SCHEDULE: Comscore Stakeholder Update: WPP & Cavendish Filing

Cavendish Square Holding B.V. and WPP plc have filed an amendment to their Schedule 13D concerning their beneficial ownership of comScore, Inc. common stock.

Summary

• This filing is an amendment (Amendment No. 7) to a Schedule 13D originally filed on April 7, 2015, by Cavendish Square Holding B.V. ('Cavendish') and WPP plc ('WPP').
• The filing relates to the common stock of comScore, Inc. ('the Company').
• Cavendish Square Holding B.V. is a private limited liability company incorporated in the Netherlands.
• WPP plc is a public limited company formed in Jersey, and it indirectly holds 100% of Cavendish through a series of holding companies.
• As of the date of this amendment, Cavendish is deemed to beneficially own 565,968 shares of comScore's common stock.
• This ownership represents approximately 3.8% of comScore's outstanding common stock.
• The outstanding shares figure is based on comScore's Annual Report on Form 10-K filed on March 26, 2026, which stated 15,023,514 shares outstanding as of March 16, 2026.
• WPP plc, by virtue of its indirect ownership of Cavendish, may also be deemed to have beneficial ownership of these shares.
• Both Cavendish and WPP plc may be deemed to have shared power to vote and dispose of these shares.
• The Reporting Persons (Cavendish and WPP plc) ceased to be beneficial owners of more than five percent of comScore's outstanding common stock on December 29, 2025.
• This cessation was solely due to an increase in the aggregate amount of comScore's outstanding common stock on that date.
• Neither reporting person nor their executive officers or directors have been convicted in criminal proceedings or been party to civil proceedings resulting in judgments related to securities laws violations in the past five years.

Sentiment

Score: 3

Explanation: StockSavvy.ai views this filing as having a neutral to slightly negative sentiment due to the reporting persons no longer meeting the 5% ownership threshold, indicating a potential reduction in their relative stake or influence.

Positives

• The filing clarifies the current beneficial ownership stake of Cavendish and WPP plc in comScore, Inc., which stands at 3.8%.
• The reporting persons have confirmed no criminal convictions or adverse securities law judgments against them or their key personnel in the last five years.

Negatives

• The filing indicates that Cavendish and WPP plc are no longer beneficial owners of more than five percent of comScore's outstanding common stock, a decrease from a previous threshold.
• The reason for no longer meeting the five percent threshold is attributed to an increase in the total number of outstanding shares, potentially diluting the reporting persons' relative stake.

Risks

• The primary risk is the potential for further dilution of ownership if comScore's outstanding shares continue to increase.
• While not explicitly stated as a risk in this filing, a significant decrease in ownership percentage could impact the reporting persons' influence or strategic interests in comScore.

Future Outlook

The filing does not contain specific forward-looking statements or guidance from comScore, Inc. It solely pertains to the reporting persons' beneficial ownership status.

Industry Context

StockSavvy.ai notes that this filing is a routine disclosure under SEC regulations for significant shareholders. WPP plc, a major advertising and communications services group, indirectly holding a stake in a data analytics company like comScore, reflects the ongoing convergence of media, data, and technology within the advertising industry.

Legal Proceedings

• During the past five years, neither of the Reporting Persons nor, to the knowledge of the Reporting Persons, any of their respective executive officers or directors, has been convicted in a criminal proceeding (excluding traffic violations and similar misdemeanors).
• During the past five years, neither of the Reporting Persons nor, to the knowledge of the Reporting Persons, any of their respective executive officers or directors, has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which such person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Stakeholder Impact

• Shareholders of comScore, Inc.: The filing provides transparency regarding the ownership stake of significant entities, which can inform investment decisions.
• WPP plc and Cavendish Square Holding B.V.: The filing confirms their current ownership level and their status relative to the 5% beneficial ownership threshold.

Next Steps

• The reporting persons will continue to file amendments to Schedule 13D as required by SEC regulations if there are any material changes in their beneficial ownership or other relevant information.
• comScore, Inc. will continue its operations as disclosed in its regular SEC filings.

Key Dates

Keywords

Schedule 13D, comScore, WPP plc, Cavendish Square Holding B.V., beneficial ownership, common stock, SEC filing, amendment, securities, reporting persons