Branford Castle charges ahead with sale of Vitrek

On August 27, 2026, Branford Castle Partner's Fund I completed the sale of Vitrek LLC to Industrial Physics, the global packaging, material, and coating test and measurement group backed by KKR-affiliated investment funds. Vitrek, based in Lockport, IL, is a leader in electronic test and measurement including for electrical safety testing and electronic jet engine balancing systems for military and commercial applications. Vitrek was the third investment in Branford's Fund I and now represents its fifth exit. During Branford's ownership, Vitrek expanded its product lines, integrated three add-on acquisitions, and professionalized its sales and marketing efforts.

"We've enjoyed our partnership with the entire Vitrek team, led by Don Millstein and Todd Stukenberg. They have built one of the premier companies in electrical safety and precision test and measurement, broadening into new end markets along the way. We wish Vitrek continued success with its new owner," said David Castle, Managing Partner of Branford Castle Partners.

"It has been a privilege to work alongside Don, Todd and the entire Vitrek team. Vitrek is a stronger, more diversified business today, and we're excited to see that continue under Industrial Physics," added Marilyn Yang, Managing Director of Branford Castle Partners.

The transaction was supported by the investment banking team at Stifel, led by Bharat Ramprasad and Michael Hart, the legal team at Akerman LLP, headed by Jed Freeland, and the accounting/finance team at RSM, headed by Michael Giuliano. At the time of the sale, Vitrek's lenders/financing partners were Pelham S2K and Farragut Capital Partners.

Vitrek's CEO, Don Millstein, added, "We had a great run with the team at Branford. We leave this partnership a larger, more capable organisation."

Todd Stukenberg, President of Vitrek, added, "We're proud of what we built together with Branford and are now excited for Vitrek's next chapter with Industrial Physics."