"Form 13G is used when the filer owns between 5% and 20% of the company and plans to hold it only as a passive investor. If the filler intend to exert control and if the stake’s size exceeds 20%, then a 13D must be filed. Therefore, activist investors and practices such as: hostile takeovers, company breakups, and other “change of control” events, are not permitted by 13G filers." Found this entire "quote" here, just doing some 'basic DD'. :-) www.octafinance.com/blair-william-coil-just-decreased-vantiv-incs-stake/