The Competition Commission of India’s investigation into alleged cartelisation in India’s advertising industry has widened beyond Dentsu, with two more independent agencies now cooperating with CCI investigators to help decode suspected collusion among major agencies and broadcasters. The development, reported on September 28, 2026, signals that the probe first triggered by Dentsu’s 2024 leniency disclosure is drawing in a broader set of industry participants.
The CCI is examining commercial practices spanning pricing, discounts, commissions, and arrangements involving broadcasters. A notice issued on March 19, 2026 to an independent agency sought specific details about joint industry meetings and a media buying deal tied to a major advertiser, underlining how granular the regulator’s inquiry has become.
How Did The CCI Ad Cartel Probe Start?
The investigation traces back to February 2024, when Dentsu disclosed information under the CCI’s leniency programme, effectively becoming the case’s original whistleblower. The agency said at the time: “We had a choice – to remain passive or drive change,” and has since implemented enhanced audits, stricter governance, and tighter internal controls. That disclosure set off a chain of events, including March 2025 search-and-seizure operations at major advertising agencies as well as industry bodies including the Advertising Agencies Association of India (AAAI), the Indian Society of Advertisers (ISA), and the Indian Broadcasting and Digital Foundation (IBDF).
What Does A Widening Probe Mean For India’s Ad Industry?
With two more independent agencies now assisting investigators, the CCI’s inquiry appears focused on establishing whether the commercial practices under review, fee structures, discount arrangements, and broadcaster deals, represent isolated transactions or a broader pattern of coordination under Section 3 of the Competition Act, which prohibits anti-competitive agreements. For India’s advertising and media buying ecosystem, a finding of systemic cartelisation could reshape how agencies negotiate rates with broadcasters and clients, and could trigger penalties or structural remedies across some of the country’s largest agency networks.
The probe also has legal pushback attached to it: Madison Communications and Publicis/TLG India have separately challenged the investigation before the Delhi High Court, even as the CCI’s Director General continues the underlying inquiry uninterrupted.
Industry Reaction And Expert Commentary
Dentsu’s public framing of its leniency disclosure as a deliberate choice to “drive change” rather than stay passive has positioned the agency as a reform-minded outlier in an investigation that increasingly implicates the wider industry. With additional agencies now cooperating, legal and compliance experts tracking the case expect the CCI’s Director General report, anticipated around mid-2026 per earlier industry reporting, to carry greater evidentiary weight than initially expected, given the expanding pool of firms providing information.
What Happens Next?
The CCI’s Director General investigation continues despite the Delhi High Court challenges from Madison Communications and Publicis/TLG India. Industry watchers are awaiting the DG’s findings on whether the examined practices amount to coordinated cartel behaviour, a determination that will shape enforcement action against India’s largest advertising and media agencies, and potentially reset how commissions and media buying deals are structured across the sector.
Frequently Asked Questions
Which agencies are now helping the CCI in the ad cartel probe?
Beyond Dentsu, which triggered the investigation through a 2024 leniency disclosure, two more independent advertising agencies are now cooperating with CCI investigators, according to exchange4media’s report.
What commercial practices is the CCI investigating?
The regulator is examining pricing, discounts, commissions, and broadcaster arrangements, including a specific media buying deal tied to a major advertiser referenced in a March 2026 notice.
Which companies are legally challenging the investigation?
Madison Communications and Publicis/TLG India have challenged the CCI’s investigation before the Delhi High Court, though the Director General’s inquiry is continuing regardless.
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