ian ▁activ ists ▁Category : N iger ian ▁human ▁rights ▁activ ists ▁Category : Pe ople ▁from ▁Im o ▁State <0x0A> </s> ▁Swiss ▁Le aks ▁( or ▁Swiss Le aks ) ▁is ▁the ▁name ▁of ▁a ▁journal istic ▁investigation , ▁released ▁in ▁February ▁ 2 0 1 5 , ▁of ▁a ▁giant ▁tax ▁ev asion ▁scheme ▁alleg edly ▁operated ▁with ▁the ▁knowledge ▁and ▁encourag ement ▁of ▁the ▁British ▁mult in ational ▁bank ▁H SB C ▁via ▁its ▁Swiss ▁subs idi ary , ▁H SB C ▁Private ▁Bank ▁( S uis se ). ▁Tr igger ed ▁by ▁le aked ▁information ▁from ▁French ▁computer ▁anal yst ▁Her vé ▁Fal ci ani ▁on ▁accounts ▁held ▁by ▁over ▁ 1 0 0 , 0 0 0 ▁clients ▁and ▁ 2 0 , 0 0 0 ▁off sh ore ▁companies ▁with ▁H SB C ▁in ▁Gene va , ▁the ▁dis closed ▁information ▁has ▁been ▁called ▁" the ▁biggest ▁leak ▁in ▁Swiss ▁bank ing ▁history ". ▁ ▁Investig ation ▁ ▁Investig ators ▁al lege ▁that ▁ 1 8 0 . 6 ▁billion ▁eu ros ▁passed ▁through ▁H SB C ▁accounts ▁held ▁in ▁Gene va ▁by ▁over ▁ 1 0 0 , 0 0 0 ▁clients ▁and ▁ 2 0 , 0 0 0 ▁off sh ore ▁companies ▁between ▁November ▁ 2 0 0 6 ▁and ▁March ▁ 2 0 0 7 . ▁The ▁data ▁for ▁this ▁period ▁comes ▁from ▁files ▁removed ▁from ▁H SB C ▁Private ▁Bank ▁by ▁a ▁former ▁st af fer , ▁software ▁engineer ▁Her vé ▁Fal