T. Rowe Price Associates, Inc. and its affiliates ("T. Rowe Price"), as
described in more detail below, serve as investment adviser to various entities
including institutional clients, sub-advised funds, common trust funds and
proprietary mutual funds ("Advisory Clients").  T. Rowe Price is making the
following disclosure. On 22 February 2023, Advisory Clients of T. Rowe Price
loaned 2,353,089 voting shares with a right of recall. This decreased our net
ownership below 5% to 5,500,256 common shares or 4.40%, representing 5,415,357
voting rights or 4.33% of TGS ASA. Our aggregate ownership remains above the 5%
threshold with a total of 7,853,345 common shares or 6.29%, representing
7,768,446 voting rights or 6.22% of TGS ASA.
 
Explanation of the T. Rowe Price Organization:
 
T. Rowe Price Group, Inc. ("TRPG") owns 100% of T. Rowe Price Associates, Inc.
("TRPA").  TRPG is a holding company with no physical assets and no independent
operations of its own.  TRPG is a publically traded company on NASDAQ under
ticker TROW.  There are no controlling stockholders of this company.  TRPG has
officers and directors, but no independent employees.  All TRPG employees are
employees of operating subsidiaries.  TRPG does not directly hold any shares of
TGS ASA.
 
TRPA is a wholly-owned subsidiary of TRPG. TRPA is registered with the U.S.
Securities and Exchange Commission ("SEC") as an investment advisor under the
Investment Advisers Act of 1940. TRPA does not directly hold any shares of TGS
ASA.