| | | | | | | | |
| Name of Subsidiary | | Jurisdiction of Incorporation |
| Carmenere Holding Company | | Delaware, U.S.A. |
| comScore (Beijing) Information Technology Company Limited | | China |
| comScore Argentina S.A. | | Argentina |
| comScore Asia Limited | | Hong Kong |
| comScore Asia Pte Ltd. | | Singapore |
| comScore Australia Pty Limited | | Australia |
| comScore Brand Awareness, L.L.C. | | Delaware, U.S.A. |
| comScore Brazil Ltda. | | Brazil |
| comScore BV | | Netherlands |
| comScore Canada, Inc. | | Canada |
| comScore Chile S.A. | | Chile |
| comScore Colombia SAS | | Colombia |
| comScore CZ s.r.o. | | Czech Republic |
| comScore Europe, LLC | | Delaware, U.S.A. |
| comScore France SARL | | France |
| comScore GmbH | | Germany |
| comScore Holdings LLC | | Delaware, U.S.A. |
| comScore International Inc. | | Delaware, U.S.A. |
| comScore Japan Kabushiki Kaisha | | Japan |
| comScore Mexico, S.A. de C.V. | | Mexico |
| comScore Peru S.A.C. | | Peru |
| comScore Sweden AB | | Sweden |
| comScore Technologies India Private Limited | | India |
| comScore UK Ltd | | United Kingdom |
| comScore Worldnet Europe, S.L.U. | | Spain |
| comScore, S.L.U. | | Spain |
| Conniaco (Finland) OY | | Finland |
| Conniaco (Norway) AS | | Norway |
| Conniaco (Sweden) AB | | Sweden |
| Conniaco B.V. | | Netherlands |
| Creative Knowledge, Inc. | | Delaware, U.S.A. |
| CS Finance BV | | Netherlands |
| CS Worldnet Holding B.V | | Netherlands |
| CS Worldnet US Holdco LLC | | Delaware, U.S.A. |
| CSWS, LLC | | Virginia, U.S.A. |
| Full Circle Studies, Inc. | | Delaware, U.S.A. |
| Hollywood Software, Inc. | | California, U.S.A.. |
| LNKMTR, LLC | | Delaware, U.S.A. |
| M.Labs, LLC | | Delaware, U.S.A. |
| Marketscore, Inc. | | Delaware, U.S.A. |
| Nedstat Ltd | | United Kingdom |
| PLX Acquisition Corp | | Delaware, U.S.A. |