CHICAGO, IL – October 28, 2025 – Sun Acquisitions, a leading middle-market mergers and acquisitions (M&A) firm, today announced the successful sale of Converting Systems Inc., a Schaumburg, IL-based leader in standard and custom product line machinery, services, and replacement parts, to a Private Investor.
Converting Systems Inc. (CSI) has demonstrated growth over the past several years. The company specializes in manufacturing new machinery, offering machine rebuilding services, and providing CSI-Parts replacement. CSI is committed to delivering solutions that keep customers’ production floors operational.
The acquisition significantly expands the market reach and service capabilities of Converting Systems Inc. within the Chicagoland area.
William Engelhardt, the seller of Converting Systems Inc., praised the M&A firm’s guidance throughout the process. “Kevin Collins and Sun Acquisitions were there for us throughout the entire sale process. Starting with the valuation process, due diligence phase, and being there for us all the way to the finish line. There were a few difficult moments, but he did a great job of getting it done. Thank You Kevin.”
Kevin Collins, Senior Advisor at Sun Acquisitions, served as the lead advisor on the transaction. “Converting Systems Inc. is an outstanding business built around quality services and will have a strong future with their Private Investor,” Collins stated. “It was a pleasure working with William and the Converting Systems Team in completing this transaction.”
About Sun Acquisitions
Sun Acquisitions is a premier mergers and acquisitions firm dedicated to assisting clients with confidential sales, acquisitions, and valuations of privately held companies. With a proven track record of over 500 successful transactions across diverse industries, Sun Acquisitions offers comprehensive guidance throughout the buying or selling process, led by its seasoned professionals.





