Director Dealing

2 September 2014

Sirius Minerals Plc

Director dealing

The Directors of Sirius Minerals Plc (AIM: SXX, OTCQX: SRUXY) ("Sirius" or "the Company") have been notified that Scrimshaw Nominees Pty Limited as trustee for The Scrimshaw Family Trust, of which Mr RJ Scrimshaw, chairman of the Company is a beneficiary, yesterday purchased 2,100,000 of the Company's 0.25p ordinary shares ("Ordinary Shares") at an average price of 11.75p each.

Following this transaction, Mr Scrimshaw has an indirect beneficial interest of 39,419,218 shares representing 2.1% of the Company's issued share capital. Mr Scrimshaw also has an indirect beneficial interest in 833,333 warrants issued by Sirius in connection with the equity placement which took place in March 2014.

As at the date of this announcement, the Company's issued share capital consists of 1,892,733,141. This figure may be used by shareholders in the Company as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change of interest in, the share capital of the Company under the Financial Conduct Authority's Disclosure and Transparency Rules.

For further information, please contact:

About Sirius Minerals Plc

Sirius Minerals is a potash development company with properties in the United Kingdom (North Yorkshire) and the United States (North Dakota). Its primary focus is the development of the York Potash Project which has the world's largest and highest grade deposit of polyhalite, a multi-nutrient form of potash containing potassium, sulphur, magnesium and calcium. Incorporated in 2003, Sirius Minerals' shares are traded on the London Stock Exchange's AIM market. Its shares are also traded in the United States on the OTCQX through a sponsored ADR facility. Further information on the Company can be found at www.siriusminerals.com.