Mainzer Stadtwerke
Mainzer Stadtwerke AG is a Mainz-based municipal multi-utility wholly owned by the City of Mainz, delivering electricity, gas, water, district heating, broadband, and bus/tram public transport to roughly 550,000 electricity customers, 272,000 water customers, and 56.8 million annual transit passengers across the region.
- Company typePrivate
- Founded1933
- HeadquartersMainz, Germany
- Headcount1,001–5,000
- GTM typeB2B and B2C
- OfferingServices
What Mainzer Stadtwerke does
Mainzer Stadtwerke AG is the municipal multi-utility of Mainz, Germany, wholly owned by the City of Mainz (Stadt Mainz) and operating as an Aktiengesellschaft under German law. Founded in 1933 by consolidating the city's electricity, gas, water, and transport operations, the group today runs ~50 subsidiaries and roughly 1,900 employees across an integrated portfolio: electricity and gas retail (Mainzer Energie and Überlandwerk Groß-Gerau), electricity/gas/water grid operations (Mainzer Netze, serving ~550,000 electricity customers, 39,800 gas connections, and ~272,000 water customers), district heating (Mainzer Fernwärme, ~30 km network, ~3,500 customers), public transport by bus and tram (Mainzer Mobilität, 56.8 million passengers in 2024), broadband fiber and public WiFi (Mainzer Breitband/M-Hotspot), and a swimming/spa facility (Taubertsberg Bad). Beyond these core utilities, the group holds a one-third stake in PIONEXT GmbH to operate open-space solar parks and operates the Energiepark Mainz green-hydrogen facility in partnership with Linde GmbH, with a modernized Energypark Mainz 2.0 scheduled for 2027.
The underlying technology footprint combines regulated network infrastructure — 24/7 Netzleitstelle (network control center), new substations such as Umspannwerk Mainspitze, riverbank filtration wells at waterworks Eich, ~26,500 street-lighting points, and the Zollhafen/Heiligkreuz-Viertel urban-development projects — with renewable generation assets totaling ~331 installations (191 PV, 79 wind, 12 hydropower and others via subsidiary KMW AG), producing ~594 million kWh of renewable electricity in 2024. The Energiepark Mainz produces green hydrogen via electrolysis powered by wind energy, a pioneering installation dating to 2015. Real-time customer service operates Monday-Thursday 08:00-17:00 and Friday 08:00-15:00 from headquarters at Rheinallee 41, supplemented by a digital portal and integration with the RMV (Rhein-Main-Verkehrsverbund) tariff system including the Germany-wide Deutschland-Ticket.
The revenue model is a hybrid of regulated network fees and competitive retail tariffs: subscription/recurring revenue from electricity, gas, water, district heating, and broadband supply to residential and commercial customers; transaction/fee revenue from public-transport fares (~56.8M passengers in 2024), swimming-pool admissions, and Zollhafen real estate transactions; infrastructure-development fees via the Heiligkreuz-Viertel project (~2,000 apartments for ~6,000 residents). FY2024 produced an annual surplus (Jahresüberschuss) of €17.2 million, generated after absorbing €27.8 million in public-transport loss compensation and €15.1 million in concession fees to the City of Mainz, with an equity ratio of 42.8%. The go-to-market motion is sales-led and direct, leveraging the customer-service center, an in-person energy sales force for commercial/industrial accounts through Mainzer Stadtwerke Energie und Service GmbH, the Mainzer Mobilität transit channels (mobile app, ticket shops, RMV integration), and Mainzer Netze grid-connection services for industrial customers including a recently signed 90 MW data-center connection order.
Mainzer Stadtwerke firmographics
Firmographics- Name
- Mainzer Stadtwerke
- Legal name
- Mainzer Stadtwerke AG
- Website
- https://mainzer-stadtwerke.de
- Company type
- Private
- Founded year
- 1933
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- Mainzer Stadtwerke AG is a Mainz-based municipal multi-utility wholly owned by the City of Mainz, delivering electricity, gas, water, district heating, broadband, and bus/tram public transport to roughly 550,000 electricity customers, 272,000 water customers, and 56.8 million annual transit passengers across the region.
