NEW YORK ( TheStreet --There are seven companies in the IPO pipeline that could top $1 billion. If all seven were to price before the year's end, 2011 would match 2001 for billion dollar offerings. But just because an offering is in the big money category, that doesn't mean it's going to be successful. Granted, more investors have an opportunity to get in but that can be a curse and not a blessing. So far, three of the five members of the billion-dollar club that have gone public in 2011 have underperformed. HCA Holdings ( HCA) is down 38% since its debut, Kinder Morgan ( KMI) is down 15% and Yandex ( YNDX) has dropped 17%. The next club member is going to Frac Tech International, which filed to raise $1.15 billion on Monday. The company had previously planned to seek $690 million but pulled out in May. The two billion-dollar deals that have paid off for investors in 2011 are Nielsen Holdings ( NLSN), up 12% and Arcos Dorados ( ARCO), up 33%. Here's a rundown on the companies currently in the billion-dollar pipeline.