Director/PDMR Shareholding

28 June 2019

Sirius Minerals Plc

Director / PDMR Shareholding

On 28 June 2019, Sirius Minerals Plc ("Sirius" or the "Company") granted awards under its Share Based Incentive Plan (the "Plan") to its Executive Directors, other Persons Discharging Managerial Responsibilities ("PDMR") and other employees.

The awards have been granted as Jointly Owned Equity Awards ("JOE Awards") or as "Options". The JOE Awards consist of the acquisition by the Plan participant of an interest in the growth in value of shares which are owned jointly by the participant and the trustee of the Company's employee benefit trust ("EBT"), along with the right on the part of the participant to acquire the trustee's interest for nil-cost. The Options are rights to acquire shares for nil cost.

The Executive Directors' awards are the "Ordinary Awards", in each case as referred to in the Directors' Remuneration Report on page 75 of the Company's 2018 Annual Report and Accounts, and are subject to the performance conditions set out there.

The vesting of all awards granted to the other Persons Discharging Managerial Responsibilities and other employees is subject to the satisfaction of performance condition milestones linked to the delivery of the Company's North Yorkshire Polyhalite project. The following awards have been granted to other Persons Discharging Managerial Responsibilities.

A total of 11,549,444 new ordinary shares of 0.25 pence each (the "Relevant Shares") have been awarded to the EBT as part of its employee incentive awards. An application has been made for the Relevant Shares to be admitted to the premium listing segment of the Official List of the Financial Conduct Authority (the "FCA") and to trading on the London Stock Exchange plc's main market for listed securities, and dealings are expected to commence at 8.00 am on 1 July 2019. The Relevant Shares will rank pari passu in all respects with all existing ordinary shares in the Company. In accordance with the requirements of the FCA's Disclosure Guidance and Transparency Rules 5.6.1AR and 5.6.2G, the Company confirms that the enlarged share capital of the Company following Admission on 1 July 2019 will be 7,006,279,248 Ordinary Shares in aggregate, each with equal voting rights. No shares are held in treasury.

The above figures may be used by shareholders (and others with notification obligations) as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Sirius Minerals Plc under the FCA's Disclosure Guidance and Transparency Rules.

The Company can confirm that each of the Directors and PDMRs has complied with their respective obligations to notify the Financial Conduct Authority in respect of the above transactions as is their requirement under the EU Market Abuse Regulation.

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About Sirius Minerals Plc

Sirius Minerals Plc is focused on bringing large scale volumes of POLY4 to the global agriculture industry. POLY4 is the Company's trademarked name for its unique multi-nutrient fertilizer to be produced from the world's largest and highest grade polyhalite deposit located in North Yorkshire, United Kingdom, 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.