Health data research company that grew in Connecticut shrinks business, cuts staff and moves a lab to Maryland

Sema4, a health data research company that was drawn to Connecticut from New York City in 2018 with a state loan and expanded to keep up with growt...

August 17, 2022
8:28 PM

Sema4, a health data research company that was drawn to Connecticut from New York City in 2018 with a state loan and expanded to keep up with growth in medical technology, is shrinking its business and laying off workers. It became a political issue Wednesday when Bob Stefanowski, the Republican candidate for governor, said Gov. Ned Lamont is not doing enough to keep business in Connecticut. Sema4 Holdings Corp. said Monday it's exiting the somatic tumor testing business and will close its clinical laboratory in Branford by the end of the year.

Stephen Singer