Exhibit 8.1
Our principal subsidiaries as of December 31, 2017, are listed below. All other subsidiaries, if considered in the aggregate, would not constitute a significant subsidiary under Rule1-02(w) of RegulationS-X.
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |||
United States | ||||
Added Value LLC | California | |||
AKQA, Inc. | California | |||
Mirum LLC | California | |||
Possible Worldwide, LLC | California | |||
A. Eicoff & Company, Inc. | Delaware | |||
Acceleration eMarketing Inc | Delaware | |||
Action Exchange, LLC | Delaware | |||
ARCTOUCH LLC | Delaware | |||
Benenson Strategy Group, LLC | Delaware | |||
Bottle Rocket LLC | Delaware | |||
Burson-Marsteller, LLC | Delaware | |||
Catalyst Online LLC | Delaware | |||
CHI Wunderman Partnership LLC | Delaware | |||
CMI Media, LLC | Delaware | |||
Competitive Media Reporting, LLC | Delaware | |||
DeepLocal Inc. | Delaware | |||
Essence Global LLC | Delaware | |||
Finsbury LLC | Delaware | |||
Grey Global Group LLC | Delaware | |||
Group M Worldwide, LLC | Delaware | |||
Group SJR LLC | Delaware | |||
GTB Agency, LLC | Delaware | |||
Hill and Knowlton Strategies, LLC | Delaware | |||
Hogarth Worldwide Inc. | Delaware | |||
International Meetings & Science LLC | Delaware | |||
J. Walter Thompson Company LLC | Delaware | |||
J. Walter Thompson U.S.A., LLC | Delaware | |||
Kantar Health LLC | Delaware | |||
Kantar LLC | Delaware | |||
Kantar Retail, LLC | Delaware | |||
KBM Group LLC | Delaware | |||
Landor, LLC | Delaware | |||
Lightspeed, LLC | Delaware | |||
Marketing Direct LLC | Delaware | |||
Marketplace Ignition, LLC | Delaware | |||
Mediacom Worldwide LLC | Delaware | |||
Metavision Media, LLC | Delaware | |||
Ogilvy Commonhealth Worldwide LLC | Delaware | |||
Ogilvy Public Relations Worldwide LLC | Delaware | |||
Penn, Schoen & Berland Associates, LLC | Delaware |
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
PERQ/HCI, LLC | Delaware | |
Pierry, Inc | Delaware | |
Possible Mobile, LLC | Delaware | |
Promotion Execution Partners, LLC | Delaware | |
Rasor Holdings LLC | Delaware | |
RB/TDM Holdings, LLC | Delaware | |
Rockfish Interactive LLC | Delaware | |
Spafax Networks LLC | Delaware | |
Sudler & Hennessey, LLC | Delaware | |
Swift + POSSIBLE LLC | Delaware | |
Taxi Inc. | Delaware | |
Team Garage LLC | Delaware | |
The Exchange Lab Inc | Delaware | |
The Futures Company Worldwide LLC | Delaware | |
The Glover Park Group, LLC | Delaware | |
The Lacek Group LLC | Delaware | |
The Ogilvy Group, LLC | Delaware | |
The Seattle Wunderman Network, LLC | Delaware | |
Viscira, LLC | Delaware | |
Wavemaker Global LLC | Delaware | |
WPP Clapton Square, LLC | Delaware | |
WPP Group Holdings Corp. II | Delaware | |
WPP Group U.S. Finance LLC | Delaware | |
WPP Group USA, Inc | Delaware | |
WPPIH 2001, Inc. | Delaware | |
Wunderman Data Management, LLC | Delaware | |
Xaxis US, LLC | Delaware | |
Xaxis, LLC | Delaware | |
Young & Rubicam LLC | Delaware | |
Reese Communications Companies, Inc. | District of Columbia | |
VML, LLC | Missouri | |
Wunderman Worldwide, LLC | Nevada | |
Geometry Global LLC | New York | |
GHG GreyHealth Group LLC | New York | |
GWE LLC | New York | |
Mindshare USA, LLC | New York | |
Ogilvy & Mather Worldwide, LLC | New York | |
WPP Montagu Square LLC | New York | |
SET Management, LLC | Oregon | |
Public Strategies, Inc. | Texas |
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COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |||
Non-US | ||||
MindShare Argentina S.A. | Argentina | |||
Active Sites Alive Pty Limited | Australia | |||
M Media Group Pty Ltd | Australia | |||
