In a previous post, we discussed the top patent owners in PTAB inter partes and covered business method review proceedings. We now turn our attention to the petitioners, to see which companies have been filing the most petitions for inter partes and covered business method review. In order to get a more recent snapshot of the state of the PTAB, we considered only petitions filed during the USPTO’s Fiscal Year 2014 (i.e., October 1, 2013 to the present). Again, we come across some surprising results. A table of the results is below.