About Priner
From the merger of industry-leading companies to continuous innovation, we deliver quality and safety in industrial engineering and infrastructure for the most demanding sectors in the market.
For over 40 years, Priner has stood out in the industrial engineering and infrastructure sectors, offering safe, efficient solutions with technical excellence.
Originally established as a division of Mills Engenharia in 1982, we quickly evolved, acquiring renowned companies in their respective fields and officially becoming Priner in 2016.
In 2020, we conducted our IPO and became a publicly traded company listed on the B3’s Novo Mercado segment.
Headquartered in Rio de Janeiro with national and international operations, we serve sectors such as petrochemicals, steel, oil, mining, and maritime. Today, our four business units offer:
Our Journey
1982
Mills Engenharia creates the Industrial Services Division, specializing in scaffold assembly.
1992
First onshore Industrial Painting project.
2002
First Industrial Insulation projects, marking the start of multi-service contracts.
2009
Introduction of the Pressurized Habitat technology in Brazil, brought in partnership with the Scottish company SafeHouse.
2013
Mills spins off its Industrial Services Division and Leblon Equities founds Priner Serviços Industriais S.A.
2014
Launch of the Web Deck system.
2016
Mills|SI becomes Priner, operating through two divisions: Priner Industrial Services and Priner Rental.
2017
Priner completes the first phase of its M&A strategy, acquiring 51% of R&R Isolafácil, a leader in removable insulation systems.
Also acquires 75% of Smartcoat Engenharia de Revestimentos
2019
Priner issues its 1st Series of Non-Convertible, Secured Debentures.
2020
Priner’s IPO takes place (PRNR3).
New acquisition of Smartcoat and R&R Isolafácil and entry into the Inspection segment through the acquisition of Poliend.
2021
Establishment of the Infrastructure business unit and the first Priner Day – Vision 2026.
2022
New acquisitions in the segment: Brito&Kerche Inspeções and GMaia Construtora.
2023
Acquisitions of Soegeo, Tresca Engenharia e Integridade, Labteste Análises e Ensaios Metálicos, and Semar Inspeções.
2024
New public offering of shares to support continued growth strategy.
Acquisitions of Welding and Real Estruturas.
2025
Priner shares (PRNR3) become part of the B3 Small Cap Index.
Priner USA: Establishment of a branch in Miami.
2nd Series of Non-Convertible, Secured Debentures issued by Priner.
Priner completes the acquisition of 60% of SEMEP’s share capital.
Build, Preserve, Develop, and Protect are more than just words — they are
actions that guide everything we do.
This is #OurDNA
Purpose
Build and preserve industrial assetsby developing people and protecting lives and the environment.
Vision
Expand our market through an innovative portfolio, enabling Priner to become a choice of value and reliability to our stakeholders.
Values
We do what is right.
We stay close.
We deliver with excellence.