Stillwater Calls on Clinton Group and Dr. Charles Engles to Publicly Disclose Reasons for Dr. Engles’s Abrupt Resignation in

  Stillwater Calls on Clinton Group and Dr. Charles Engles to Publicly
  Disclose Reasons for Dr. Engles’s Abrupt Resignation in 1997

Business Wire

BILLINGS, Mont. -- April 9, 2013

Stillwater Mining Company (NYSE:SWC) (TSX:SWC.U) (“Stillwater” or the
“Company”) today called on the Clinton Group, Inc. and Dr. Charles Engles,
former Stillwater Chairman and Chief Executive Officer and a current director
nominee of the Clinton Group, to publicly disclose the reasons surrounding his
abrupt resignation from Stillwater in 1997 just two and half years after
appointment to the position.

On February 21, 1997, Stillwater issued a press release announcing Dr.
Engles’s resignation as Chairman and Chief Executive Officer of the Company
without providing any context or explanation and at a time when the Company
was struggling.

Stillwater shareholders deserve an immediate, transparent and forthright
explanation by Dr. Engles and the Clinton Group regarding the abrupt
resignation. The Clinton Group – which only recently acquired 1.3% of
Stillwater’s outstanding shares and has no relevant experience investing in
mining companies – is seeking control of Stillwater by nominating a slate of
director nominees, including Dr. Engles, to the Stillwater Board.

It is critical that Stillwater shareholders are made aware of the details
regarding Dr. Engles’s abrupt resignation given the Clinton Group’s
representation disclosed today that Dr. Engles has been put forward as a CEO
candidate in the event it is successful in its takeover of Stillwater.

“If necessary, former CEO and nominee, Charles Engles, can fulfill the role of
Interim CEO while a permanent CEO is found”

                                         -- Clinton Presentation April 9, 2013

Stillwater today also noted that after it brought to light material
inconsistencies in John DeMichiei’s academic record and highlighted the
significant labor, safety and environmental issues at Signal Peak under his
leadership, Mr. DeMichiei withdrew his name from the Clinton Group slate of
nominees.

Stillwater’s Board of Directors has filed definitive proxy materials with the
Securities and Exchange Commission (SEC) in connection with the Company's 2013
Annual Shareholders Meeting, which will be held on May 2, 2013, and all
shareholders of record as of March 6, 2013 are entitled to vote at the Annual
Meeting. Stillwater encourages all shareholders to carefully review its
definitive proxy filing, investor presentation and other materials and vote
only their WHITE proxy in advance of the proxy voting deadline. For
information about Stillwater’s 2013 Annual Shareholders Meeting, please visit
www.supportstillwater.com.

About Stillwater Mining Company

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 the Russian Federation. The Company’s shares are traded on the New
York Stock Exchange under the symbol SWC and on the Toronto Stock Exchange
under the symbol SWC.U. Information on Stillwater Mining Company can be found
at its website: www.stillwatermining.com.

Some statements contained in this news release are forward-looking statements
within the meaning of Section 27A of the Securities Act of 1933, as amended,
and Section 21E of the Securities Exchange Act of 1934, as amended, and,
therefore, involve uncertainties or risks that could cause actual results to
differ materially. These statements may contain words such as "believes,"
"anticipates," "plans," "expects," "intends," "projects", "estimates,"
"forecast," "guidance," or similar expressions. These statements are not
guarantees of the Company's future performance and are subject to risks,
uncertainties and other important factors that could cause our actual
performance or achievements to differ materially from those expressed or
implied by these forward-looking statements. Such statements include, but are
not limited to, comments regarding expansion plans, costs, grade, production
and recovery rates, permitting, financing needs, the terms of future credit
facilities and capital expenditures, increases in processing capacity, cost
reduction measures, safety, timing for engineering studies, and environmental
permitting and compliance, litigation, labor matters and the palladium and
platinum market. Additional information regarding factors, which could cause
results to differ materially from management's expectations, is found in the
section entitled "Risk Factors" in the Company's 2012 Annual Report on Form
10-K and in subsequent filings with the United States Securities & Exchange
Commission. The Company intends that the forward-looking statements contained
herein be subject to the above-mentioned statutory safe harbors. Investors are
cautioned not to rely on forward-looking statements. The Company disclaims any
obligation to update forward-looking statements.

Contact:

For Stillwater Mining Company
Mike Beckstead, 406-373-8971
or
Innisfree M&A Incorporated
Arthur Crozier / Jennifer Shotwell / Scott Winter
212-750-5833
or
Media:
Sard Verbinnen & Co
Dan Gagnier / Michael Henson
212-687-8080