Block Listing Application

19 July 2016

Sirius Minerals Plc

Block Listing Application

Sirius Minerals Plc (AIM: SXX, OTCQX: SRUXY) ("Sirius" or the "Company") provides notification that a block listing application has been made to the London Stock Exchange for the admission to trading on AIM of up to 5,975,000 ordinary shares in the Company (the "Block Listing Shares").

The application for the admission of the Block Listing Shares relates to the maximum number of ordinary shares that could be issued as a result of the potential exercise of options granted as part of the financing, which was announced on 12 August 2013 (the "Options").

Block Listing Shares will be issued from time to time pursuant to the exercise of Options, which are exercisable up to 12 August 2016 and at 19.5p per share. The monies raised will be used for general working capital purposes. The Company will update the total shares on issue on its website on a regular basis.

The Block Listing Shares will be issued credited as fully paid and will rank pari passu in all respects with the existing common shares of the Company. It is expected that the block admission will become effective on 25 July 2016.

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About Sirius Minerals Plc

Sirius Minerals is the fertilizer development company focused on the development of its North Yorkshire polyhalite project, the United Kingdom. It 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.