Observed Signal · May 5, 2026 · Agency Decision · Source: VideoWeek · Impact: 2/5 · Sentiment: Negative
the7stars Rejects Principal Trading, Citing Transparency Concerns
Independent UK agency the7stars has announced it will never use principal media trading, rejecting the growing but controversial model in order to preserve transparent client billing and auditability. Jenny Biggam, Founder & CEO of the7stars, said clients deserve clarity on where and how media budgets are spent. The remarks come in an interview filmed at New Video Frontiers 2026 in London and were published by VideoWeek on 5 May 2026. The piece focuses on transparency in the advertising supply chain and warns that principal trading risks “muddying the cost” of media by obscuring inventory sources and fees.
The7stars' public refusal of principal trading highlights transparency concerns in media buying that could influence client expectations and agency practices, but the change is limited to a single agency and not a platform‑level policy or regulation.
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Key Takeaways & Evidence Grounding
- Independent agency the7stars has decided it will never use principal media trading.
- Jenny Biggam, Founder & CEO of the7stars, said clients benefit from full transparency and audit rights.
- The interview was filmed at New Video Frontiers 2026 in London.
- The article was published on VideoWeek on 2026-05-05 by reporter Dan Meier.
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Principal Media's Rise: Agencies Face a New Reality
The article analyzes how global ad holding companies are expanding principal-based media trading—where agencies buy media on their own books and monetize the spread—creating a multibillion-dollar revenue stream that can misalign agency and client incentives. It traces the issue from historical rebate controversies through recent disclosures in Foster v. WPP, where a 2024 memo revealed GroupM’s "non-product-related income" exceeded $1 billion in 2023 and was forecast to grow. The Trade Desk publicly criticized principal-based practices and agency transparency, while industry bodies like the ANA urge marketers to understand benefits, risks and governance needs. Executives quoted (Publicis, WPP, Omnicom) acknowledge principal media exists but differ on strategic emphasis. The piece warns the mechanics will evolve but the incentives for holdcos to pursue high-margin principal revenues are likely to persist.
AdTech Showdown: Transparency vs. Opacity in Advertising
Adweek analyzes the recent conflict between The Trade Desk and Publicis, which began after Publicis advised clients to stop using The Trade Desk following a failed audit. The Trade Desk’s stock fell roughly 13% after the news, and major holding companies Dentsu and WPP had already exited The Trade Desk’s OpenPath direct-supply product. The article argues the dispute reflects a deeper, long-standing industry problem: an ecosystem that depends on opacity and hidden fees. It describes The Trade Desk’s transparency-oriented moves (OpenPath, a free identity solution, and buyer-controlled payment options) and notes implementation issues—confusing fee communication, Kokai interface concerns, and difficult client access to data. The author recommends three industry steps: probe agencies on true transparent pricing, stop supporting vendors that enable opacity, and refocus media efforts on provable brand growth.
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