Paramount Mechanical (Stonebridge) Acquires Math Mechanical

Stonebridge Partners Recapitalizes Paramount Mechanical Corp.

March 11, 2021

HVAC & Mechanical

Stonebridge Partners completed a recapitalization of Paramount Mechanical Corp., partnering with founder Mark Cronin and management while receiving subordinated debt and equity from Midwest Mezzanine Funds, Caltius Structured Capital, 747 Capital and other investors. Debt financing for the transaction was provided by Truist Bank and Midwest; the capital raise is intended to support Paramount's continued organic growth and strategic acquisitions across the Mid-Atlantic and Southeast U.S.

Paramount Mechanical Acquires Comfort Solutions of Tidewater

May 1, 2025

HVAC & Mechanical

Paramount Mechanical Corporation, a Stonebridge Partners portfolio company, acquired Comfort Solutions of Tidewater, LLC on May 1, 2025. The add-on expands Paramount’s HVAC installation, maintenance and repair capabilities in the Newport News–Norfolk–Virginia Beach region and furthers its strategy to build a leading Eastern U.S. HVAC services platform focused on mission‑critical end markets.

PremiStar Acquires SI Mechanical

June 12, 2024

HVAC & Mechanical

PremiStar, a commercial and industrial HVAC, plumbing, and building automation platform, has acquired SI Mechanical, LLC, a full-service HVAC and plumbing contractor based in Creedmoor (Austin), Texas. The deal expands PremiStar's footprint in central Texas and brings SI Mechanical's local leadership and customer base (education, healthcare, commercial/industrial, and datacenters) into the PremiStar platform.

PremiStar Acquires Air Temp Mechanical (CT)

January 21, 2025

HVAC & Mechanical

PremiStar has partnered with Air Temp Mechanical, Connecticut’s largest independent commercial HVAC contractor, adding the 188-employee company to its national platform and expanding PremiStar’s footprint to 16 states. Air Temp Mechanical (founded 2001, led by Jeff Leone) provides HVAC installation, maintenance, building controls, plumbing and sheet metal fabrication to education, commercial/industrial, healthcare and government customers.

Seacoast Service Partners (White Wolf) Acquires Putnam Mechanical

December 11, 2023

HVAC & Mechanical

Seacoast Service Partners, a White Wolf Capital Group–backed platform for plumbing and HVAC businesses, has acquired Putnam Mechanical Services, LLC, a commercial HVAC and refrigeration services provider in Southwest Florida. The deal is the platform's second add-on acquisition and expands Seacoast's footprint in Florida and the broader Southeastern U.S.

AMPAM Parks Mechanical Acquires Multi Mechanical, Inc.

November 28, 2023

HVAC & Mechanical

AMPAM Parks Mechanical, a Gemspring Capital portfolio company, has acquired Multi Mechanical, Inc., an HVAC services provider focused on the multifamily market in Southern California. The deal expands AMPAM’s service offering by adding HVAC installation and servicing capabilities to its existing design‑build plumbing platform; founding members of Multi Mechanical will continue to lead the HVAC business under AMPAM.