BILLINGS, MONTANA and VANCOUVER, BRITISH COLUMBIA — (Marketwire) — 10/04/11 — STILLWATER MINING COMPANY (NYSE: SWC)(TSX: SWC.U) ("Stillwater") and PEREGRINE METALS LTD. (TSX: PGM) ("Peregrine") today announced the completion of the acquisition of Peregrine by Stillwater.Stillwater has acquired all outstanding shares of Peregrine pursuant to a plan of arrangement under the Canada Business Corporations Act. The transaction was previously approved by the Peregrine sharehold