Biggest IPO of the year: Plains GP prices at $22 By: CNBC.com News October 15, 2013 at 20:22 PM EDT Plains GP Holdings priced its IPO at $22 a share. Despite pricing on the low end of the expected range, it's the largest US IPO of 2013. Read More >> Related Stocks: Bank of America Barclays Plc ADR Citigroup ConocoPhillips Goldman Sachs Group Kinder Morgan Targa Resources Wells Fargo Zoetis