COLUMBUS, MT -- (Marketwire) -- 05/12/09 -- STILLWATER MINING COMPANY (NYSE: SWC) advised today that, as in past years, it anticipates during May 2009 several of the Company's officers will sell a small percentage of their personal shareholdings in the Company to cover tax withholding obligations on restricted stock units vesting this year. The restricted stock units vesting were awarded in late April 2006 based on performance in 2005 and were all subject to a three-year forfeiture period. Additional information in regard to these restricted stock awards is available in the Company's 2009 Proxy Statement.

The sales will be reported publicly on a Form 4 filing for each officer, as required by law. Once filed, copies will be available on the Company's website under "SEC Filings" on the Investor Relations tab.

Stillwater Mining Company is the only U.S. producer of palladium and platinum and is the largest primary producer of platinum group metals outside of South Africa and Russia. The Company's shares are traded on the New York Stock Exchange under the symbol SWC. Information on Stillwater Mining can be found at its Web site: www.stillwatermining.com.