Activist RPD Fund Management, on June 2, unveiled plans to shake up Groupon Inc (NASDAQ:GRPN), saying it has built its stake to just under ten percent and will initiate talks with the company. RPD, based in New York and run by Ahmet Okumus, has owned shares, which it said are worth about $56 million, but on Wednesday, the firm changed its previous 13G, passive holding filing in favor of the 13D activist filing. Q1 2022 hedge fund letters, conferences and more Groupon and subsidiaries operate a marketplace connecting consumers to merchants. It operates in two segments, North America and Interna…