Supplement to Talvivaara Mining Company Plc's Prospectus Dated 12 March 2013


Stock Exchange Release
Talvivaara Mining Company Plc
9 April 2013


NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR INTO
THE  UNITED STATES, CANADA, AUSTRALIA,  HONG KONG, SOUTH AFRICA  OR JAPAN OR ANY
OTHER JURISDICTION IN WHICH THE DISTRIBUTION OR RELEASE WOULD BE UNLAWFUL.

THIS  ANNOUNCEMENT IS AN ADVERTISEMENT AND NOT A PROSPECTUS AND INVESTORS SHOULD
NOT  SUBSCRIBE FOR  OR PURCHASE  ANY SHARES  OR SECURITIES  REFERRED TO  IN THIS
ANNOUNCEMENT  EXCEPT ON  THE BASIS  OF INFORMATION  IN THE APPLICABLE PROSPECTUS
(AND  ANY SUPPLEMENTARY PROSPECTUS)  PUBLISHED BY TALVIVAARA  IN CONNECTION WITH
THE  OFFERING. COPIES OF THE PROSPECTUS  (AND ANY SUPPLEMENTARY PROSPECTUS) ARE,
OR WILL BE, AVAILABLE FROM TALVIVAARA'S REGISTERED OFFICE.

  Supplement to Talvivaara Mining Company Plc's Prospectus Dated 12 March 2013

Talvivaara  Mining Company  Plc has  supplemented its  prospectus dated 12 March
2013. The  Finnish Financial Supervisory Authority  has on 9 April 2013 approved
the supplement to the prospectus which is attached hereto in full.

Final  dates  for  the  settlement  of  the  offering,  if  changed  from  those
preliminarily  indicated in the  prospectus, will be  confirmed on or before 12
April 2013.

Enquiries

Talvivaara Mining Company Plc Tel +358 20 7129 800

Pekka Perä, Chief Executive Officer

Saila Miettinen-Lähde, Deputy CEO and CFO


Talvivaara Mining Company Plc

Talvivaara Mining Company is an internationally significant base metals producer
with  its  primary  focus  on  nickel  and  zinc  using  a  technology  known as
bioheapleaching  to extract metals out  of ore. Bioheapleaching makes extraction
of  metals  from  low  grade  ore  economically  viable. The Talvivaara deposits
comprise  one of the largest known sulphide  nickel resources in Europe. The ore
body  is  estimated  to  support  anticipated  production  for  several decades.
Talvivaara has secured a 10-year off-take agreement for 100 per cent of its main
output  of nickel and cobalt to Norilsk Nickel and entered into a long-term zinc
streaming  agreement with Nyrstar  NV. Talvivaara is  listed on the London Stock
Exchange  Main Market and NASDAQ OMX  Helsinki. Further information can be found
at www.talvivaara.com.

DISCLAIMER

This  announcement is an advertisement and not a prospectus and investors should
not  subscribe for  or purchase  any shares  or securities  referred to  in this
announcement  except on  the basis  of information  in the applicable prospectus
(and  any supplementary prospectus)  published by Talvivaara  in connection with
the  Offering. Copies of the prospectus  (and any supplementary prospectus) are,
or  will  be,  available  from  Talvivaara's  registered office. Nothing in this
announcement should be interpreted as a term or condition of the Offering.

The  information  contained  herein  is  not  for  publication  or distribution,
directly  or indirectly, in  or into the  United States, Canada, Australia, Hong
Kong,  South Africa or Japan. These written materials do not constitute an offer
of  securities for sale in the United  States, nor may the securities be offered
or  sold  in  the  United  States  absent  registration  or  an  exemption  from
registration as provided in the U.S. Securities Act of 1933, as amended, and the
rules  and regulations thereunder. There is no intention to register any portion
of  the  offering  in  the  United  States  or  to  conduct a public offering of
securities in the United States.

The  issue,  exercise  or  sale  of  securities  in  the offering are subject to
specific  legal  or  regulatory  restrictions  in certain jurisdictions. None of
Talvivaara  J.P. Morgan Securities  plc, Nordea Bank  Finland Plc, Merrill Lynch
International,  BNP  PARIBAS  and  Danske  Bank  A/S  Helsinki Branch assume any
responsibility  in  the  event  there  is  a  violation  by  any  person of such
restrictions.