- Ownership category
- akta.pro rank
Mainzer Stadtwerke industry classification
Industry- Product category
- Municipal Utilities
- NAICS
- Utilities (221), Water Supply and Irrigation Systems (221310), Water, Sewage and Other Systems (2213)
- SIC
- Water Supply (4941), Electric, Gas & Sanitary Services (4900)
- akta.pro primary industry
- Water Park Operations & Management Services (Third-Party Operators) (THAAABAI)
- akta.pro secondary industries
- Water, Air Quality & Environmental Hygiene (Legionella/IAQ) (BPABAAAO), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK), HVAC, Water Heaters & Indoor Air Quality Distribution (CRAOAFAJ)
Keywords
Where Mainzer Stadtwerke is headquartered
LocationHeadquarters
- HQ city
- Mainz
- HQ country
- Germany
- HQ region
- Europe
Offices3 records
Markets served
Mainzer Stadtwerke business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Operations, Personnel, Supply Chain, Technology or R&D, Marketing or Sales
Revenue model
- Electricity Supply: Sale of electricity including green/eco electricity products to residential and commercial customers in Mainz and surrounding region. Revenue from grid fees and energy sales.
- Gas Supply: Natural gas supply services to residential and commercial customers.
- Drinking Water Supply: Water production, treatment and distribution through Mainzer Netze GmbH. Supply to approximately 272,000 people from waterworks Hof Schönau, Eich and Petersaue.
- Public Transportation: Bus and tram services through Mainzer Verkehrsgesellschaft mbH (Mainzer Mobilität). Revenue from ticket sales. 56.8 million passengers in 2024. Integrated with RMV tariff system.
- District Heating: Central heating supply through Mainzer Fernwärme GmbH and Mainzer Wärme Plus GmbH (100% subsidiary of MSES). Approximately 3,500 customers on Lerchenberg and Berliner Siedlung.
- Broadband/Fiber: Fiber optic network services through Mainzer Breitband GmbH. Public WLAN hotspots (M-Hotspot).
- Swimming Pool and Wellness: Operation of Taubertsberg Bad sports and family pool plus spa facility through Mainzer Stadtbad GmbH.
- Infrastructure Development: Real estate development and infrastructure projects including Zollhafen and Heiligkreuz-Viertel urban development through Zollhafen Mainz GmbH & Co. KG and direct subsidiary projects.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Residential and commercial energy tariffs |
| Usage-based | Monthly | Germany Ticket for local transport |
| Unit Pricing | Pay-as-you-go | Swimming pool admission fees |
Go-to-market motion1 record
Distribution channels6 records
Marketing channels11 records
Mainzer Stadtwerke product offering
Product offeringCore offering
Mainzer Stadtwerke AG is a municipal multi-utility holding company providing essential public services across the Mainz and Rhein-Main region, including electricity, natural gas, drinking water, district heating, public transportation (buses and trams), broadband/fiber networks, public WiFi, renewable energy, and swimming/wellness facilities. The company operates through more than 50 subsidiaries including Mainzer Netze, Mainzer Energie, Mainzer Mobilität, Mainzer Fernwärme, Mainzer Breitband, and Mainzer Erneuerbare Energien, serving approximately 272,000 water customers, 23,500 energy customers, and 56.8 million public transport passengers annually.
Product overview
Mainzer Stadtwerke AG is a municipal utility company operating as a multi-utility provider and holding company with over 50 subsidiaries. The organization offers a diversified portfolio of services organized around core business segments: energy supply (electricity, gas, heating via Mainzer Energie and subsidiary Wärme Plus), water supply and grid infrastructure (Mainzer Netze), public transportation (Mainzer Mobilität), district heating (Mainzer Fernwärme), broadband/fiber (Mainzer Breitband), and renewable energy development (Mainzer Erneuerbare Energien). Additional operations include swimming facilities (Taubertsberg Bad), urban development projects (Heiligkreuz-Viertel, Zollhafen), hydrogen production (Energiepark Mainz), and sustainability programs. The company provides 24/7 utility services to Mainz and the region under its corporate purpose 'Da.Sein – Vor.Ort' (Being There – On Site), with approximately 1,900 employees serving roughly 272,000 water customers and operating extensive electricity, gas, and district heating networks.
