Shares in subsidiary undertakings
At 1 July 2016425,443
At 30 June 2017459,733
At 30 June 201612,244
Charge for the period
At 30 June 201712,244
Net book value
At 30 June 2017447,489
At 30 June 2016413,199

A list of subsidiary undertakings is given in note (xii). During the year, the Company invested in Dechra Investments Limited and Dechra Finance Ireland DAC, both wholly owned subsidiaries.