Something odd maybe ? Last week someone was buying RRL at 16...

Something odd maybe ?
Last week someone was buying RRL at 16 shares at a time for around $20.00 at a time. This continued to happen throughout
the trading day, there were many transaction noticed.
Then today someone possibly the same person buying RRL at 17 shares at a time once again at around the $20.00 mark. Up until
lunchtime I punted more than 40 such transactions.
Question. Why would someone be doing this ? Is it someone flying under the radar for some reason ? Most transactions seem to
be at the last buy price or 0.005 below. Would appreciate any ideas as to what is taking place here. Many thanks. H.