“Shares of the instant-messaging platform gained as much as 21% on Monday morning when Business Insider’s Paayal Zaveri exclusively reported that IBM would deploy the messaging tool to all 350,000 of its employees around the world…” https://markets.businessinsider.com/news/stocks/slack-stock-price-ibm-biggest-account-global-employees-messaging-platform-2020-2-1028890304