Marmon Utility LLC
Marmon Utility LLC, a Berkshire Hathaway subsidiary operating under the Hendrix and Kerite brands, manufactures overhead and underground power cable systems for electric utilities globally, with three U.S. production facilities serving wildfire mitigation, storm hardening, and grid reliability applications.
- Company typePrivate
- Founded2010
- HeadquartersMilford, United States
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Marmon Utility LLC does
Marmon Utility LLC is a U.S.-based manufacturer of overhead and underground power cable systems serving electric utilities globally. Operating under the heritage Hendrix and Kerite brands through three manufacturing facilities in Seymour, CT; Milford, NH; and Amherst, NH, the company addresses the reliability, storm hardening, and wildfire mitigation needs of investor-owned utilities, public power utilities, electric cooperatives, and renewable energy developers. A subsidiary of Marmon Group, which is owned by Berkshire Hathaway, Marmon Utility combines more than 75 years of institutional history with the financial backing of one of the world's largest conglomerates, and ships product to all 50 U.S. states and all seven continents.
The product portfolio spans spacer cable systems, tree wire, covered tap/tie/ground wire, and polymer insulators — including Fire Retardant (UL 94 V-0 certified) and High Temperature (rated to 200°C continuous conductor temperature) variants — for overhead applications; and medium voltage (5kV-35kV) Hendrix TRXLPE and Kerite EPR cables, high voltage (69kV-138kV) cables, and Cable-in-Conduit (CIC) for underground applications. Technical differentiation rests on proprietary high-density polyethylene (HDPE) insulator blends, the Kerite Permashield extruded stress control layer, and the 2024 launch of Hendrix ImpactAlert, a real-time impact detection monitoring system powered by Atomation. The Cable-in-Conduit line carries an unmatched 40-year warranty, and leadership across the firm collectively holds 17 U.S. patents signaling sustained R&D investment in utility-grade cable and molded accessory design.
Revenue is generated through hardware sales of cable systems and components, complemented by turnkey engineering and installation services offered through Kerite Cable Services. Pricing is project-specific under multi-year contracts, with bundled one-price aerial cable system packages available to provide budget certainty for utility customers. Distribution combines a dedicated sales representative network covering all 50 U.S. states and international markets, an inside-sales and quote request workflow, an e-commerce platform (CableProspector.com), and active participation in industry tradeshows, webinars, and a technical content library. Documented customer outcomes include a 67% reduction in sustained outages and a 42% reduction in momentary outages for utilities deploying Hendrix Spacer Cable systems, and the company's covered conductor technology was validated by Southern California Edison as delivering the highest mitigation-to-cost ratio among three fire risk reduction options evaluated in 2019.
Marmon Utility LLC firmographics
Firmographics- Name
- Marmon Utility LLC
- Legal name
- Marmon Utility LLC
- Website
- https://marmonutility.com
- Company type
- Private
- Founded year
- 2010
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Marmon Utility LLC, a Berkshire Hathaway subsidiary operating under the Hendrix and Kerite brands, manufactures overhead and underground power cable systems for electric utilities globally, with three U.S. production facilities serving wildfire mitigation, storm hardening, and grid reliability applications.
- Ownership category
- akta.pro rank
Marmon Utility LLC industry classification
Industry- Product category
- Power Cable Systems for Electric Utilities
- NAICS
- Communication and Energy Wire and Cable Manufacturing (33592), Power and Communication Line and Related Structures Construction (237130)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electrical Industrial Apparatus (3620), Electronic Connectors (3678)
- akta.pro primary industry
- Utility & Underground Distribution Cable (URD/Substation) (IMADAMAG)
- akta.pro secondary industries
- Power Cables & Conductors (LV/MV cables, flexible cables, bus wire, armored cable) (IMAGAEAC), Underground Power Cables (MV/HV/EHV, XLPE, PILC, subsea/land) (EUADADAB), Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards) (IMAGAEAA), Underground transmission & distribution cable EPC (civil + cable install) (EUADAKAB)
Keywords
Where Marmon Utility LLC is headquartered
LocationHeadquarters
- HQ city
- Milford
- HQ country
- United States
- HQ region
- North America
Offices4 records
Markets served
Marmon Utility LLC business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Power Cable and Hardware Product Sales: Marmon Utility generates revenue through the manufacture and sale of overhead and underground power cable systems, including spacer cable, tree wire, covered conductors, insulators, medium voltage cables, high voltage cables, and associated hardware and accessories. Products are sold project-based to utilities, with pricing determined by project quotes, cable specifications, and volume. The company also offers turnkey engineering and installation services through Kerite Cable Services, adding professional services revenue to the product sales model.
