Complex sentence: In 1868, two employees, James Aikenhead and Alexander Crombie, became partners in the company and renamed it "Ridout, Aikenhead, & Crombie", it became Aikenhead's in 1893, when Aikenhead bought out Ridout and Crombie.
Split into simpler sentences: In 1868, two employees, James Aikenhead and Alexander Crombie, became partners in the company and renamed it "Ridout, Aikenhead, & Crombie". It became Aikenhead's in 1893, when Aikenhead bought out Ridout and Crombie.