Rich you write:

"cross trade of 1.553 mil from anon to anon. nothing abnormal about it right!"

http://www.northerntrust.com:12112/pointofview/10_Fall/crossing-trades-to-reduce-costs.html

The above link states:

"Commission costs can be lower in a crossed trade versus an open market trade.

And with some electronic crossing systems that are anonymous, crossing can reduce information leakage, which is often a client concern as they execute larger trades or restructurings."