- Engineering and Installation Services: Kerite Cable Services offers turnkey engineering and installation packages providing a single-source solution for cable challenges. The Aerial Cable Systems one-price system bundles circuit materials, design/review, and field support/final inspection under a single price. These services are offered alongside product sales as an add-on or standalone offering.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Project-specific product pricing |
| Other | Multi-year contract | Aerial Cable Systems One-Price System |
Go-to-market motion4 records
Distribution channels4 records
Marketing channels6 records
Marmon Utility LLC product offering
Product offeringCore offering
Marmon Utility designs, manufactures, and supplies overhead and underground power cable systems for electric utilities under the Hendrix and Kerite brands, including spacer cable, tree wire, covered conductors, polymer HDPE insulators, medium-voltage (5kV–35kV) and high-voltage (69kV–138kV) underground cables, Cable-in-Conduit, and the ImpactAlert real-time impact-detection monitoring system. Through Kerite Cable Services it also delivers turnkey engineering, design, and installation support as a single-source package.
Product overview
Marmon Utility LLC, operating under the Hendrix and Kerite brands, offers a comprehensive portfolio of overhead and underground power cable solutions for electric utilities. The overhead portfolio includes Spacer Cable Systems, Tree Wire, Covered Tap/Tie/Ground Wire, and Polymer Insulators/Accessories (including Fire Retardant and High Temperature variants). The underground portfolio includes Medium Voltage Cables (TRXLPE and EPR conductors from 5kV-35kV), High Voltage Cables (69kV-138kV), Cable-in-Conduit solutions, and Kerite Cable Services for turnkey installation. A notable add-on module is ImpactAlert, a real-time impact detection monitoring system. All products are backed by Berkshire Hathaway ownership and the company's Rapid Cycle Time program for industry-leading lead times.
Differentiator
Problem solved
Functional benefit
Brands
- Hendrix: Power cable and spacer cable systems brand offering overhead solutions including spacer cable, tree wire, tap/tie/ground wire, and molded products
- Kerite
- ImpactAlert
Products and services
- Hendrix Spacer Cable System Aerial covered cable system comprising messenger wire, covered conductors, and polyethylene spacers engineered for storm hardening, outage prevention, vegetation management, wildlife fault reduction, and right-of-way reduction for electric utility overhead distribution.
- Hendrix Tree Wire Covered open wire supported on polyethylene insulators, designed for reliability and performance in treed environments where vegetation contact is a primary outage cause.
- Covered Tap, Tie, and Ground Wire Tap wire application providing the benefits of a covered cable system to jumper and tap wire connections in overhead electrical distribution.
- Polymer Insulators and Molded Accessories High-density polyethylene (HDPE) insulators and molded accessories including tie-top, vise-top, line post, clamp-top, trunnion, and station post insulators that are stronger, lighter, and more impact-resistant than porcelain.
- Fire Retardant (FR) Insulators Fire retardant HDPE insulators that self-extinguish after heat source removal, tested to UL 94 V-0 (the most stringent rating), designed to reduce wildfire ignition risk in high fire-threat utility corridors.
- High Temperature (HT) Insulators Specialized HDPE blend insulators allowing operation at a maximum continuous conductor temperature of up to 200°C depending on mechanical load, for high-heat overhead systems.
- Medium Voltage Underground Cables (Hendrix TRXLPE and Kerite EPR) Underground power cables including Hendrix TRXLPE Conductor (15kV–35kV) and Kerite EPR Conductor (5kV–35kV) engineered for reliability in demanding medium-voltage underground distribution applications.
- High Voltage Underground Cables High voltage underground power cables rated 69kV to 138kV for transmission-level underground power distribution.
- Cable-in-Conduit (CIC) Pre-installed underground cable solution offering up to 60% lower installation costs than pull-through methods, backed by an unmatched 40-year warranty.
- Kerite Cable Services Turnkey engineering and installation package providing a single-source solution for underground cable challenges, including project management, design/review, and field support/final inspection.
- Hendrix ImpactAlert (Powered by Atomation) Real-time impact detection and monitoring solution for overhead power lines that detects line disturbance events (vehicle collisions, extreme weather, falling debris) and alerts utilities to enable rapid response and reliability analysis.
Quantifiable outcome
- 67% reduction in sustained outages and 42% reduction in momentary outages for utilities using Hendrix Spacer Cable systems
- +4 more outcomes
Companies that use Marmon Utility LLC
Customer profileNamed customers3 records
Segments2 records
Ideal customer profiles2 records
Marmon Utility LLC technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability1 record
Feature11 records
Marmon Utility LLC partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Reliaguard (Reliaguard®)minorHendrix Molded Products announced a partnership with Reliaguard® for wildfire mitigation and grid hardening solutions, combining Hendrix insulators and accessories with Reliaguard products to provide integrated wildfire risk reduction for utilities.
Scale indicators8 records
Recent moves6 records
Expansion highlights7 records
Marmon Utility LLC competitors and assessment
Company assessmentDirect peers
- Prysmian Group: Largest global cable manufacturer offering medium and high voltage underground cables, overhead conductors, and accessories for utilities. Prysmian's 2018 acquisition of General Cable made it the most direct global competitor to Marmon Utility's Kerite underground and Hendrix overhead product portfolios.
