thermo fisher scientific inc tmo shares fell more than 5 premarket on wednesday after the medical device and lab equipment maker trimmed its fullyear earnings and revenue guidance “the macroeconomic environment became more challenging in the second quarter” ceo marc casper said in a statement as economic activity in china slowed and businesses across the economy became more cautious in their spending the company said wednesday that it now expects 2023 adjusted earnings per share in the range of 2228 to 2272 versus prior guidance of 2370 and revenue of 434 billion to 44 billion compared with previous guidance of 453 billion thermo fisher reported second quarter net income of 136 billion or 351 per share down from 167 billion or 422 per share in the yearearlier period adjusted earnings per share came to 515 in the second quarter down from 551 in the yearearlier period and below the factset consensus of 543 the company reported secondquarter revenues of 1069 billion versus 1097 billion a year earlier and below the factset consensus of 1099 billion