In order of size of company, i suspect a more realistic list would be: BitFury is 1st, KnCMiner 2nd, Bitmain 3rd, Cointerra 4th, etc.. this size rating probably works regardless of whether you measure by petahash or revenue. I doubt asicminer is even relevant at this time. They're no longer Huge. They were HUGE when the network was less than 1 Petahash - now they're a minnow - and got left behind when the others designed better chips.
Are you forgetting that asicminer had 60PH worth of wafers to sell as of ~2 months ago? That's probably more than bitfury has ever produced.
Anyways it's pointless to speculate because nobody knows the exact (or even approximate) size of every company.
Maybe use age instead of size?
Tried that, companies can sit semi dormant and build reputation for free, again circumventing the system.