Hi gildage,
"It looks to me like the shares were simply not acquired on the open market like the shares that were sold. Perhaps it was some institution that wanted to dispose of their shares quietly...and management people decided to pick them up for an undisclosed sum."
I know this probably sounds a little cynical, but this smells a little like" I'll scratch your back if you scratch mine."
All things being equal and above board, why not just make the buying price public?
Also, are there tax implications in the U.S. for when they get sold?
Good Luck to all!