Projects Turnkey anaerobic digester development for dairy farms that converts livestock manure into biogas, which is upgraded to pipeline-quality renewable natural gas (RNG). MEW finances, builds, owns, and operates the systems on partner farms across CA, ID, IA, GA, KS, NE, SD, TX, and WI, enabling dairy farm operators to capture methane emissions and earn revenue without capital outlay.
• Maas Motor Works (MMW) Power Generation Systems Division of MEW that designs, packages, and delivers turn-key biogas-powered electrical generation systems (gensets) for net metering, Power Purchase Agreement sales, or backup power. Built with open-source equipment and software prioritizing serviceability and commonly available parts, serving dairy farms and biogas operators.
• Goose Works Biogas Cleanup Facilities Division of MEW that designs, manufactures, and deploys proprietary biogas cleanup and conditioning facilities. The systems enhance biogas quality for pipeline injection and downstream fuel applications, enabling MEW to vertically integrate gas processing for its dairy digester portfolio.
• Lakeside Pipeline Hub Centralized dairy biogas upgrading facility located near Hanford, California that aggregates and conditions biogas from more than 10 dairy farms. The hub purifies and compresses biogas for injection into the natural gas pipeline and is now powered primarily by a 17.5-acre on-site solar installation.
• Renewable Natural Gas (RNG) Production & Supply Pipeline-quality renewable natural gas produced by upgrading dairy-derived biogas at MEW's conditioning facilities. Sold as a negative-carbon-intensity transportation fuel to off-takers such as Clean Energy Fuels Corp. and injected into utility natural gas pipelines for use as vehicle fuel, electricity generation, or heat.

Quantifiable outcome

• 60% reduction in methane emissions per participating cow
• +9 more outcomes

Named customers23 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature7 records

Partnerships

14 partnerships are on record, tiered core, strategic and minor.

• EMPact TechnologiescoreTechnology or Integration · 16 March 2026EMPact Technologies signed a six-year compliance partnership with MEW to provide environmental monitoring and reporting services for 56 renewable energy projects focused on biogas and methane capture. This partnership supports regulatory compliance across MEW's portfolio of dairy digester facilities.
• KyocerastrategicStrategic or Co-development Partner · 17 February 2026Kyocera is listed as a strategic partner in Utility Global's $100M Series D announcement for global commercial deployment of the H2Gen platform, which includes the MEW dairy digester-to-hydrogen project in California.
• Symbio North America CorporationstrategicStrategic or Co-development Partner · 17 February 2026Symbio North America Corporation is listed as a strategic partner in Utility Global's $100M Series D announcement for global commercial deployment of the H2Gen platform, which includes the MEW dairy digester-to-hydrogen project in California.
• ArcelorMittalstrategicStrategic or Co-development Partner · 17 February 2026ArcelorMittal is listed as a strategic partner in Utility Global's $100M Series D announcement for global commercial deployment of the H2Gen platform targeting hard-to-abate industrial sectors including steel.
• Pacific Gas and Electric Company (PG&E)coreStrategic or Co-development Partner · 9 February 2026MEW collaborated with PG&E to commission a new RNG facility at Couco Creek Dairy in Turlock, CA, interconnected with PG&E's natural gas pipeline system. The facility injects approximately 350 MMBtu/day of RNG into the PG&E pipeline, contributing to California's climate goals. This is a core infrastructure partnership enabling RNG offtake into the utility network.
• Blue Sky DairyminorStrategic or Co-development Partner · 9 February 2026Blue Sky Dairy (Turlock, CA) supplies trucked-in RNG to MEW's Couco Creek hub facility through a dedicated offloading and decompression facility. This virtual pipeline arrangement enables Blue Sky Dairy to participate in the RNG ecosystem without direct pipeline access.
• Utility GlobalstrategicStrategic or Co-development Partner · 7 October 2025MEW and Utility Global announced an agreement to develop California's first dairy digester biogas to hydrogen fuel project. The project integrates MEW's dairy digester biogas systems with Utility's proprietary H2Gen technology to produce deeply carbon-negative hydrogen (expected output: three tons per day) for heavy-duty transportation. The project has secured initial off-take at attractive pricing. In February 2026, Utility Global raised a $100M Series D (first close) to accelerate deployment including the MEW partnership across the Americas, Europe, and Asia.
• Bernard TeVelde (Lakeside Pipeline Partner / Dairy Farmer)coreStrategic or Co-development Partner · 1 September 2025Bernard TeVelde is a dairy farmer partner and Lakeside Pipeline co-developer who provided land for the 17.5-acre solar installation powering the Lakeside Pipeline biogas upgrading facility. TeVelde noted 'Over 207 California dairies operate solar fields. This project represents the country's first large-scale dairy biogas facility almost fully powered by solar energy.'
• Fernandes Family FarmscoreStrategic or Co-development Partner · 15 June 2025Fernandes Family Farms (Tulare County, CA) operates four digesters across four dairies (Fern Oaks, Legacy Ranch, LegenDairy Farms, Sousa & Sousa) as part of the Calgren Dairy Fuels Cluster. The four projects received $5.3 million through the CDFA Dairy Digester Research and Development Program (DDRDP). Most digesters were built by MEW.
• Qube TechnologiescoreTechnology or Integration · 1 January 2025MEW expanded its partnership with Qube Technologies to deploy continuous environmental monitoring devices across 20 lagoon-style digesters spanning operations in Texas, Idaho, and California. Qube's low-cost monitoring solution provides real-time emissions data, automated alerts, and an operational dashboard. Early results show one digester increased monthly MMBTU production by over 30% and multiple sites achieved faster leak detection and lower emissions releases.
• Volleman's Family FarmcoreStrategic or Co-development Partner · 20 June 2024Volleman's Family Farm (Merced County, CA) partnered with MEW to construct a custom biogas facility using covered lagoon and membrane technology. The facility processes manure from over 5,000 cows into RNG via a 3.5-mile underground pipeline to Atmos Energy. A ribbon-cutting ceremony was held June 20, 2024.
• Clean Energy Fuels Corp. (NASDAQ: CLNE)coreStrategic or Co-development Partner · 7 May 2024MEW and Clean Energy Fuels entered a joint development agreement to build nine RNG production facilities at dairy farms across seven states (Colorado, South Dakota, Georgia, Florida, Iowa, Nebraska, New Mexico). Clean Energy serves as the RNG off-taker and distributes the fuel through its nationwide network of 600+ RNG stations. The agreement covers approximately 35,000 cows and is expected to produce up to 4 million gallons of ultra-clean RNG annually, with completion anticipated in 2026. In September 2025, Clean Energy broke ground on three of these facilities covering six dairies and 24,300 cows, expected to produce ~3 million gallons/year.
• Atmos EnergycoreStrategic or Co-development Partner · 1 January 2024Atmos Energy receives RNG from MEW's Volleman's Family Farm facility via a 3.5-mile underground pipeline, supplying natural gas to the town of Gustine and surrounding areas. The pipeline interconnection is designed to accommodate additional central Texas dairy digester projects as the industry expands.
• Southern California Gas Company (SoCalGas)coreStrategic or Co-development Partner · 1 January 2019SoCalGas partnered with Calgren Dairy Fuels and Maas Energy Works to complete California's first dairy RNG facility in Pixley. SoCalGas receives RNG from Calgren's facility (fed by MEW-developed digesters) into its pipeline system, serving customers across Central and Southern California.