- Southwire Company: One of the largest U.S. wire and cable manufacturers with significant utility exposure across medium/high voltage underground and overhead products. Southwire's manufacturing scale and broad distribution overlap directly with Marmon Utility's domestic utility customer base.
- Nexans: Global cable manufacturer with a substantial utility division offering medium and high voltage underground cables, overhead conductors, and accessories. Nexans competes with Marmon Utility on both utility tenders and grid hardening programs across North America and internationally.
- Okonite Company: U.S.-based specialty manufacturer of medium and high voltage underground power cables for utilities. Okonite's product portfolio (5kV–138kV EPR and XLPE cables) directly overlaps with Marmon Utility's Kerite underground cable line and serves similar investor-owned utility and co-op customers.
- Service Wire: U.S. specialty wire and cable manufacturer serving utility, commercial, and industrial markets with overhead and underground power cable products. Service Wire competes with Marmon Utility for distribution utility orders and shares a similar U.S. manufacturing-based value proposition.
Broad incumbents
- Hubbell Incorporated: Diversified electrical products manufacturer with utility solutions including insulators, connectors, and overhead hardware. Hubbell's electrical group competes with Marmon Utility's molded products line (HDPE insulators, polymer accessories) across the same utility specifier and procurement relationships.
- AFL (Fujikura): Subsidiary of Fujikura Ltd. manufacturing fiber optic cable, copper cable, and overhead conductors including covered conductors for utilities. AFL's overhead conductor product lines overlap with Marmon Utility's tree wire and spacer cable offerings, particularly in storm hardening applications.
- Sumitomo Electric: Global manufacturer of power cables, overhead conductors, and utility grid components with significant North American utility sales. Sumitomo's high voltage underground cable and overhead transmission product lines compete with Marmon Utility on larger transmission and distribution tenders.
Regional players
- Quanta Services: Largest U.S. utility infrastructure construction contractor executing T&D and grid hardening projects. While Quanta is a contractor rather than a manufacturer, it is a key downstream buyer of underground and overhead cable products and competes indirectly with Marmon Utility's Kerite Cable Services turnkey installation offering.
Emerging players
- Reliaguard: Niche provider of wildlife mitigation covers, bird diverters, and line protection products for utility distribution and transmission systems. Reliaguard is both a co-development partner with Marmon Utility's Hendrix brand and a complementary product supplier competing for wildfire mitigation budget allocations.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Marmon Utility LLC social profiles
Digital presenceMarmon Utility LLC compliance and trust
Trust signalCompliance1 record
Marmon Utility LLC financial estimates
Financial estimateRevenue estimate
Valuation estimate
Marmon Utility LLC leadership team
Management profileNumber of profiles
Profiles8 records
Marmon Utility LLC funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Marmon Utility LLC M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Marmon Utility LLC
What does Marmon Utility LLC do?
Marmon Utility designs, manufactures, and supplies overhead and underground power cable systems for electric utilities under the Hendrix and Kerite brands, including spacer cable, tree wire, covered conductors, polymer HDPE insulators, medium-voltage (5kV–35kV) and high-voltage (69kV–138kV) underground cables, Cable-in-Conduit, and the ImpactAlert real-time impact-detection monitoring system. Through Kerite Cable Services it also delivers turnkey engineering, design, and installation support as a single-source package.
Is Marmon Utility LLC a public or private company?
Marmon Utility LLC is a private company. It is classified as corporate owned and is currently operating.
When was Marmon Utility LLC founded?
Marmon Utility LLC was founded in 2010. It employs 101 to 250 people.
Where is Marmon Utility LLC based?
Marmon Utility LLC is headquartered in Milford, United States, in the North America region.
How does Marmon Utility LLC make money?
Two revenue lines are on record. Power Cable and Hardware Product Sales are the primary driver. The others are engineering and Installation Services.
Who are Marmon Utility LLC's main competitors?
Direct peers on record are Prysmian Group, Southwire Company, Nexans, Okonite Company and Service Wire. Broad incumbents are Hubbell Incorporated, AFL (Fujikura) and Sumitomo Electric. Quanta Services is listed as a regional player. Reliaguard is listed as an emerging player.
Does Marmon Utility LLC have an API?
No public API is recorded for Marmon Utility LLC.
What industry is Marmon Utility LLC in?
Marmon Utility LLC's product category is Power Cable Systems for Electric Utilities. Its primary akta.pro industry code is IMADAMAG, Utility & Underground Distribution Cable (URD/Substation), with a secondary code of IMAGAEAC, Power Cables & Conductors (LV/MV cables, flexible cables, bus wire, armored cable). Its NAICS code is 33592 and its SIC code is 3600.