Mediacom Australia Pty Limited | Australia | |||
Ogilvy & Mather (Sydney) Pty Limited | Australia | |||
Ogilvy Public Relations Worldwide Pty Limited | Australia | |||
Taylor Nelson Sofres Australia Pty Limited | Australia | |||
The Brand Agency Pty Limited ATF Brand Agency Unit Trust | Australia | |||
Wavemaker Australia Pty Limited | Australia | |||
WPP AUNZ LIMITED | Australia | |||
MediaCom – die Kommunikationsagentur GmbH | Austria | |||
J Walter Thompson Middle East and North Africa E.C. | Bahrain | |||
GroupM Belgium SA | Belgium | |||
FBIZ Comunicacao Ltda | Brazil | |||
GPAT S.A.—Propaganda e Publicidade | Brazil | |||
IBOPE Monitor de Meios Publicitários Ltda. | Brazil | |||
IBOPE Monitor de Verificação Publicitária Ltda | Brazil | |||
J Walter Thompson Publicidade Ltda | Brazil | |||
KANTAR IBOPE Participações Ltda. | Brazil | |||
KANTAR IBOPE Pesquisa de Mídia Ltda. | Brazil | |||
Maristela Mafei Participações S.A. | Brazil | |||
Mídia 123 Serviços de Publicidade Via Internet Ltda. | Brazil | |||
Ogilvy & Mather Brasil Comunicação Ltda | Brazil | |||
WPP Ideal Participações Ltda | Brazil | |||
WPP Pmweb Participações Ltda | Brazil | |||
Y&R Propaganda Ltda | Brazil | |||
Blast Radius Inc. | Canada | |||
Entreprise de Communications Tank Inc. | Canada | |||
J. Walter Thompson Company Limited La Compagnie J. Walter Thompson Limitee | Canada | |||
Mediacom Canada | Canada | |||
MindShare Canada | Canada | |||
Wavemaker Canada Inc. | Canada | |||
WPP Group Canada Finance, Inc. | Canada | |||
Always (Shanghai) Marketing Services Co Ltd | China | |||
Beijing Benpao Century Technology Development Co., Ltd. | China | |||
Neo@ogilvy | China | |||
Blue Hive Shanghai Advertising Co Ltd | China | |||
GroupM (Shanghai) Advertising Co. Ltd | China | |||
GroupM Market Advertising Co. Ltd. | China |
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
Guangzhou Dawson Marketing Communication Co. Ltd | China | |
Hill & Knowlton (China) Public Relations Co Ltd | China | |
J.Walter Thompson Bridge Advertising Co. Ltd. | China | |
Kinetic Advertising (Shanghai) Co. Ltd | China | |
Millward Brown ACSR Co. Ltd | China | |
Shanghai Easycom Advertising Co., Ltd. | China | |
Shanghai Linjie Marketing Services Co. Ltd. | China | |
Shanghai Ogilvy & Mather Advertising Ltd | China | |
Sinotrust International Information & Consulting (Beijing) Co. Ltd. | China | |
MediaCom Praha s.r.o. | Czech Republic | |
WAVEMAKER Czech s.r.o. | Czech Republic | |
Dis/Play AS | Denmark | |
MediaCom Danmark A/S | Denmark | |
Millward Brown ApS | Denmark | |
WPP Holding Denmark A/S | Denmark | |
Wunderman A/S | Denmark | |
CT Finances SA | France | |
Kantar SAS | France | |
KR MEDIA France SAS | France | |
MEC SAS | France | |
Mediacom Paris SA | France | |
Ogilvy & Mather S.A.S | France | |
Regional Management Group SAS | France | |
Sofres Asia Pacific SAS | France | |
Taylor Nelson Sofres SAS | France | |
Commarco GmbH 120274 | Germany | |
EMNID Gesellschaft mit beschränkter Haftung | Germany | |
Essence Global Germany GmbH | Germany | |
Geometry Global GmbH | Germany | |
GREY Düsseldorf GmbH | Germany | |
GroupM Competence Center GmbH | Germany | |
HERING SCHUPPENER Healthcare Unternehmensberatung für Gesundheitskommunikation GmbH | Germany | |
Hirschen Group GmbH | Germany | |
Kantar Deutschland GmbH | Germany | |
Kantar Live GmbH | Germany | |
Mather Direct GmbH | Germany | |
MediaCom Agentur für Media-Beratung GmbH | Germany | |
Mindshare GmbH | Germany | |
PATH GmbH | Germany | |
plista GmbH | Germany | |
Syzygy AG | Germany |
2
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
thjnk ag | Germany | |
Wavemaker GmbH | Germany | |
