SHAREHOLDER ALERT: Goldberg Law PC Announces an Investigation of Interpublic Group of Companies Inc. and Advises Investors with Losses to Contact the Firm Goldberg Law PC announces that it is investigating Interpublic Group of Companies Inc. concerning possible violations of federal securities laws. If you purchased or otherwise acquired Interpublic shares and would like more information regarding the investigation, we encourage you to click here , or contact Michael Goldberg or Brian Schall , of Goldberg Law PC, 1999 Avenueof the Stars Suite 1100, Los Angeles, 90067, at 800-977-7401, to discuss your rights without cost to you.