Announcement of a Change in Shareholding According to Chapter 9, Section 10 of the Finnish Securities Market Act

Sitowise Group Plc Stock Exchange Release 28 May 2026 at 9.30.m. (EEST)

Sitowise Group Plc (the "Company") has on 27 May 2026 received a notification in
accordance with the Chapter 9, Section 10 of the Finnish Securities Market Act
from Bank of America Corporation, according to which Bank of America Corporation
's holding of the shares and votes of the Company increased above 5.00 percent
on 26 May 2026.

According to the notification, Bank of America Corporation holds indirectly a
total of 2,053 shares corresponding to 0.01 percent of the Company's shares and
votes, and a total of 2,977,495 shares through financial instruments
corresponding to 8.30 percent of the Company's shares and votes.

The Company has one series of shares in which each share carries one vote. The
total number of shares and votes is 35,845,665.

Total positions of Bank of America Corporation subject to the notification
obligation

                  % of    % of shares and     Total  Total number of shares
                  shares  voting rights       of     and voting rights of
                  and     through financial   both   issuer
                  voting  instruments (total  in %
                  rights  of B)               (A +
                  (total                      B)
                  of A)
Resulting         0.01    8.30                8.31   35,845,665
situation on the
date on
which threshold
was crossed or
reached
Position of       n/a     n/a                 n/a
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    Number                     % of shares and voting rights
of shares     of
              shares
              and
              voting
              rights
ISIN code     Direct  Indirect           Direct     Indirect
              (SMA    (SMA 9:6 and 9:7)  (SMA 9:5)  (SMA 9:6 and 9:7)
              9:5)
FI4000480215  n/a     2,053              n/a        0.01
SUBTOTAL A              2,053                        0.01

B: Financial instruments according to the Finnish Securities Market Act, Chapter
9, Section 6a

Type of     Expiration  Exercise/   Physical    Number of shares   % of shares
financial   date        Conversion  or          and voting rights  and voting
instrument              period      cash                           rights
                                    settlement
Rights of   n/a         n/a         n/a         2,976,779          8.30
Use
Swaps       30/06/2026  n/a         Cash        716                0.00
                                    SUBTOTAL B  2,977,495          8.30

Information in relation to the person subject to the notification obligation:

Full chain of controlled undertakings through which the shares, voting rights or
financial instruments are effectively held (starting with the ultimate
controlling natural person or legal entity):

Name                % of shares  % of shares and voting rights  Total
                    and voting   through financial instruments  of
                    rights                                      both
Bank of America
Corporation
NB Holdings
Corporation
BofAML Jersey
Holdings Limited
BofAML EMEA
Holdings 2 Limited
Merrill Lynch
International
Bank of America
Corporation
NB Holdings
Corporation
Merrill Lynch
International, LLC
Merrill Lynch
Group Holdings,
L.L.C.
BofA Securities                  8.30                           8.30
Europe SA

Sitowise Group Plc

Additional information:

Sanna Sormaala, CFO, Sitowise Group Plc, tel. +358 50 452 5498

Distribution:

Nasdaq Helsinki
Major media
www.sitowise.com

About Sitowise

Sitowise is a Nordic expert in technical consulting and digital solutions. Our
mission is to engineer the foundation of Nordic resilience. We design
infrastructure, buildings and cities that stand the test of time and change. We
enhance society's operational reliability by developing critical infrastructure
and ensure the sustainable use of the environment and natural resources. We
operate in three business areas - real estate and buildings, infrastructure, and
digital solutions - in Finland and Sweden. The Group's net sales in 2025 were
EUR 189 million, and the company employs approximately 1,900 experts. Sitowise
Group Plc is listed on the Nasdaq Helsinki stock exchange under the trading
symbol SITOWS.