PHILADELPHIA, September 29, 2011 – FMC Wyoming Corporation announced today that effective November 1, 2011, or as contract terms permit, it will increase both list and off-list soda ash prices by $15.00/short ton for all grades of soda ash. The increase applies to both bulk and packaged products and is in addition to the $20/short ton off-list increase previously announced as effective July 1, 2011.