2019 Notice of Annual General Meeting

14 May 2019

Sirius Minerals Plc

Publication of 2019 Notice of Annual General Meeting

In accordance with Listing Rule 9.6.1R, Sirius Minerals Plc (the "Company") announces that the following documents have been posted to shareholders and submitted to the UK Listing Authority via the National Storage Mechanism:

·      Notice of 2019 Annual General Meeting; and

·      Proxy Form for the 2019 Annual General Meeting.

The Notice of 2019 Annual General Meeting is available on our website at www.siriusminerals.com and will shortly be available for inspection at www.morningstar.co.uk/uk/nsm. The 2019 Annual General Meeting will be held at 1.00 p.m. on Thursday 13 June 2019 at The Events Centre, The Principal York, Station Road, York, YO24 1AA.

For further information, please contact:

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.