** Shares of genetic testing firm Natera NTRA.O down 4.2% at $160.63, while shares of medical diagnostics company Guardant Health GH.O down 10.5% at $42.40, in afternoon trade
** Guardant Health has sued rival Natera in a California federal court for allegedly stealing trade secrets related to cancer-detection blood tests
** In a lawsuit filed Thursday, Guardant said its scientists poached by Natera transferred thousands of confidential files to the company to develop competing tests
** NTRA denies the allegations, calling them "baseless" and says it will defend itself against the claims
** GH is seeking a court order to block the scientists from sharing its secrets and is also seeking monetary damages
** Attorneys and spokespersons for Guardant did not immediately respond to requests for comment
** GH gained 15.3% and NTRA more than doubled in 2024
(Reporting by Siddhi Mahatole and Kamal Choudhury)
((Siddhiprabhanjan.mahatole@thomsonreuters.com))