TA Associates, a global growth private equity firm, completed the acquisition of Auction Technology Group, an online platform for auctions, and Proxibid, an online marketplace for connecting buyers and sellers, from ECI Partners and Primus Capital. Financial terms were not disclosed. “TA Associates is excited to bring together these two profitable and growing online businesses. With their similar business models, technology, and culture, as well as complementary geography and sector focus, we believe that Proxibid and ATG are an excellent match. In collaboration with ECI, we will aim to expand the businesses through both organic and acquisitive growth, and accelerated international expansion,” Morgan Seigler, TA Associates Managing Director.