Both lots of the purchases occurred last week and were completed using on-market trades.
These two director purchase events follow buying from the chairman, managing director and a non-executive director last week.
Last week, Xanadu intersected further copper in the second and third holes at the Zaraa porphyry discovery at its flagship Kharmagtai Copper-Gold Project in Mongolia.
The recent discovery hole at Zaraa intersected 928.4 metres at 0.30% copper and 0.27 g/t gold from 458 metres.
Two new holes have been drilled and the first batch of assays from the drill core is expected to be received in the last week of May.