Kassets had a distribution-in-specie of Igbreit to the shareholders of Kassets on the basis of 524 units in Igbreit for every 100 shares in Kassets held on 5 October 2012.
To arrive at the share reference price of Kassets on the ex-date (3 Oct 2012):
Kassets's share closing price immediate before ex-date - 5.24 (Igbreit's unit closing price before Kassets' ex-date for the distribution)
= 9.51 - 5.24 (1.38) = RM2.27/ share (rounded down)
More examples of calculation of theoretical ex-price for various corporate exercises here.