Wrong! Buying your own company shares is not price manipulation. It is called share repurchase or stock buyback and something totally usual in stock markets. Here is the definition of price manipulation from wikipedia including several examples. Again, stock buybacks is not on their list.

Oh and you know, NIM is not the company share of Nimiq Foundation. NIM is a currency and there is no relation between the price of NIM and the value of Nimiq Foundation. That is the same as if you claim that BoA does price manipulation when they use some of their USD to buy EUR to pay their employees in their eu branch, who for some reason prefer EUR over USD. Apparently Nimiq employees prefer NIM over USD (at least for 16% of their salary)....