Mark Penn
Mark Penn

Mark Penn's Stagwell Group investment firm has acquired, which helps clients remove unwanted information from the Internet to maintain a positive online presence, from

“ReputationDefender is a key player in an important space that has become even more important given concerns over social media and privacy evident today,” said Penn in a statement.

He sees synergies between ReputationDefender and Stagwell's portfolio of PR and marketing firms that includes Finn Partners, SDKKnickerbocker and Wye Communications.

Rich Matta, who will continue to lead ReputationDefender, expects to "double down on the people and technology" required to help it deliver results for clients.

Penn, co-founder of polling firm Penn, Schoen and Berland Assocs, is a former advisor to Bill/Hillary Clinton and Tony Blair, CEO of Burson-Marsteller and Microsoft executive VP/chief strategic officer.

ReputationDefender is Stagwell's 17th investment.