From what I've seen, cinn usually shows up on the bid first and not on the ask until it has made a buy, after which it immediately shows up on the ask. It also disappears from the ask when it hasn't gotten a buy in a while.
This is just speculation on my part, but it looks to me like its merely an aggressive flipper dumping shares as soon as it buys them.
News 
Market Data 
Discover 
AI