WPP Deutschland Holding GmbH & Co. KG | Germany | |
WPP Marketing Communications Germany GmbH | Germany | |
Young & Rubicam Group Germany GmbH | Germany | |
Agenda Group (Asia) Limited | Hong Kong | |
BATES CHINA LIMITED | Hong Kong | |
GroupM Limited | Hong Kong | |
MindShare Hong Kong Limited | Hong Kong | |
Ogilvy & Mather Marketing Communications Limited | Hong Kong | |
Wavemaker Hong Kong Limited | Hong Kong | |
WPP Marketing Communications (Hong Kong) Limited | Hong Kong | |
AnalyticsQuotient Services India Private Limited | India | |
Encompass Events Private Ltd | India | |
GroupM Media India Pvt Ltd | India | |
Hindustan Thompson Associates Private Limited | India | |
MediaCom Communications Pvt Ltd | India | |
Mediaedge:cia India Pvt Ltd | India | |
Ogilvy & Mather Pvt Ltd | India | |
TNS India Private Limited | India | |
Millward Brown Ireland Ltd | Ireland | |
WPP Ireland Limited | Ireland | |
FAST Srl | Italy | |
GroupM Srl | Italy | |
Mediacom Italia Srl | Italy | |
Mindshare SpA | Italy | |
Sentrix Global Health Communications Srl | Italy | |
Wavemaker Italia S.r.l. | Italy | |
Wavemaker Maxus S.r.l. | Italy | |
Xtel Srl | Italy | |
Geometry Global Japan GK | Japan | |
GroupM Japan KK | Japan | |
J Walter Thompson Japan GK | Japan | |
WPP Scangroup Limited | Kenya | |
WPP Luxembourg Gamma Three Sarl | Luxembourg | |
WPP Luxembourg Sarl | Luxembourg | |
WPP Business Services Sdn. Bhd. | Malaysia | |
WPP Marketing Communications (Malaysia) Sdn Bhd | Malaysia | |
MindShare de México, S.A. de C.V. | Mexico | |
Mirum, S.A. de C.V. | Mexico | |
The GroupM ESP Clever Company S.R.L. de C.V. | Mexico | |
The GroupM ESP Trading Company, S.R.L. de C.V. | Mexico |
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
Worldwide Mediacom México, S.A. de C.V. | Mexico | |
WPP México, S. de R.L. de C.V. | Mexico | |
Berkeley Square Holding BV | Netherlands | |
Cavendish Square Holding BV | Netherlands | |
Greenhouse Group B.V. | Netherlands | |
GroupM B.V. | Netherlands | |
Lightspeed Research B.V. | Netherlands | |
MediaCom B.V. | Netherlands | |
Millward Brown/Centrum BV | Netherlands | |
Russell Square Holding BV | Netherlands | |
Taylor Nelson Sofres BV | Netherlands | |
WPP Purgos Two B.V. | Netherlands | |
WPP Square one B.V | Netherlands | |
WPP Holdings (New Zealand) Limited | New Zealand | |
MediaCom AS (Norway) | Norway | |
GroupM Pakistan (Private) Ltd | Pakistan | |
Memac Ogilvy & Mather Holding Inc. | Panama | |
MediaCom—Warszawa Sp.z.o.o. | Poland | |
MindShare Polska Sp. z.o.o. | Poland | |
Wavemaker Sp.z.o.o | Poland | |
M/SIX, Lda. | Portugal | |
Mediaedge:CIA—Servicos Publicitarios Ltda | Portugal | |
Diamond Ogilvy LLC | Republic of Korea | |
Kantar Korea Ltd | Republic of Korea | |
LLC ‘GroupM’ | Russia | |
LLC ‘MEC’ | Russia | |
LLC ‘Mindshare’ | Russia | |
Mediacom LLC (Russia) | Russia | |
Mindshare For Advertising and Promotion Company L.L.C (Moshaarakat Al Ryee) | Saudi Arabia | |
GroupM Asia Pacific Holdings Pte Ltd | Singapore | |
GroupM Singapore Pte Ltd | Singapore | |
Ogilvy & Mather (Singapore) Private Ltd | Singapore | |
Grey Group South Africa (Proprietary) Limited | South Africa | |
Kantar South Africa (Pty) Limited | South Africa | |
Mindshare South Africa (Gauteng) (Proprietary) Limited | South Africa | |
Ogilvy and Mather Johannesburg (Proprietary) Limited | South Africa | |
Wavemaker (Pty) Ltd | South Africa | |
GroupM Publicidad Worldwide SA | Spain | |
Kantar Media S.A. | Spain | |
Maxus Spain SL | Spain | |
Mediacom Iberia SA | Spain | |
Mindshare Spain SA | Spain | |
Taylor Nelson Sofres S.A. (in Spain) | Spain | |
The Cocktail Global, S.L. | Spain |
3