The  information contained herein shall  not constitute an offer  to sell or the
solicitation  of an offer to buy, nor shall  there be any sale of the securities
referred to herein in any jurisdiction in which such offer, solicitation or sale
would  be  unlawful  prior  to  registration,  exemption  from  registration  or
qualification under the securities laws of any such jurisdiction. Investors must
neither  accept  any  offer  for,  nor  acquire,  any  securities  to which this
announcement refers, unless they do so on the basis of the information contained
in the applicable Prospectus published or distributed by Talvivaara.

Talvivaara  has not  authorised any  offer to  the public  of securities  in any
Member  State of the  European Economic Area  other than Finland  and the United
Kingdom.  With respect to each Member State  of the European Economic Area other
than  Finland and  the United  Kingdom and  which has implemented the Prospectus
Directive  (each, a "Relevant  Member State"), no  action has been undertaken or
will  be  undertaken  to  make  an  offer  to the public of securities requiring
publication  of a  prospectus in  any Relevant  Member State.  As a  result, the
securities may only be offered in Relevant Member States (a) to any legal entity
which  is a qualified investor as defined in the Prospectus Directive; or (b) in
any other circumstances falling within Article 3(2) of the Prospectus Directive.
For  the purposes of this  paragraph, the expression an  "offer of securities to
the  public" means the communication in any  form and by any means of sufficient
information  on the terms of the offer and the securities to be offered so as to
enable  an investor to decide to exercise, purchase or subscribe the securities,
as  the same may be varied in that  Member State by any measure implementing the
Prospectus  Directive  in  that  Member  State  and  the  expression "Prospectus
Directive"  means  Directive  2003/71/EC (and  amendments thereto, including the
2010 PD  Amending Directive,  to the  extent implemented  in the Relevant Member
State),  and includes any  relevant implementing measure  in the Relevant Member
State   and   the  expression  "2010  PD  Amending  Directive"  means  Directive
2010/73/EU.

This communication includes forward-looking statements within the meaning of the
securities  laws  of  certain  applicable  jurisdictions.  These forward-looking
statements include, but are not limited to, all statements other than statements
of   historical  facts  contained  in  this  communication,  including,  without
limitation,  those regarding Talvivaara's strategy, plans, objectives, goals and
targets.  By their nature, forward looking  statements involve known and unknown
risks,  uncertainties and other factors because they relate to events and depend
on  circumstances that may or  may not occur in  the future. Talvivaara cautions
you that forward-looking statements are not guarantees of future performance and
are  based on  numerous assumptions  and that  its actual results of operations,
including its financial condition and liquidity, may differ materially from (and
be  significantly  more  negative  than)  those  made  in,  or suggested by, the
forward-looking  statements contained in this communication. In particular, this
communication includes forward-looking statements relating to Talvivaara's plans
to address the recent operational challenges faced by Talvivaara. Such estimates
are  based on  a number  of assumptions  that are,  in turn,  based on currently
available  information and judgments  based on such  information. However, these
assumptions   are  inherently  uncertain  and  subject  to  a  wide  variety  of
significant  operational and regulatory risks and uncertainties that could cause
the  actual  outcome  of  Talvivaara's  actions  to materially differ from those
anticipated.

No  statement in this announcement is intended  as a profit forecast or a profit
estimate  and no  statement in  this announcement  should be interpreted to mean
that  earnings  per  share  for  the  current  or  future  financial years would
necessarily  match or exceed the historical published earnings per share. Prices
and values of, and income from, shares may go down as well as up and an investor
may  not get back the amount invested.  It should be noted that past performance
is  no guide  to future  performance. Persons  needing advice  should consult an
independent financial adviser.

J.P.  Morgan Securities  plc, which  is authorised  and regulated  in the United
Kingdom  by  the  Financial  Services  Authority,  is acting as sole sponsor for
Talvivaara  and no one else in connection  with the Offering and will not regard
any  other person (whether or not a  recipient of this announcement) as a client
in  relation to the  Offering and will  not be responsible  to anyone other than
Talvivaara  for providing the protections afforded  to its clients or for giving
advice  in connection with  the Offering, the  contents of this announcement and
the  accompanying  documents  or  any  other  transaction, arrangement or matter
referred to herein or therein.

Each  of Nordea Bank  Finland Plc, Merrill  Lynch International, BNP PARIBAS and
Danske  Bank A/S Helsinki Branch is acting exclusively for Talvivaara and for no
one  else in connection with  the Offering and will  not regard any other person
(whether or not a recipient of this announcement) as a client in relation to the
Offering  and  will  not  be  responsible  to  anyone  other than Talvivaara for
providing  the protections afforded to their respective clients or for providing
advice  in connection with the Offering or any other transaction, arrangement or
matter referred to herein.

