Confirmation of total warrants exercised

4 November 2015

Sirius Minerals Plc

Confirmation of total warrants exercised

The Directors of Sirius Minerals Plc (AIM: SXX, OTCQX: SRUXY) ("Sirius" or "the Company") hereby provide a final update in respect of the warrants previously issued to investors on 14 March 2014, in connection with the placing by the Company on 6 March 2014 ("Warrants") and as indicated in the announcement of 2 November 2015.

Following the completion of all Warrant exercises, lodged prior to the Warrant lapsing date, a final total of 129,377,517 Warrants have been exercised pursuant to which the Company has issued 129,377,517 ordinary shares under the block listing application announced on 28 May 2015 ("Warrant Shares").

These Warrant Shares rank pari passu with the Company's existing ordinary shares and represent approximately 72% of the 179,351,029 Warrants originally issued. The issue of the Warrant Shares at 18p per share has raised approximately £23.3m, which will be used for general working capital purposes.

The remaining 49,973,512 Warrants have now expired in accordance with the terms of the warrant instrument meaning no further Warrant Shares will be issued with respect to these expired Warrants.

The Company's enlarged issued share capital now comprises 2,294,744,698 ordinary shares with voting rights. This figure of 2,294,744,698 ordinary shares may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the Company under the FCA's Disclosure and Transparency Rules.

Background information in the form of previous announcements relating to the warrants can be found on the Company website: www.siriusminerals.com.

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About Sirius Minerals Plc

Sirius Minerals is the fertilizer development company focused on the development of the York Potash Project in the United Kingdom, 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.