Differentiator
Problem solved
Functional benefit
Brands
- Mainzer Energie: Energy supply brand for electricity, gas, and cooling solutions for private and commercial customers
- Mainzer Mobilität
- Mainzer Netze
- Mainzer Fernwärme
- Mainzer Breitband
- Mainzer Taubertsbergbad
- Mainzer Erneuerbare Energien
- M wie Zukunft
- Energiepark Mainz
- Aus Grau wird Leben
Products and services
- Electricity Supply (Mainzer Energie)
Quantifiable outcome
- Supplied approximately 272,000 people with drinking water
- +5 more outcomes
Companies that use Mainzer Stadtwerke
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles3 records
Mainzer Stadtwerke technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
Feature5 records
Mainzer Stadtwerke partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core, major and minor.
- Linde GmbHcorePartnership with Linde for hydrogen production at Energypark Mainz since 2015. Extended collaboration for 15 more years with Energypark Mainz 2.0 project featuring modern electrolyzers (5 MW total), 300 bar filling station, and industrial hydrogen supply. Linde provides process gas to industrial customers while Mainzer Stadtwerke supplies green electricity for electrolysis.
- PIONEXT GmbHcoreMainzer Erneuerbare Energien GmbH holds one-third stake in PIONEXT GmbH which operates renewable energy installations. First open-space photovoltaic park in Lipporn (Rhein-Lahn-Kreis) with 10.7 MWp capacity. Next solar park in Lonsheim (25 hectares, 56,000+ modules) going online summer 2025.
- CA ImmomajorJoint development of Zollhafen Mainz project on 30-hectare area combining residential, cultural, and commercial spaces with restored industrial monuments, canals, and marina. Project advancing with Grünufers Nord (10,000 sqm park) and continued development.
- Deutsche Telekom GmbHminorService provider for DocuSign digital signature processing with data hosting in three EU data centers (Paris, Amsterdam, Frankfurt).
- Kraftwerke Mainz-Wiesbaden AG (KMW AG)core50% subsidiary of Mainzer Stadtwerke group contributing to total of 331 renewable energy installations. Part of 594 million kWh renewable electricity production in 2024.
- RMV (Rhein-Main-Verkehrsverbund)majorRegional transport association integrating Mainz public transport into unified tariff and ticketing system. Provides Deutschland-Ticket and other ticket options. 56.8 million passengers transported in 2024.
- Mainzer Stiftung für Klimaschutz und EnergieeffizienzcoreFoundation jointly established by Mainzer Stadtwerke AG and City of Mainz supporting climate protection and energy efficiency projects including 'Aus Grau wird Leben' greening program for schoolyards.
Scale indicators16 records
Recent moves7 records
Expansion highlights8 records
Mainzer Stadtwerke competitors and assessment
Company assessmentDirect peers
- N-ERGIE Aktiengesellschaft: Nürnberg's regional municipal energy company supplying electricity, gas, heat, and water across Middle Franconia. Comparable mid-tier municipal energy company with a similar regional franchise model.
- Stadtwerke München (SWM): Munich's municipal multi-utility (M-Stadtwerke) operating electricity, gas, water, district heating, public transit (MVG), and broadband (M-Net). The most direct structural analog to Mainzer Stadtwerke as a vertically integrated municipal Versorger with similar Daseinsvorsorge mandate and multi-utility scope.
- Stadtwerke Düsseldorf AG: Düsseldorf's municipal utility operating electricity, gas, water, heat, and public transit. Direct German Stadtwerke peer with comparable mid-city scale and multi-utility profile.
- Mainova AG: Frankfurt-based municipal multi-utility (electricity, gas, water, heat, energy services), part of the same Rhein-Main regulatory geography. Closest regional peer in terms of customer mix, network operations, and multi-utility footprint overlapping Mainzer Stadtwerke's territory.
- Stadtwerke Köln GmbH: Cologne's municipal multi-utility operating electricity, gas, water, district heating, public transit (KVB), and broadband. Comparable mid-tier German Stadtwerke with a similar multi-utility structure and Rhine-region footprint.
