ATP Expedition are going to K2 from June to August. They leave on the 9th of June and the trip ends on the 7th of August. This is the peak time of climbing on K2, when the weather is best for climbing. They should arrive in Islamabad on the 9th of June.
They say that they expect 7-12 climbers to be part of this climbing group. Towards the end of June they will be attempting to scale K2.