I'm certain Bitmain still make their money from pre-mining undisclosed ASICs, but, this was not accounted for in their IPO documents.

Example; bitmain mining Tensority, without having disclosed any asic able to do so?

https://bitcointalk.org/index.php?topic=5117949.0

On the SHA256 front, Bitmain are currently mining at 1,692,350 TH/s.

That is as of March 5th, down from:
February - 1,790,000 TH/s
January - 1,899,700 TH/s
November - 2,339,210 TH/s

No idea of the make-up S9/S11/S15/S17.

The dropping hashrate suggests alot of their machines are selling.

In January they were running 4,788,300 MH/s of Ethereum ASICs and today are running only 154,520 MH/s, suggesting they are selling hardware through mediums other than their website.

Someone pointed out the B7 to me that is for sale on the Chinese website: https://www.asicminervalue.com/miners/bitmain/antminer-b7-96kh

This must be their new miner I was looking for.