Main Street Capital and MSC Income Fund Provide Follow-On Financing for Trantech’s Acquisition of Transformer Maintenance and Service (TMS)

April 1, 2026

Main Street Capital Corporation and co-investor MSC Income Fund completed a $26.0 million follow-on investment in their portfolio company, Trantech Radiator Topco, LLC, to support Trantech’s strategic acquisition of Transformer Maintenance and Service, Inc. (TMS). The financing includes $24.7 million of first-lien senior secured term debt and $1.4 million of direct equity, with TMS owners receiving a portion of the acquisition purchase price as equity in Trantech.

Buyers
Main Street Capital Corporation, MSC Income Fund, Inc., Trantech Radiator Topco, LLC
Targets
Transformer Maintenance and Service, Inc. (TMS)
Sellers
Owners of TMS (Transformer Maintenance and Service, Inc.)
Platforms
Trantech Radiator Topco, LLC
Location
South Carolina, United States
Transaction Type
Addon

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