Complex sentence: Quotient Diagnostics based in Walton-on-Thames in Surrey was the first, it was acquired by EKF Diagnostics in October 2010 for £3.41 million.
Split into simpler sentences: Quotient Diagnostics based in Walton-on-Thames in Surrey was the first of these. It was acquired by EKF Diagnostics in October 2010 for £3.41 million.