Mr. José Marangoni creates a little workshop of electrical repairs in Mogi-Mirim. Due to the Second World War and due to the difficulty of importing, he started to repair, design and manufacture transformers and turbines for generators.

Marangoni becomes an international reference in quality and safety in the manufacturing of transformers. It starts supplying all energy distributors in Brazil, in addition to exporting to countries in America.

Inauguration of the metalwork business plant in the current Marangoni Park (at the time, unit II), a place that received all the company's production plants.

During this period, Marangoni becomes part of the ABB group.

With high demand of business with Europe, a unit is created in Croatia.

With successful administration, organization, and implementation of the ISO 9001, at the unit in Colombia, Siemens acquires Marangoni Andina.

“Skunk Works”, a core innovation was created for the development and promotion of new technologies.

At 2018, Marangoni signed a contract with Road Steel, a Gonvarri group company, for vehicle containment systems manufacture, sale, and distribution.

The Industry and Trade of Electrical Materials Marangoni LTDA is born, with the manufacture of transformers, lightning rods and electrical high voltage switches.

With the portfolio expanding, Marangoni starts to manufacture radiators, motor fans, valves, and special dry transformers.

Brown Boveri acquires 30% of Marangoni's shares.

Marangoni was invited by Siemens to take over the heavy boilermaking of its unit in the city of Bogotá, Colombia (Metal-Mecânica Vulcano) and created the first international unit, which was renamed Marangoni Andina

Marangoni is once again 100% Brazilian and, with exportation increased to Latin America and the United States.

In 2013 Marangoni forms a joint venture with the German company Meiser, focusing on metal grating, forming Marangoni-Meiser.

During this period, Marangoni achieved, and maintains to this day, several seals and certificates, such as ISO 14001, Achilles, ONIP, Navipeças, D&B, among others.

Marangoni forms a partnership with a Ukrainian startup to manufacture and sell the Mosqitter in Brazil.

Equipment that attracts and kills mosquitoes, without the use of insecticides and generation of waste.