• Rick Weil (Managing Director, Co-Head of Packaging) and Melanie Yermack (Managing Director, Co-Head of Packaging) served as transaction leads.
• Mesirow acted as the exclusive financial advisor on this transaction, highlighting the firm’s continued success in the packaging sector.

CHICAGO, January 12, 2026 – Mesirow announced it acted as the exclusive financial advisor to Wertheimer Box on its sale to SupplyOne, Inc., a portfolio company of Revelar Capital.

Wertheimer Box is a Chicago-area corrugated packaging provider known for custom shipping boxes, branded packaging, e-commerce mailers and specialty retail displays. Founded in 1939 and based in McCook, Illinois, Wertheimer Box has grown into one of the largest independent corrugated packaging providers in the region.  The Company combines decades of experience with strong design, printing and manufacturing capabilities to serve an impressive customer base.

Doug Wertheimer, Owner and President of Wertheimer Box, said, “Mesirow’s sector knowledge and deep industry relationships were invaluable in identifying SupplyOne as an ideal partner. Joining SupplyOne enables us to tap into national resources and logistics, while preserving the close-knit culture and dedicated customer service that our clients have come to expect. We’re excited for what this partnership means for our customers and to build on an 85+ year legacy our employees have created in the market.”

“We are proud to have advised Wertheimer Box in its strategic partnership with SupplyOne,” said Rick Weil, Managing Director and Co-Head of Packaging at Mesirow Investment Banking. “Wertheimer Box is a highly respected and innovative Chicagoland packaging organization with a stellar reputation. SupplyOne emerged as an ideal partner that can enhance Wertheimer Box’s deep expertise in custom corrugated production with national scale and diverse packaging portfolio to deliver exceptional value to Wertheimer’s customers.” added Melanie Yermack, Managing Director and Co-Head of Packaging at Mesirow Investment Banking.

The sale of Wertheimer Box represents another successful corrugated transaction completed by Mesirow Investment Banking. Mesirow is one of the most active advisors in the packaging industry, having completed more than 220 transactions in the last 25 years. By leveraging extensive sector-specific expertise across industry groups and nurturing deep, longstanding relationships, Mesirow has amassed a proven track record of highly tailored and successful transactions on behalf of its clients.