Syntroleum Announces Planned 1-for-10 Reverse Split

Syntroleum Corporation ("Syntroleum" or the "Company")

announced today that its Board of Directors has approved a 1-for-10 reverse split of its common stock. As previously disclosed in the Form 8-K filed June 28, 2012, the Company's stockholders voted to grant discretion to the Board of Directors to effect a reverse stock split of the Company's common stock at any ratio between 1-for-2 and 1-for-10, with the final decision to be determined by the Company's Board of Directors in its discretion.