Notable 2012 IPOs that had strong earnings results last week include Five Below ( FIVE ), Splunk ( SPLK ) and Infoblox (BLOX). Withdrawals highlight week of slow filing activity Five companies withdrew their IPO filings last week, including oil and gas E&P Ute Energy (UTE), Texas-based bank PlainsCapital (PCB) hydraulic fracturing company FTS International (FTSI), Chinese light bulb maker TCP International (TCPI.RC) and biofuel producer Fulcrum Energy (FLCM). While eight companies were able to update their filings this past week, data suggest that half of the US pipeline consists of stale or postponed deals.