NSAV Holding Inc (NSAV)

[shotsky]

If you are looking at L2, you can't tell that. All you see is tranches. Some are whole trades, others are the quantities in MM spreads.
An MM posts a bid, an ask, and a quantity. They can only trade the quantity in the spread in one given tranch. They can repeat that trade over and over, but they must be at most the quantity posted, or change their spread.
For instance, if you sell 1M shares, and the MM's that look at your trade are otherwise within the spread, but their quantity is 100K, they will have multiple tranches to complete your order.
There are other reasons for tranches, including the mm's ability to acquire enough shares within their spread. If they have to buy from multiple sellers to fill a buy order, you will see those tranches as 'trades' on L2. There is no way to know the actual sizes of buys/sells.