Scale indicators13 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Anaergia: Anaerobic digestion technology provider and project developer for organics-to-energy projects. Comparable in AD technology stack and biogas production; differs by serving municipal solid waste and food waste feedstocks rather than primarily dairy manure.

Direct peers

• Aemetis: Renewable fuels company producing biodiesel, renewable diesel, and biogas/RNG from agricultural waste. Overlaps with MEW on dairy biogas-to-RNG value chain and environmental credit monetization.
• Brightmark Energy: Developer of biogas and RNG projects from agricultural and organic waste. Comparable in project development, RNG production, and environmental commodity monetization, with overlap in dairy and food waste feedstocks.
• Clean Energy Fuels Corp. NASDAQ-listed RNG fuel distributor and joint development partner for MEW. Operates 600+ RNG fueling stations and is MEW's primary off-take partner under a nine-facility joint development agreement across seven states. Directly comparable in dairy RNG offtake and distribution.
• Vanguard Renewables: US farm-based anaerobic digestion developer converting manure and food waste into renewable natural gas. Directly comparable business model targeting dairy farm partnerships and RNG offtake, though historically focused on the Northeast US.
• Calgren Dairy Fuels: California dairy RNG cluster operator partnered with MEW-developed digesters in the Pixley/Tulare region. Comparable dairy-RNG cluster model in California, the same core market where MEW has its highest asset concentration.

Broad incumbents

• bp (bp pulse / biogas investments): Integrated energy major investing in biogas and RNG projects, including dairy-sourced renewable natural gas. Competes with MEW for dairy farm partnerships and RNG offtake agreements at a much larger scale.
• Dominion Energy: Utility-scale energy company investing in renewable natural gas and pipeline-injection projects. Comparable in the RNG utility offtake side (similar to MEW's PG&E/SoCalGas/Atmos relationships) but at utility scale across multiple states.
• Chevron Renewable Energy Group: Major oil major with growing renewable natural gas and renewable diesel businesses. Has invested in dairy biomethane projects and competes for RNG offtake volumes. Broad incumbent with deeper capital and broader portfolio than MEW.

Others

• DVO (Dairy Vision Operations): Supplier of anaerobic digester technology and equipment used by MEW for covered lagoon digesters. Enabling peer providing core digester technology; not a direct competitor but a key upstream partner in MEW's technology stack.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/maasenergy

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

Funding overview

Funding rounds2 records

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Maas Energy Holdings