Harris Williams & Co., a preeminent middle market investment bank focused on the advisory needs of clients worldwide, announces that Universal Air Filter (UAF), a portfolio company of Thompson Street Capital Partners (Thompson Street), has been acquired by strategic buyer Filtration Group. Harris Williams & Co. acted as the exclusive advisor to UAF. The transaction closed on February 29, 2012 and was led from the firm’s Minneapolis office. UAF is the leading designer and manufacturer of engineered air filtration products used to protect electronic equipment enclosures in the communications, computer networking, medical, power generation and industrial machinery end markets. The company provides products engineered to address the challenges of heat dissipation, dust contamination, airflow control, fire retardation, electromagnetic interference (EMI), radio frequency interference (RFI), and size limitations in crowded electronic enclosures. Thompson Street is a private equity firm that invests in service, manufacturing and distribution businesses. The firm partners with management in recapitalizations, management buyouts, corporate divestitures, family businesses in transition and take-private transactions. Thompson Street is located in St. Louis, MO and was founded in 2000. Filtration Group is a developer, designer and manufacturer of air, liquid and fluid filtration solutions serving industry leaders across the world. With $400 million in filtration revenues globally, Filtration Group and its affiliates have been at the forefront of filtration design and technology since 1942. Chicago-based Filtration Group is passionate about cleaning air, reducing carbon emissions, increasing energy efficiency and keeping food & water safe. Filtration Group is an affiliate of Chicago-based Madison Capital Partners. Harris Williams & Co. ( www.harriswilliams.com), a member of The PNC Financial Services Group, Inc. (NYSE:PNC), is a preeminent middle market investment bank focused on the advisory needs of clients worldwide. The firm has deep industry knowledge, global transaction expertise, and an unwavering commitment to excellence. Harris Williams & Co. provides sell-side and acquisition advisory, restructuring advisory, board advisory, private placements and capital markets advisory services. Investment banking services are provided by Harris Williams LLC, a registered broker-dealer and member of FINRA and SIPC, and Harris Williams & Co. Ltd, which is authorised and regulated by the Financial Services Authority. Harris Williams & Co. is a trade name under which Harris Williams LLC and Harris Williams & Co. Ltd conduct business in the U.S. and Europe, respectively.