Block listing application

12 July 2018

Sirius Minerals Plc

Block listing application

Sirius Minerals Plc ("Sirius" or the "Company") provides notification that a block listing application has been made to the London Stock Exchange and Financial Conduct Authority for the admission to trading on its main market for listed securities of 782,574,656 ordinary shares in the Company (the "Block Listing Shares").

The Block Listing Shares relate to the convertible bonds issued by Sirius Minerals Finance Limited during the Company's stage 1 financing.  The convertible bonds, due 2023, which were issued at US$200,000 each and raised US$400 million, were announced on 3 November 2016 (RNS number 2246O).

Block Listing Shares will be issued from time to time pursuant to the conversion of bonds.  The Company will update the total shares on issue on its website on a regular basis and the market will be updated on the total number shares listed under the block listing scheme every 6 months.

The Block Listing Shares will rank pari passu in all respects with all existing ordinary shares in the Company.  It is expected that the block admission will become effective on 13 July 2018.

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About Sirius Minerals Plc

Sirius Minerals Plc is focused on the development of the Woodsmith Mine, which will access the world's largest and highest grade polyhalite deposit located in North Yorkshire, United Kingdom.  Polyhalite is a unique multi-nutrient fertilizer, which can be used to increase balanced fertilization around the world.  Sirius Minerals' shares are traded on the Premium List of the London Stock Exchange.  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.