Outokumpu - Announcement regarding change in holdings

Outokumpu Corporation
Stock exchange release
July 4, 2025 at 2.00 pm EEST

Outokumpu - Announcement regarding change in holdings

Outokumpu Corporation (business identity code: 0215254-2) has on July 3, 2025,
received a notification based on Chapter 9, Section 5 of the Finnish Securities
Market Act. Solidium Oy's total holding in the shares and voting rights of
Outokumpu has fallen below 15% threshold and was 14.97% on July 3, 2025.

Total direct and
indirect holdings
of Solidium Oy
according to the
notification:
                  % of        % of shares and     Total   Total
                  shares and  voting rights       of      number of
                  voting      through financial   both    shares
                  rights      instruments (total  in %    and voting
                  (total      of B)               (A +    rights of
                  of A)                           B)      issuer

Resulting         14.97%                          14.97%  473,016,832
situation on the
date on
which threshold
was crossed or
reached
Position of       18.93%                          18.93%
previous
notification
(if applicable)

Notified
details of the
resulting
situation on
the date on
which the
threshold was
crossed or
reached:
A: Shares and
voting rights
Class/type of  Number of                     % of
shares         shares and                    shares
               voting                        and
               rights                        voting
                                             rights

               Direct             Indirect   Direct    Indirect
               (SMA 9:5)          (SMA 9:6   (SMA      (SMA 9:6 and
                                  and 9:7)   9:5)      9:7)
FI0009002422   70,793,208                    14.97%
SUBTOTAL A     70,793,208                    14.97%

B: Financial
Instruments
according to
SMA 9:6a
Type of     Expiration  Exercise/Co  Physical    Number  % of shares
financial   date        nversion     or cash     of      and voting
instrument              Period       settlement  shares  rights
                                                 and
                                                 voting
                                                 rights

N/A          N/A         N/A         N/A         N/A     N/A
                                     SUBTOTAL B  N/A     N/A

Outokumpu has a total of 473,016,832 shares. Each share carries one vote.
Outokumpu currently holds 1,808,411 treasury shares.

For more information:

Investors: Ulla Paajanen, SVP, IR and Strategic Advisory, tel. +359 40 763 8767

Media desk, tel. +358 40 351 9840, e-mail media(at)outokumpu.com

Outokumpu Corporation