CARTA HOLDINGS
Japanese digital advertising group combining adtech platforms and managed services.
Available information varies by company and source.
Profile record updated:
Company facts
- Official name
- CARTA HOLDINGS, INC.
- Entity type
- COMPANY
- Founded
- 2019
- Headquarters
- Toranomon Hills Station Tower, 36F, 2-6-1 Toranomon, Minato-ku, Tokyo 105-5536, Japan
- Company size
- 1,001–5,000
- Market role
- Publisher & Media Owner
- Official website
- cartaholdings.co.jp
What CARTA HOLDINGS does
CARTA HOLDINGS operates a hybrid adtech and marketing services model. It develops and runs proprietary advertising platforms for programmatic buying and integrated campaign execution, then layers managed services on top for advertisers and agencies that want outsourced operations. In parallel, it owns consumer-facing media or commerce properties that generate audience data, ad inventory, and affiliate commerce revenue. Value is created by combining software, media access, operational execution, and ecosystem relationships within the Japanese advertising market.
Category differentiation
CARTA HOLDINGS is a Japanese digital advertising and marketing group, not the US equity management software company Carta. It is also not merely a single DSP product, but a broader holding company spanning adtech, media operations, and owned media assets.
Strategic context
AI-supported assessment from the existing company research; distinguish interpretation from sourced facts.
CARTA HOLDINGS is a Japan-based digital advertising and marketing group operating proprietary adtech platforms, managed advertising operations, and selected media or commerce properties. Its core capabilities centre on programmatic media buying, cross-channel campaign execution, and advertiser-facing platforms such as PORTO DSP and related brand advertising solutions. The company primarily serves advertisers, agencies, and enterprise marketers in Japan, with particular strength in mobile and digital media execution. The business makes money through a hybrid mix of platform economics and service revenue. It earns platform-related income from programmatic media buying and advertising technology usage, service fees from campaign operations and optimisation, and monetisation from owned media or commerce assets through advertising inventory and affiliate activity. Financially and strategically, the company sits within a more complex ownership structure following NTT DOCOMO's 2025 tender offer and the conversion of CARTA into a joint venture with Dentsu.
Business model & monetisation
CARTA HOLDINGS monetises through a mixed model of adtech platform fees, media-spend-related take rates or margins, and managed service fees for campaign execution and optimisation. Its advertiser platforms likely capture revenue through usage of DSP and integrated advertising workflows, while its operations business earns service fees tied to media buying and ad operations. Its owned media and shopping information assets add advertising inventory sales and affiliate commission revenue.
- Programmatic platform revenue
- Percentage take-rate on media spend and platform usage
- Managed advertising operations
- Service fee / retainer tied to campaign execution and optimisation
- Owned media advertising
- Ad-supported inventory sales
- Affiliate commerce revenue
- Performance-based commission
Products & capabilities
No products with linked sources are available in this view.
Products & market categories
Technology
Media Channel
Service
Competitors & alternatives
- Geniee
Japanese adtech and martech platform spanning media buying, monetisation and CRM.
- FreakOut
Japanese adtech group spanning DSP, publisher monetisation and analytics.
Side-by-side comparisons
Recent recorded signals
Dates refer to the source publication. Older entries are historical context, not evidence of a new event.
No sufficiently sourced and dated signals are available for this view.
Explore company relationships
Questions about CARTA HOLDINGS
What is CARTA HOLDINGS?
CARTA HOLDINGS is a Japan-based digital advertising group that operates programmatic adtech platforms, advertiser solutions, managed campaign operations, and selected media or commerce properties.
Who uses CARTA HOLDINGS?
Its main paying customers are brand advertisers, agencies, enterprise marketers, and performance marketing teams seeking advertising technology and outsourced campaign execution in Japan.
How does CARTA HOLDINGS make money?
It earns revenue from platform fees and media-spend-related take rates, managed service fees for campaign operations, and additional advertising and affiliate income from owned media properties.
Sources & coverage
This profile uses public, official and technically observable information. Missing information does not prove that a product or relationship does not exist. The list below does not imply that every profile statement has been verified.
17 publicly documented primary sources and citations linked across the market graph.
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