May River Capital, an investment firm with a unique approach to building businesses through partnership and collaboration, completed its acquisition of NSL Analytical Services, a materials testing laboratory firm. Financial terms were not disclosed. "The board and I carefully evaluated the next phase of development for NSL, our employees and our customers. We are pleased to be partnering with a group in May River that is like-minded and aligned with us on both the cultural values and the strategic path necessary to meet our collective goals," Larry Somrack, NSL Analytical Services President.