#USA #Chicago #Main Street #MSC Income Fund #UBM ParentCo

Main Street Capital Corporation's Strategic Move

In a significant development, Main Street Capital Corporation (NYSE: MAIN) has revealed that it has successfully completed a follow-on investment in UBM ParentCo, LLC, commonly referred to as United Business Mail (UBM). This latest investment, amounting to $15.6 million, is aimed at bolstering the company's operational capabilities as it seeks to enhance its market presence.

Founded in 1987 and headquartered in Chicago, Illinois, UBM stands at the forefront of the marketing mail industry, specializing in optimizing postage, transportation, and delivery for large-scale mailers. The recent infusion of capital plays a pivotal role in supporting UBM's strategic acquisition of a national leader in asset-light palletized mail consolidation and related services.

The follow-on investment, executed alongside co-investor MSC Income Fund, Inc. (NYSE: MSIF), marks an evolution in UBM's operational strategies. The funding will facilitate UBM's mission by allowing the company to advance its capabilities in areas such as mail optimization services, freight brokerage, and logistics for both B2B and B2C segments. This move signifies Main Street's commitment to investing in promising ventures that pave the way for growth and innovation.

The Strategic Acquisition

UBM's acquisition of Mystic Logistics, completed in December 2025, has already expanded its logistics and transportation capabilities, enhancing its service offerings. With the current follow-on investment, UBM aims to further its logistics network and commingling services to improve speed-to-market and cost efficiency. The strategic initiatives underline UBM's commitment to maximizing the efficiency of marketing mail programs for its clients, ensuring they retain a competitive edge in a rapidly evolving landscape.

About Main Street Capital Corporation

Main Street Capital is known for its principal investment strategies, offering tailored long-term financing solutions primarily to lower middle-market companies. Through its investment ventures, Main Street delivers capital with an objective to support management buyouts, recapitalizations, and a host of growth financing needs in various sectors. It seeks to partner with entrepreneurs and management teams to create customized financial solutions that address the unique needs of its investment strategies.

This latest financial maneuver is indicative of Main Street's ongoing commitment to fostering innovation and growth within its investment portfolio. The company primarily targets firms generating annual revenues between $10 million and $150 million, ensuring they have the necessary capital to thrive and expand in their markets.

MSC Income Fund's Role

MSC Income Fund, Inc. also plays a vital role in these transactions, focusing on debt capital provisions for private entities often at the cusp of private equity acquisitions. By aligning with Main Street, MSC Income Fund seeks to enhance its investment portfolio while creating synergistic opportunities that benefit all parties involved. With their combined financial strength and expertise, both investment firms are well-poised to enhance the operational landscape for UBM and its clients.

Through its strategic investments and acquisitions, Main Street Capital Corporation and MSC Income Fund continue to demonstrate their commitment to transforming the investment landscape in Marketing Mail and related industries while ensuring optimal returns for their stakeholders.