swisspartners Marcuard Heritage AG acquired an additional unknown minority stake in Montauk Holdings Limited (JSE:MNK) on June 4, 2019. Post completion, swisspartners Marcuard Heritage AG owns 10.1% stake in Montauk Holdings Limited. swisspartners Marcuard Heritage AG completed the acquisition of an additional unknown minority stake in Montauk Holdings Limited (JSE:MNK) on June 4, 2019.