- Leipziger Stadtwerke: Leipzig's municipal multi-utility providing electricity, gas, heat, water, and public transit in eastern Germany. Direct peer as a mid-size German Stadtwerke with similar vertically integrated structure.
- enercity (Stadtwerke Hannover AG): Hannover's municipal multi-utility providing electricity, gas, heat, water, and e-mobility to a comparable mid-size German city. Direct Stadtwerke peer with similar scope and renewable energy strategy.
Broad incumbents
- EnBW Energie Baden-Württemberg AG: One of Germany's four major integrated utilities, providing electricity, gas, water, and network services. Acts as a broad incumbent competitor and counterparty rather than a direct multi-utility peer, but is the relevant scale benchmark for grid, generation, and energy services competition in Germany.
Others
- Thüga Aktiengesellschaft: Munich-based holding/consortium of more than 100 German municipal utilities, providing shared services, procurement, and digital solutions to Stadtwerke. Closely related ecosystem participant — comparable to Mainzer Stadtwerke as a peer network rather than a direct competitor.
Regional players
- EWR AG (Energieversorgung Worms, Rheinhessen): Worms-based regional municipal utility operating in the Rheinhessen region, adjacent to Mainz's territory. Comparable regional Versorger with overlapping franchise geography and similar municipal-ownership structure.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Mainzer Stadtwerke social profiles
Digital presenceMainzer Stadtwerke compliance and trust
Trust signalCompliance3 records
Mainzer Stadtwerke financial estimates
Financial estimateRevenue estimate
Valuation estimate
Mainzer Stadtwerke leadership team
Management profileNumber of profiles
Profiles3 records
Mainzer Stadtwerke subsidiaries and ownership
Company hierarchySubsidiaries13 records
Mainzer Stadtwerke funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Mainzer Stadtwerke 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 Mainzer Stadtwerke
What does Mainzer Stadtwerke do?
Mainzer Stadtwerke AG is a municipal multi-utility holding company providing essential public services across the Mainz and Rhein-Main region, including electricity, natural gas, drinking water, district heating, public transportation (buses and trams), broadband/fiber networks, public WiFi, renewable energy, and swimming/wellness facilities. The company operates through more than 50 subsidiaries including Mainzer Netze, Mainzer Energie, Mainzer Mobilität, Mainzer Fernwärme, Mainzer Breitband, and Mainzer Erneuerbare Energien, serving approximately 272,000 water customers, 23,500 energy customers, and 56.8 million public transport passengers annually.
Is Mainzer Stadtwerke a public or private company?
Mainzer Stadtwerke is a private company. It is classified as state government owned and is currently operating.
When was Mainzer Stadtwerke founded?
Mainzer Stadtwerke was founded in 1933. It employs 1,001 to 5,000 people.
Where is Mainzer Stadtwerke based?
Mainzer Stadtwerke is headquartered in Mainz, Germany, in the Europe region.
How does Mainzer Stadtwerke make money?
Eight revenue lines are on record. Electricity Supply is the primary driver. The others are gas Supply, drinking Water Supply, public Transportation, district Heating, broadband/Fiber, swimming Pool and Wellness and infrastructure Development.
Who are Mainzer Stadtwerke's main competitors?
Direct peers on record are N-ERGIE Aktiengesellschaft, Stadtwerke München (SWM), Stadtwerke Düsseldorf AG, Mainova AG, Stadtwerke Köln GmbH, Leipziger Stadtwerke and enercity (Stadtwerke Hannover AG). EnBW Energie Baden-Württemberg AG is listed as a broad incumbent. Thüga Aktiengesellschaft is listed as an others. EWR AG (Energieversorgung Worms, Rheinhessen) is listed as a regional player.
Does Mainzer Stadtwerke have an API?
No public API is recorded for Mainzer Stadtwerke.
What industry is Mainzer Stadtwerke in?
Mainzer Stadtwerke's product category is Municipal Utilities. Its primary akta.pro industry code is THAAABAI, Water Park Operations & Management Services (Third-Party Operators), with a secondary code of BPABAAAO, Water, Air Quality & Environmental Hygiene (Legionella/IAQ). Its NAICS code is 221 and its SIC code is 4941.