Key TakeawaysCisco Systems said it completed its $28 billion or $157 per share takeover of cybersecurity firm Splunk.The closing came just days after European antitrust officials gave their approval of the deal.Cisco said the addition of Splunk will help expand its reach in the growing market for artificial intelligence products. Just days after obtaining European regulatory approval, Cisco Systems (CSCO) said it closed its $28 billion acquisition of cybersecurity provider Splunk. The software maker said th ...