Ann: Change in substantial holding from CBA,CBA-GRB.AX, page-3

The actual number of shares colonial owns had not changed.
Because GRB cancelled some shares as a result of buying shares back
from WOW and cancelling them, the total number of shares on issue has reduced.
This has has the effect of increasing colonials percentage of shares held.

I'm watching GRB and may buy down the track, but not atm.