shares of steris plc ste rose 116 to 18746 wednesday on what proved to be an allaround positive trading session for the stock market with the sp 500 index spx rising 142 to 402781 and the dow jones industrial average djia rising 100 to 3271760 steris plc closed 6847 short of its 52week high 25593 which the company achieved on april 20th the stock outperformed some of its competitors wednesday as thermo fisher scientific inc tmo rose 017 to 55515 danaher corp dhr rose 026 to 24748 and