Strategic merger and acquisition (M&A) activity in the cybersecurity segment increased in Q1 2019 with 147 transactions completed totaling $5.3B in overall deal value, according to Momentum's Cybersecurity Market Review Q1 2019.The quarter saw mixed year-over-year results: Value (42 M&A transactions totaling $3.3 billion) slid 28 percent from the same period last year but volume (105 financing transactions for $2 billion) amounted to a 32 percent bump from the year prior. More deals involving managed security service providers (MSSPs) were done during Q1 2019 than any other segment Momentum tracked.Rubrik: $261 million Cloudflare: $150 million 360 Enterprise Security Group: $131.2 million Onelogin: $100 million Contrast Security: $65 million Illumio: $65 million Shift Technology: $60 million Cato: $55 million KnowBe4: $50 million eSentire: $47.6 million Carbonite acquired Webroot: $618.5 million Palo Alto Networks acquired Demisto: $560 million Perforce bought Rogue Wave: $480 million NTT Security bought WhiteHat: $315 million GBG acquired IDology: $300 million Zix bought AppRiver: $275 million Symantec bought Luminate: $170 million Orange bought Secure Data: $157 million Akamai bought Janrain: $125 million ACL bought R-sam: $100 million Here are additional high points from Momentum’s report:Q1 2019 continued the upward trend line from the prior quarter with public security stocks rising 19 percent. There were no Cybersecurity IPO’s in Q1 2019. Crowdstrike, Palantir, Tufin, and Ping Identity are expected to go public in 2019. The most active sectors in Q1 2019 were MSSP (5), application security (4), network & infrastructure security (4), and security consulting (4). Related: Example MSSP Mergers and Acquisitions List. Total financing activity is on par with Q1 2018 but volume has doubled. More than 75 percent of Q1 2019 financing volume was from later stage financing (Series B & above). The most active sectors in Q1 2019 were: Risk & compliance (14), network & infrastructure security (13), and identity & access management (9).