GNI Management Group Acquires Isolation Majeau et frère inc.

GNI Management Group Inc. Acquires Thermal-Tek Insulation

April 1, 2026

Industrial Services

GNI Management Group Inc. (an Ironbridge portfolio company) has acquired Thermal-Tek Insulation, a Saskatoon, Saskatchewan-based insulation services provider serving the surrounding area. Thermal-Tek has provided insulation services in Saskatoon since 2001.

GNI Management Group Acquires McPherson Products

April 1, 2024

HVAC & Mechanical

GNI Management Group Inc., an Ironbridge Equity Partners portfolio company, has acquired McPherson Products, a St. Cloud, Minnesota-based insulation services provider. The acquisition is GNI's first U.S. location and adds a tenth branch to its network; owner Dennis Dufner will remain as branch manager as the business continues to operate as McPherson Products.

SEI Group Acquires G5 Enterprises

December 5, 2023

Building Products

SEI Group LLC, a Quad-C Management-backed installer of insulation and building products, acquired the assets of G5 Enterprises Inc., a Nixa, Missouri-based installer operating nine branches across Missouri and Arkansas. The add-on expands SEI's geographic footprint into the Midwest and South Central U.S.; financial terms were not disclosed.

GNI Management Group Acquires Advanced Insulation Inc.

September 1, 2023

Construction

GNI Management Group Inc., an Ironbridge Equity Partners portfolio company, has acquired Winnipeg-based Advanced Insulation Inc., a provider of insulation services focused on new-home construction and retrofit markets in the Winnipeg region. The deal expands GNI’s geographic footprint into Manitoba; Advanced’s president Evan Lavallee will remain as branch manager to support integration and local growth.

GNI Management Group Acquires Moore Insulation Ltd.

March 9, 2022

Building Products

GNI Management Group Inc., an Ironbridge Equity Partners-backed platform, has acquired St. Catharines-based Moore Insulation Ltd., a regional provider of insulation to the Niagara new‑build market. The deal expands GNI's coverage in Ontario, gives Moore access to GNI's purchasing scale and retrofit operations, and will see Phil Moore continue as branch manager in the Niagara region.

Ironbridge Equity Partners Acquires Controlling Interest in Great Northern Insulation (GNI)

September 1, 2020

Building Products

Ironbridge Equity Partners, together with GNI's management team, has acquired a controlling interest in GNI Management Group Inc. (Great Northern Insulation) from Mill Street & Co., which will retain a minority stake. GNI, headquartered in Woodstock, Ontario, operates eight locations with approximately 300 employees and provides insulation, air sealing, fireproofing, cladding, and building diagnostic services across residential, commercial and industrial markets.