This  announcement  should  not  be  considered  a recommendation by any of J.P.
Morgan Securities plc, Nordea Bank Finland Plc, Merrill Lynch International, BNP
PARIBAS or Danske Bank A/S Helsinki Branch or any of their respective directors,
officers,  employees, advisers or any of their respective affiliates in relation
to any purchase of or subscription for securities.

No  representation or warranty, express or implied,  is given by or on behalf of
any  of  J.P.  Morgan  Securities  plc,  Nordea  Bank Finland Plc, Merrill Lynch
International,  BNP PARIBAS or Danske  Bank A/S Helsinki Branch  or any of their
respective  directors, officers, employees, advisers  or any of their respective
affiliates  or any  other person  as to  the accuracy,  fairness, sufficiency or
completeness of the information or the opinions or the beliefs contained in this
announcement (or any part hereof).

None  of the information  contained in this  announcement has been independently
verified  or approved by any of J.P.  Morgan Securities plc, Nordea Bank Finland
Plc, Merrill Lynch International, BNP PARIBAS or Danske Bank A/S Helsinki Branch
or  any of their  respective directors, officers,  employees, advisers or any of
their respective affiliates. Save in the case of fraud, no liability is accepted
by  any of J.P.  Morgan Securities plc,  Nordea Bank Finland  Plc, Merrill Lynch
International,  BNP PARIBAS or Danske  Bank A/S Helsinki Branch  or any of their
respective  directors, officers, employees, advisers  or any of their respective
affiliates  for any  errors, omissions  or inaccuracies  in such  information or
opinions or for any loss, cost or damage suffered or incurred howsoever arising,
directly  or indirectly, from  any use of  this announcement or  its contents or
otherwise in connection with this announcement.

No  person  has  been  authorised  to  give  any  information  or  to  make  any
representations other than those contained in this announcement and, if given or
made,  such information or representations must not  be relied on as having been
authorised by Talvivaara, any of J.P. Morgan Securities plc, Nordea Bank Finland
Plc, Merrill Lynch International, BNP PARIBAS or Danske Bank A/S Helsinki Branch
or  any other person. Subject to applicable  rules and regulations, the issue of
this  announcement shall not, in any  circumstances, create any implication that
there  has been no change  in the affairs of  Talvivaara and its group since the
date  of this announcement  or that the  information in it  is correct as at any
subsequent date.

This  communication is directed only  at (i) persons who  are outside the United
Kingdom  or (ii) persons who have professional experience in matters relating to
investments  falling within Article 19(5) of  the Financial Services and Markets
Act 2000 (Financial Promotion) Order 2005 (the "Order") and (iii) high net worth
entities,  and other  persons to  whom it  may lawfully be communicated, falling
within  Article 49(2) of the Order (all  such persons together being referred to
as  "relevant  persons").  Any  investment  activity to which this communication
relates  will  only  be  available  to  and  will only be engaged with, relevant
persons.  Any person who is not a relevant person should not act or rely on this
announcement or any of its contents.

APPENDIX

Supplement to the prospectus dated 9 April 2013:

This  supplement may not be sent to  any person in Australia, Canada, Hong Kong,
Japan, South Africa or, subject to certain exceptions, the United States, or any
other  jurisdiction in  which it  would not  be permissible. Except as expressly
noted  in  the  prospectus,  no  offering  has  been  made  in  or into any such
countries.

Talvivaara  Mining Company Plc  ("Talvivaara" or the  "Company") supplements the
prospectus  dated  12 March  2013 relating  to  the offering (the "Offering") of
1,633,857,840 new  shares  (the  "Offer  Shares")  or CREST depositary interests
("CDIs")  representing  the  Offer  Shares  (the  "New CDIs") with the following
information.  This information should be read in conjunction with the prospectus
dated 12 March 2013.

On 8 April 2013, Talvivaara published the following stock exchange release:

"Talvivaara  Mining Company Plc ("Talvivaara" or the "Company") announces that a
leakage  has been  detected at  the gypsum  pond of  its Sotkamo  mine on Sunday
evening 7 April 2013. The leakage is located at the pond section adjacent to the
section  where a leakage occurred in November 2012, and is potentially linked to
the previous leakage.

