Our business is energy. The kind that lights up a bulb or the human heart. Our business model is built on relationships. We believe in change, starting with our own. The rest will follow.
Tremagi. Energy. People. Change.

We are the seventh largest operator in the Italian retail electricity market
by number of domestic customers and the leading independent Italian player.

We believe true strength comes from relationships: we drive innovation to stay
close to people, transforming every decision into shared value.

As a Group, we are committed to sharing positive energy with our customers,
fostering growth and change together.

Steps of an evolution

2003

Start of the liberalization process of the electricity market in Italy

2006

The DSE partnership is formed between Duferco Group and Tremagi Group.

2010

The Tremagi Group acquires 100% of DSE.

2011

DSE begins the commercial distribution of natural gas.

2012

DSE Gas Supply is established: logistics, storage, and balancing of natural gas. DSE starts the commercialization of energy-saving devices.

2013

DSE changes its name and becomes Illumia. Illumia Trend is established - a group company operating in wholesale energy markets in Italy and the major European countries.

2014

Illumia embarks on a new chapter and launches a major advertising campaign on the main national media channels.

2016

Illumia undergoes a generational transition as Francesco Bernardi (founder) hands over the company to his three heirs. Wekiwi, the online spin-off of the Tremagi Group, is launched to serve a digital customer base.

2017

Illumia acquires the PMI & Reseller division of ELECTRA ITALIA, a company of the BKW Group.

2018

Wekiwi launches its internationalization strategy with Wekiwi France.

2019

WeCall is established—the in-house call center at Illumia managing all customer retention activities.

2020

The project Energy-up goes live

2021

E-Wide is established—the group’s new ESCo.

2022

Illumia expands its offering with IllumiaWiFi. Illumia wins a lot of Micro Business customers in the STG Auctions.

2023

The Group expands abroad with the launch of Wekiwi Spain.

2024

Plant is established—a company dedicated to renewable energy production. Illumia wins 3 lots of residential customers in the STG Auctions, reaching one million customers served.

2025

Seed is launched—a new project for the Group’s innovation and growth.

ENERGY
THAT MOVES PEOPLE

Our Values
Speed

Giants aren’t defeated by strength, but by speed.
Ever thought about that?

Courage

Dreamers dream.
The brave take action.
Why stop when it gets interesting?

Beauty

Don’t just stand at the door admiring beauty.
Invite it in.

Knowledge

If you want to grow,
you need questions.
Knowledge is fueled with whys.

Trust

See everything in a positive light.
Only you can flip that switch.

Generosity

Do something without expecting
anything in return.
And you’ll get something back.

We believe in people with the drive to always do better.

They’re the ones who lead our group, fueled by a desire to take on new challenges and the ability to create opportunities in a rapidly changing market.

Marco Bernardi

Chairman Tremagi

Francesco Bernardi

Founder and Owner

Matteo Bernardi

CEO Illumia

Tiziano Pacetti

Member of the Board
of directors in Tremagi

Giulia Bernardi

HR Director

Valeria Giacomoni

Executive Vice President

Matteo Carassiti

Partner at Illumia
& CEO E-Wide

Massimiliano Brialdi

Partner at Illumia
& Co-founder E-Wide

Andrea Pagliarani

Chief Financial Officer

Giacomo Tondi

Responsabile Marketing
& Gestione del Portafoglio

Livio Varesi

Sales Training Manager
& Executive, Business Coach

Many different realities, a unique energy.

Illumia is the main company of the Tremagi Group and one of the leading players in the retail electricity and gas market.
It is the first independent Italian operator and ranks seventh among the top operators in the national residential sector by number of customers.

Illumia Swiss is the Group’s company established in 2015, dedicated to managing the San Fiorano Robbia power line and to the development of international business.

It is the Tremagi Group’s response to the challenges of energy efficiency. E-Wide, the Group’s new ESCo, acts to improve energy efficiency, taking on the risk of the initiative.

Joined the Tremagi Group in 2020, EnergyUp is the first energy company dedicated exclusively to providing electricity and gas for the condominium sector. Its goal is to offer Italian condominiums advantageous, transparent, and responsible solutions.

Seed is the Tremagi Group company dedicated to innovation and the development of new projects in the energy sector.
It serves as a research and incubation platform for high value-added initiatives, promoting sustainable growth and business digitalization.

Seed is the Tremagi Group company dedicated to innovation and the development of new projects in the energy sector.
It serves as a research and incubation platform for high value-added initiatives, promoting sustainable growth and business digitalization.

What We Do for the Group.

HR

We value people and their education, because we believe the Group’s growth depends on the growth of each individual.

General Services & Secretariat

We believe in efficiency and in the ability to manage and organize every little detail—so that everything simply works.

HR Administration

We support each employee along their career path, building together a relationship based on trust and transparency.

Legal

We take care of every legal aspect, so that all Group companies can operate in complete safety.

Administration

We aim for a flawless administrative system, able to make the economic and financial management of our companies simple.

Treasury

We work hard to guarantee a lean and dynamic financial system, ensuring optimal management of the company’s funds.

Finance & Control

We efficiently manage the surety system, ensuring the timely renewal of sureties in progress and preparing the necessary documentation for new ones.

 

THE ORGANIZATIONAL MODEL
FOR CRIME PREVENTION

Find out more

 

 

CORPORATE
SOCIAL RESPONSIBILITY

We have the right energy to make a difference.
Our social responsibility is born from the commitment of people who, every day, choose to invest time, skills, and passion in projects that create real value.
It’s our employees who bring the most meaningful initiatives to life, turning collective dedication into a shared mission.

2025 Numbers

330 Employees
Average age 33

58,4 Mln
EBITDA

1.137,5 Mln/€
Revenue

1Mln
Customers

 

The Tremagi Group continues its trajectory of sustainable, innovative, and long-term growth, further consolidating its position as a key player in the Italian energy sector.
Today, the holding company stands as a benchmark in the retail electricity and gas market, serving over one million customers. It continues to invest in technology, people, and local communities, strengthening the core business and opening up new opportunities for growth and value creation.