 SAN FRANCISCO, May 26, 2021 PRNewswire -- Castlight Health, Inc. NYSE: CSLT, a leader in healthcare navigation, today announced that senior management will participate in the William Blair 41st Annual Growth Stock Conference, including one-on-one meetings and a presentation on Thursday, June 3, 2021 at 3:00 pm ET. The webcast and related presentation materials will be available on the Investor Relations section of 