The deal will see current private equity owners Providence Equity Partners and Sterling Investment Partners exit a portion of the shareholding and retain minority stakes in the business.
US-based SSI was founded in 1977 and uses online, mobile and offline tools to carry out market research via more than 31 million surveys a year.
HGGC CEO Rich Lawson will become chairman of the board at SSI, joined by the firm’s managing partner Steve Young.
Providence and Sterling will also continue to be represented on the board.
Lawson said, “We are excited to partner with the management team, Providence, and Sterling on this investment in SSI, which pioneered sampling, data collection and data analytics, and has been an industry innovator and leader since its inception.”
HGGC recently sealed its first exit within the consumer sector, selling Hollander Sleep Products to rival firm Sentinel Capital Partners.
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