https://www.reuters.com/article/us-slack-tech-m-a-salesforce-com/salesforce-slack-asked-to-provide-additional-information-by-dojs-antitrust-unit-idUSKBN2AH029 >Salesforce.com Inc and Slack Technologies Inc have received requests for additional information from the antitrust division of the U.S. Department of Justice related to their $27.7 billion merger, regulatory filings showed on Tuesday.