9 November 2021

System1 Group PLC (AIM: SYS1)

("System1" or "the Company")

Complaint for Trademark Infringement

System1 announces that on 27 September 2021 its US and UK subsidiaries, System1 Research Inc. and System1 Research Limited, filed a complaint for trademark infringement, unfair competition and deceptive trade practices at the United States District Court Southern District of New York against System1 LLC ("the Opposing Party") over their infringing use of the mark "SYSTEM1". The Company is being advised in this matter by Norton Rose Fulbright, an international law firm.

The Opposing Party continues to use the "SYSTEM1" name and mark and has announced that it proposes to expand such use by becoming a NYSE-listed company through a business combination with Trebia Acquisition Corp.

The Company takes the protection of its unique intellectual property very seriously and believes such ongoing and expanding use by the Opposing Party is likely to cause significant confusion with System1 Group PLC and its registered marks and, moreover, constitutes intentional infringement, in violation of relevant US federal and state trademark laws as well as trademark laws in the UK, the EU and other countries.

The Board believes that the Company's case against the Opposing Party is compelling and will issue further updates in due course. A summary of the Company's registered trademarks is attached to this release.

The Company can be found at www.system1group.com.

For further information please contact:

John Kearon, Founder and Executive President

Chris Willford, Chief Financial Officer

Canaccord Genuity Limited                      +44 (0)20 7523 8000

Simon Bridges / Andrew Potts

SUMMARY OF THE COMPANY'S REGISTERED TRADEMARKS CONTAINING "SYSTEM1"

·    EU Registration No. 018400922 for "SYSTEM1"

·    UK Registration No. 00003596520 for "SYSTEM1"

·    U.S. Registration No. 5,362,152 for "SYSTEM1 RESEARCH"

·    U.S. Registration No. 5,488,953 for "SYSTEM1 GROUP"

·    U.S. Registration No. 5,870,379 for "SYSTEM1 MARKETING"

·    U.S. Registration No. 5,870,950 for "SYSTEM1 AD RATINGS"

·    EU Registration No. 01350727 for "SYSTEM1 RESEARCH"

·    EU Registration No. 01371557 for "SYSTEM1 GROUP"

·    EU Registration No. 01402256 for "SYSTEM1 MARKETING"

·    EU Registration No. 017894326 for "SYSTEM1 AD RATINGS"

·    UK Registration No. 00003194309 for "SYSTEM1 RESEARCH"

·    UK Registration No. 00003211076 for "SYSTEM1 GROUP"

·    UK Registration No. 00003261178 for "SYSTEM1 MARKETING"

·    UK Registration No. 00003307814 for "SYSTEM1 AD RATINGS"

·    UK Registration No. 00003081873 for "SYSTEM1 CONCEPT OPTIMIZER"

·    AU Registration No. 1853564 for "SYSTEM1 RESEARCH"

·    AU Registration No. 1371557 for "SYSTEM1 GROUP"

·    AU Registration No. 1402256 for "SYSTEM1 MARKETING"

·    JPN Registration No. 1350727 for "SYSTEM1 RESEARCH"

·    JPN Registration No. 1371557 for "SYSTEM1 GROUP"

·    JPN Registration No. for "SYSTEM1 MARKETING"

·    JPN Registration No. 1441294 for "SYSTEM1 AD RATINGS"

·    NZ Registration No. 1350727 for "SYSTEM1 RESEARCH" "

·    NZ Registration No. 1079198 for "SYSTEM1 GROUP"

·    RU Registration No. 1350727 for "SYSTEM1 RESEARCH"

·    RU Registration No. 1371557for "SYSTEM1 GROUP"

·    SG Registration No. 40201711815Y for "SYSTEM1 RESEARCH"

·    SG Registration No. 40201721156W for "SYSTEM1 GROUP"

·    SG Registration No. 1402256 for "SYSTEM1 MARKETING"

·    SG Registration No. 1441294 for "SYSTEM1 AD RATINGS"

·    CH Registration No. 1350727 for "SYSTEM1 RESEARCH"

·    CH Registration No. 1371557 for "SYSTEM1 GROUP"

·    CH Registration No. 1402256 for "SYSTEM1 MARKETING"

·    CH Registration No. 1441294 for "SYSTEM1 AD RATINGS"