SAN FRANCISCO (MarketWatch) — Shares of Splunk Inc. more than doubled Thursday in an initial public offering that carried high expectations for the business-intelligence software company.

Cisco is buying the cybersecurity firm Splunk in a $28 billion deal as it bolsters its defenses against potential security threats that may be heightened by the widening use of artificial ...

By Michael J. de la Merced Cisco agreed on Thursday to buy Splunk, a data-analysis software company, for $28 billion in cash, as technology giants continue to look to acquisitions as a way to grow ...