HZM Horizonte Minerals Plc

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESⁱ

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

Horizonte Minerals plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

X

An acquisition or disposal of qualifying financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying
financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to the
notification obligation: ⁱⁱⁱ

Henderson Group plc

4. Full name of shareholder(s)
(if different from 3.):^iv

5. Date of the transaction and date on
which the threshold is crossed or
reached: ^v

08 August 2016

6. Date on which issuer notified:

10 August 2016

7. Threshold(s) that is/are crossed or
reached: ^{vi, vii}

Below 16%

8. Notified details:

A: Voting rights attached to shares ^{viii, ix}

Class/type of
shares

if possible using
the ISIN CODE

Situation previous

to the triggering

transaction

Resulting situation after the triggering transaction

Number
of
Shares

Number
of
Voting
Rights

Number
of shares

Number of voting
rights

% of  voting rights ^x

Direct

Direct ^xi

Indirect ^xii

Direct

Indirect

Ordinary

113,179,719

113,179,719

110,201,006

15.26%

GB00B11DNM70

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Expiration
date ^xiii

Exercise/
Conversion Period ^xiv

Number of voting
rights that may be
acquired if the
instrument is
exercised/ converted.

% of voting
rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments ^{xv, xvi}

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise price

Expiration date ^xvii

Exercise/
Conversion period ^xviii

Number of voting rights
instrument refers to

% of voting rights ^{xix, xx}

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

110,201,006

15.26%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable: ^xxi

See Appendix 1 below.

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease
to hold:

12. Date on which proxy holder will cease to hold
voting rights:

13. Additional information:

This disclosure has been calculated based on total voting rights of  721,934,300

14. Contact name:

Scott Dickenson

15. Contact telephone number:

020 7818 4184

Annex 1: Information in relation to the person subject to the notification obligation (please tick the applicable box):

[ ] 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) issuer.^xiii

[X] Full chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held starting with the ultimate controlling natural person or
legal entity^xiv:

Name^xv

% 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

Henderson Group plc,
Henderson Group
Holdings Asset
Management Limited,
HGI Asset Management
Group Limited,
Henderson Global
Group Limited,
Henderson Holdings
Group Limited, HGI
Group Limited,
Henderson Global
Investors (Holdings)
Limited, AlphaGen
Capital Limited

6.74%

-

6.74%

8.51%

-

8.51%