The Software Equity Group (SEG) regularly publishes quantitative research on the software and SaaS market M&A activity. It is always great information and clearly shows the trends in the industry. SEG offers its research for free. SEG publishes every month and for every quarter. The SEG SaaS Index contains dozens of publicly traded SaaS companies. The SaaS-only market has dramatically different performance than the overall market that also includes on-premise software.
