Sirius Minerals Regulatory News (SXX)

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible)i

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attachedii:

Sirius Minerals Plc

1b. Please indicate if the issuer is a non-UK issuer (please mark with an "X" if appropriate)

Non-UK issuer

2. Reason for the notification (please mark the appropriate box or boxes with an "X")

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify)iii:

3. Details of person subject to the notification obligationiv

Name

Citigroup Global Markets Limited

City and country of registered office (if applicable)

London , United Kingdom

4. Full name of shareholder(s) (if different from 3.)v

Name

N/A

City and country of registered office (if applicable)

5. Date on which the threshold was crossed or reachedvi:

16/08/2019

6. Date on which issuer notified (DD/MM/YYYY):

20/08/2019

7. Total positions of person(s) subject to the notification obligation

% of voting rights attached to shares (total of 8. A)

% of voting rights through financial instruments(total of 8.B 1 + 8.B 2)

Total of both in % (8.A + 8.B)

Total number of voting rights of issuervii

Resulting situation on the date on which threshold was crossed or reached

0.0895%

4.7888%

4.8783%

7,006,279,248

Position of previous notification (if

applicable)

0.5057%

4.5068%

5.0125%

8. Notified details of the resulting situation on the date on which the threshold was crossed or reachedviii

A: Voting rights attached to shares

Class/type ofshares

ISIN code (if possible)

Number of voting rightsix

% of voting rights

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

GB00B0DG3H29

6,270,328

0.0895%

SUBTOTAL 8. A

6,270,328

0.0895%

B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC (DTR5.3.1.1 (a))

Type of financial instrument

Expirationdatex

Exercise/Conversion Periodxi

Number of voting rights that may be acquired if the instrument is

exercised/converted.

% of voting rights

Right to recall lent securities

14,005,274

0.1999%

SUBTOTAL 8. B 1

14,005,274

0.1999%

B 2: Financial Instruments with similar economic effect according to Art. 13(1)(b) of Directive 2004/109/EC (DTR5.3.1.1 (b))

Type of financial instrument

Expirationdatex

Exercise/Conversion Period xi

Physical or cash

settlementxii

Number of voting rights

% of voting rights

Equity Swap

03/09/2019

Cash

46,603,696

0.6652%

Equity Swap

15/10/2019

Cash

8,851,326

0.1263%

Equity Swap

01/11/2019

Cash

517,869

0.0074%

Equity Swap

19/12/2019

Cash

1,552,298

0.0222%

Equity Swap

04/08/2020

Cash

600,000

0.0086%

Equity Swap

07/08/2020

Cash

7,000,000

0.0999%

Equity Swap

01/02/2021

Cash

17,539,100

0.2503%

Equity Swap

24/02/2023

Cash

12,897,525

0.1841%

Exchangeable Bond

23/05/2027

Physical

185,018,420

2.6408%

Exchangeable Bond

13/05/2027

Physical

40,933,279

0.5842%

SUBTOTAL 8.B.2

321,513,513

4.5889%

9. Information in relation to the person subject to the notification obligation (please mark the

applicable box with an "X")

Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuerxiii

Full chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held starting with the ultimate controlling natural person or legal entityxiv (please add additional rows as necessary)

X

Namexv

% of voting rights if it equals or is higher than the notifiable threshold

% of voting rights through financial instruments if it equals or is higher than the notifiable threshold

Total of both if it equals or is higher than the notifiable threshold

Citigroup Global Markets Limited

Citigroup Global Markets Europe Limited

Citigroup Financial Products Inc.

Citigroup Global Markets Holdings Inc.

Citigroup Inc.

10. In case of proxy voting, please identify:

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional informationxvi

Place of completion

Belfast

Date of completion

20/08/2019