Sentinel Capital Partners, a private equity firm that invests in promising mid-market companies, has sold NSI Industries, a manufacturer and supplier of branded electrical products, to Hubbell Incorporated for $3.0bn
Sentinel acquired NSI in November 2024.
NSI is a category-leading provider of more than 15,000 branded replenishment electrical power components serving industrial, infrastructure, and commercial end markets. Its core offering of electrical fittings, connectors, components, and wire management products is sold under the iconic brands Bridgeport, Polaris, and Tork via a network of more than 2,000 third-party distributors and contractors throughout North America.
NSI has delivered impressive and consistent sales growth, driven by steady, replacement-driven demand and an expanding presence in high-growth end markets, including digital infrastructure and electrification applications like power utilities and data centers.
In October 2025, Sentinel sold NSI’s market-leading HVAC division, which included the Duro Dyne and Supco brands, to Lennox International for $550m. This divestiture refocused NSI as a pure-play manufacturer of branded electrical products.
Sentinel’s deep expertise in electrical manufacturing and distribution includes ECM Industries (electrical products for construction, maintenance, lighting, irrigation, landscape supply, and gas utility markets) and Power Products (diversified electrical products).
Sentinel’s broader expertise in industrial manufacturing and distribution includes investments in Chromalox (commercial and industrial electric heating products and systems), Engineered Controls (specialized pressure regulators, valves, and other controls), LTI Boyd (engineered sealing and thermal management components), RotoMetrics (rotary tooling products), Sonny’s (conveyorized car wash systems and related products), and Spectrum Safety Solutions (fire detection and suppression products).
Lincoln International and Baird are serving as financial advisors to Sentinel, and Kirkland & Ellis is providing legal counsel.