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
Wavemaker Publicidad Spain S.L. | Spain | |
WPP Holdings Spain, S.L. | Spain | |
WPP SERVICES SPAIN SL | Spain | |
TNS Sifo AB | Sweden | |
Mediacom AG | Switzerland | |
Wavemaker Taiwan Ltd | Taiwan | |
WPP (Thailand) Ltd | Thailand | |
MediaCom Istanbul Medya Hizmetleri A.S. | Turkey | |
Mindshare Medya Hizmetleri A.S. | Turkey | |
Wavemaker İletişim Planlama Hizmetleri Limited Şirketi | Turkey | |
Asdaa Advertising FZ LLC | United Arab Emirates | |
MEC MENA FZ LLC | United Arab Emirates | |
Memac Ogilvy & Mather LLC | United Arab Emirates | |
Mindshare Advertising LLC | United Arab Emirates | |
Added Value Limited | United Kingdom | |
AKQA Limited | United Kingdom | |
Beaumont Square | United Kingdom | |
Chi & Partners Limited | United Kingdom | |
Cognifide Limited | United Kingdom | |
Cordiant Communications Group Limited | United Kingdom | |
Design Bridge Limited | United Kingdom | |
Dialogue Marketing Partnership Limited | United Kingdom | |
EffectiveBrands Limited | United Kingdom | |
Enduring Organisation Three | United Kingdom | |
Essence Global Group Limited | United Kingdom | |
G2 Branding and Design Limited | United Kingdom | |
GMT+0 Limited | United Kingdom | |
Grey Advertising Limited | United Kingdom | |
GroupM UK Digital Limited | United Kingdom | |
GROUPM UK Ltd | United Kingdom | |
Hill & Knowlton Limited | United Kingdom | |
Hogarth Worldwide Limited | United Kingdom | |
J. Walter Thompson Group Limited | United Kingdom | |
Kantar Media UK Ltd | United Kingdom | |
Kantar Retail UK Limited | United Kingdom | |
Kantar UK Limited | United Kingdom | |
Kinetic Worldwide Limited | United Kingdom | |
KR Media UK Limited | United Kingdom | |
Lightspeed Research Ltd | United Kingdom |
COMPANY NAME | JURISDICTION UNDER WHICH ORGANISED | |
Maxus Communications (UK) Limited | United Kingdom | |
MediaCom Group Limited | United Kingdom | |
Mediacom North Limited | United Kingdom | |
Mediaedge:CIA Worldwide Limited | United Kingdom | |
Millward Brown UK Limited | United Kingdom | |
Mindshare Media UK Limited | United Kingdom | |
Mortimer Square Limited | United Kingdom | |
Motion Content Group Limited | United Kingdom | |
MSIX Communications Limited | United Kingdom | |
Newcrosse Limited | United Kingdom | |
Ogilvy & Mather Group (Holdings) Limited | United Kingdom | |
Ogilvyone Business Limited | United Kingdom | |
Outrider Limited | United Kingdom | |
Potato London Ltd | United Kingdom | |
Precise Media Monitoring Limited | United Kingdom | |
Research International Group Limited | United Kingdom | |
Salmon Limited | United Kingdom | |
SCI Scientific Communications and Information UK Ltd | United Kingdom | |
Spafax Airline Network Limited | United Kingdom | |
Stickleback Limited | United Kingdom | |
Superunion Limited | United Kingdom | |
The Finsbury Group Limited | United Kingdom | |
TNS Group Holdings Limited | United Kingdom | |
TNS-NFO US | United Kingdom | |
Wavemaker Global Limited | United Kingdom | |
Wavemaker Limited | United Kingdom | |
WPP 2005 Limited | United Kingdom | |
WPP AMC Holdings | United Kingdom | |
WPP Beans Limited | United Kingdom | |
WPP Finance Co. Limited | United Kingdom | |
WPP Group (UK) Ltd | United Kingdom | |
WPP Investments Limited | United Kingdom | |
WPP Jubilee Limited | United Kingdom | |
WPP Ottawa Ltd | United Kingdom | |
WPP Sparkle Limited | United Kingdom | |
WPP Unicorn Limited | United Kingdom | |
Young & Rubicam Development (Holdings) Limited | United Kingdom | |
Young & Rubicam Group Limited | United Kingdom | |
Young & Rubicam Holdings (UK) Limited | United Kingdom | |
WPP Media Ltd | Vietnam |
4