Mirus Capital Advisors Advises Security Engineered Machinery on sale to May River Capital

Transaction reflects Mirus’ deep experience guiding New England’s most established manufacturers through pivotal ownership transitions

BURLINGTON, MASS., September 10, 2026 – Mirus Capital Advisors, one of New England’s largest independent middle-market investment banks, has advised Security Engineered Machinery (“SEM”), a manufacturer of high-security data destruction equipment for the protection of sensitive information in government and commercial markets, on its sale to May River Capital, a Chicago-based private equity firm focused on high-quality industrial growth businesses. Mirus Capital Advisors was the exclusive financial advisor to SEM on this transaction. The Mirus deal team was led by Greg Fanikos and Alan Fullerton (both Partners at Mirus) and Bryce Bell (Director).

Over its 50-year history, SEM has built a reputation for exceptional quality and performance that meets or exceeds specifications established by national defense and intelligence agencies for end-of-life media. The company offers a broad range of solutions, including technologically advanced IT products for destroying both hard disk drives (HDDs) and solid-state devices (SSDs), high-security paper shredders, and high-volume disintegrators. SEM proudly manufactures its products in the United States at two Massachusetts facilities located in Westborough and Hudson.

SEM’s solutions are utilized extensively by the Department of Defense, the FBI, various national intelligence agencies and other government departments that create and handle classified and sensitive materials. More recently, the Company has leveraged its expertise in secure data destruction to offer solutions for data center “hyperscalers” that need to destroy large volumes of end-of-life drives in a secure manner that ensures the complete destruction of sensitive customer data.
“From start to finish we had a great experience working with Mirus,” noted Andrew Kelleher, President & Chief Executive Officer of SEM. “The Mirus team worked closely with professionals at SEM to explain our unique value proposition to the market and create a competitive process. In the end I believe we found the best possible partner in May River to accelerate SEM’s expansion into new commercial markets.”

“SEM has built an extraordinary reputation over five decades as the trusted choice for the most demanding data destruction requirements in government and commercial markets,” said Greg Fanikos, Partner with Mirus. “Its engineering expertise, long-standing customer relationships and exceptional financial performance made this a highly sought-after opportunity, and May River Capital’s track record with industrial growth businesses made them an ideal partner to help SEM expand its reach into new markets and applications. We were pleased to help the SEM team achieve an outcome that positions the company for its next chapter of growth.”

Alan Fullerton, Chairman & CEO of Mirus added, “Mirus has a long history of advising New England’s manufacturers, and SEM is exactly the kind of company we are proud to represent. Built over decades on engineering excellence, the company has earned the trust of the most demanding customers in the world. This transaction speaks to the strength of our team’s deep sector expertise and our commitment to guiding exceptional companies through significant milestones. We congratulate SEM and May River Capital on this partnership.”