Calumet Specialty Products Partners, L.P. (NASDAQ:CLMT) announced that it priced an underwritten public offering of 11,000,000 common units at $18.00 per unit. Calumet also granted the underwriters a 30-day option to purchase up to 1,650,000 additional common units. This offering is expected to close on September 14, 2011, subject to customary closing conditions. Calumet intends to use the net proceeds from this common units offering, including a proportionate capital contribution from its general partner, to fund a portion of the purchase price and related expenses of Calumet's previously announced acquisition of the Superior, Wisconsin refinery and associated operating assets and inventories and related businesses from Murphy Oil Corporation (the "Superior Acquisition"). The Superior Acquisition was expected to close by the end of the third quarter, assuming all conditions to closing the Superior Acquisition have been satisfied.

Calumet Specialty Products Partners, L.P. produces and sells specialty hydrocarbon products in North America. It operates in two segments, Specialty Products and Fuel Products.

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