Thoma Bravo, a software-focused private equity investment firm, completed the acquisition of a majority stake in MailGun Technologies, a provider of email infrastructure software, from Turn/River Capital. Financial terms were not disclosed. "Mailgun's partnership with Thoma Bravo gives us the capital and operational expertise needed to continue growing our company, expanding our product suite, and building upon a truly comprehensive developer-focused offering. Thoma Bravo has a proven track record of helping software companies achieve exceptional results, and we look forward to leveraging their investment experience,"Will Conway, Mailgun CEO.