The  Company estimates that approximately 250,000 m(3)  of water has leaked from
the  pond by  now and  that the  remaining water  volume in  the pond section is
approximately  370,000 m(3). The safety capacity  at Talvivaara's Southern water
treatment  unit  is  currently  approximately  1,000,000 m(3) and also the water
treatment  capacity to treat the  water leaking into the  dams is sufficient. No
untreated  water is therefore expected to be  directed outside of the mine area.
The  leakage however consumes safety capacity in advance of the spring melt, and
the  Company has therefore increased discharge of purified water to the Southern
direction  to approximately 800 m(3)/h and the discharge rate is estimated to be
further increased to approximately 1,500 m(3)/h later in the week.

As the risk level of the leaking pond section has been known to be elevated, the
Company  has during  the current  year focused  on maximising safety capacity in
dams  through improving dam structures, increasing water neutralisation capacity
and  discharging treated  waters. Under  normal circumstances  the water  in the
gypsum  pond would have been treated at  the metals recovery plant, but will now
be neutralised at the Southern water treatment unit instead.

Pumping  arrangements at Talvivaara's metals  recovery plant are currently being
altered  such that water purification capacity at the plant can be maximised and
as  much as  possible of  treated water  can also  be discharged to the Northern
direction."

In  addition, on 9 April 2013, Talvivaara published the following stock exchange
release:

"Talvivaara  Mining Company Plc  ("Talvivaara" or the  "Company") announces that
the  gypsum pond leakage detected on 7 April 2013 at its Sotkamo mine has, based
on  current knowledge, been successfully stemmed.  The leakage point in the pond
was  detected in the afternoon of  8 April 2013, after which the Company started
to  fill  the  leakage  point  with  moraine.  On the basis of current knowledge
Talvivaara  estimates that the  water volume leaked  to the safety  dams is less
than  400,000 m(3). The total water volume of the pond section where the leakage
occurred  is estimated  at approximately  620,000 m(3). The  safety capacity and
treatment  capacity at the water treatment units are sufficient for treating the
water  that  has  leaked  and  may  still  leak  from the gypsum pond section in
question.  No untreated  water is  expected to  be directed  outside of the mine
area.

Sufficient safety capacities in the Southern safety dams are highly important in
view risk management. This is especially important in anticipation of the spring
melt,  which is expected to accelerate  late this week. Talvivaara has therefore
increased  the discharge of purified excess water  to the Vuoksi waterway in the
South  to a level of 800 m(3)/h and the flow rate will be further increased to a
level of 1,500 m(3)/h to ensure sufficient safety capacity.

The  levels of  harmful substances  in discharged  waters are  clearly below the
limit  values  set  in  Talvivaara's  environmental  permit.  Water  quality has
remained consistent and quality monitoring is carried out continuously."

The above mentioned information supplements the section "Operating and Financial
Review and Prospects-Recent Developments" in the prospectus.

Investors' Right to Cancel Their Subscriptions

Pursuant  to the  terms and  conditions of  the Offering,  in the event that the
prospectus  is supplemented or amended due to an error, omission or material new
information  which could be  of material importance  to investors, investors who
have  subscribed for the Offer  Shares or New CDIs  are entitled to cancel their
subscriptions  in accordance with the  Finnish Securities Markets Act (746/2012)
within  a minimum of two business days from the publication of the supplement in
the  relevant  jurisdiction,  which  shall  be  9 April  2013 in  Finland and is
expected to take place on 10 April 2013 in the United Kingdom. A cancellation of
a  subscription may only  be made in  respect of all  of the Offer Shares or New
CDIs the shareholder has subscribed for. The cancellation right may only be used
if the investor has committed to subscribe or subscribed for the Offer Shares or
New  CDIs  prior  to  the  publication  of  the  supplement or amendment to this
prospectus  and provided  that the  error, omission  or material new information
that  has resulted  in the  supplement or  amendment has  come in light prior to
delivery  of the security to the investor and,  for the Offer Shares or New CDIs
subscribed  for pursuant to the subscription  rights, the time when trading with
the interim shares representing the Offer Shares begins.

If  an investor wants to use its  right to cancel its subscription, the investor
must  inform  the  subscription  place  where  the  subscription was made of the
cancellation  of the subscription by 8:00 p.m.  (Finnish time) on 11 April 2013
with  respect to the Offer Shares and  by 8 p.m. (UK time) on 12 April 2013 with
respect  to the  New CDIs,  however, taking  into account  the customary opening
hours of such subscription place. The funds will be refunded without interest.

[HUG#1691797]

Attachments

Supplement to Talvivaara Mining Co Prospectus Dated 12.3.2013.pdf