Norma Butterfield rings ceremonial bell during Slack Technologies Inc. direct listing at New York Stock...
REFILE - CORRECTING INFORMATION AND SLUG Norma Butterfield, mother of Slack Technologies CEO Stewart Butterfield, rings a ceremonial bell along with New York Stock Exchange (NYSE) President Stacey Cunningham during the Slack direct listing in New York, U.S. June 20, 2019. REUTERS/Brendan McDermid
