The latest media campaign Ireland figures show a market being shaped less by domestic reviews and more by international decisions. In the first half of 2026, Dentsu came out on top in Ireland’s media agency new business rankings, but the wider story is about how global pitches, retentions and centralised group structures are redefining competition across the sector.
Fresh data from COMvergence’s H1 2026 New Business Barometer tracked 28 media account moves and pitches in Ireland, representing roughly €40.5 million in reviewed media spend. While the headline ranking puts Dentsu first, a closer look reveals a more complex picture for agencies, advertisers and anyone following a major media campaign Ireland trend.
Media Campaign Ireland Rankings: Dentsu Takes the Top Spot
COMvergence ranked Dentsu as the leading media agency group in Ireland for the first six months of 2026, with about €14.7 million in total new business including retentions. That performance was driven primarily by two major accounts:
- Heineken – approximately €10.4 million
- Netflix – approximately €4.8 million
WPP Media placed second with around €5.5 million, supported by wins including Jaguar Land Rover, Just Eat and Demant Group. Core and Omnicom Media followed with approximately €2.6 million each.
At individual agency level, the strongest performers were:
- Red Star – approximately €10.4 million
- iProspect – approximately €4.8 million
- Mindshare – approximately €4.5 million
- PHD – approximately €2.6 million
- Spark Foundry Ireland – approximately €1.9 million
These results underline how a small number of large reviews can heavily influence a media campaign Ireland leaderboard, especially in a relatively compact market.
Why Retentions Matter as Much as New Wins
One of the most important takeaways from the data is that gross rankings do not always tell the full story. Nearly half of all reviewed spend in Ireland during H1 2026, about €19.4 million or 49%, was tied to retained accounts. That means incumbent agencies successfully defended a substantial amount of business.
When retentions are excluded, the rankings shift significantly:
- Dentsu was approximately €500,000 down on a net basis
- WPP Media posted around €2.9 million in net new business
- Omnicom Media delivered around €2 million
- Core recorded roughly €700,000
For anyone analysing the media campaign Ireland landscape, this distinction is crucial. Retained business reflects stability and client confidence, but net new wins often provide a clearer measure of growth momentum.
Global and Regional Pitches Are Reshaping Ireland
Perhaps the biggest structural insight from the report is the growing dominance of regional and global account reviews in Ireland. Of the €40.5 million reviewed in H1, only around €13.2 million came from pitches originating in the Irish market. The remaining €27.3 million was linked to regional or global reviews.
That means international decisions accounted for the majority of reviewed spend, making global alignment increasingly influential in any media campaign Ireland outcome. While local pitches represented 58% of media spend reviewed globally by COMvergence, in Ireland they made up just 28%.
This imbalance suggests several things:
- Irish agencies are increasingly affected by multinational advertiser strategy
- Large network affiliations matter more than ever
- Local market expertise alone may not be enough to secure major accounts
- Decision-making is becoming more centralised across regions
For brands, this may improve consistency across markets. For agencies, it raises the stakes in network-wide performance, data capability and integrated planning.
The Biggest Accounts Behind the H1 Shift
A handful of major advertisers had an outsized impact on the Irish rankings. The largest accounts reviewed during the period were:
- Heineken – approximately €10.4 million
- Netflix – approximately €4.8 million
- Allianz Health & Life – approximately €2.8 million
- Jaguar Land Rover – approximately €2.1 million
- Adidas – approximately €2.1 million
In a market the size of Ireland, accounts at this level can materially alter agency standings in a matter of months. That is why any assessment of the media campaign Ireland market needs to go beyond simple rank order and examine where billings are concentrated.
What the Irish Results Mean in a Global Context
Ireland’s H1 picture looks very different when compared with broader international performance. In the UK, WPP Media led the first half of the year. Globally, Publicis Media took the top position among the five largest agency groups, ahead of Omnicom Media and WPP Media.
Dentsu’s Irish success also contrasts with its global net position, where losses outweighed wins and retentions, leaving the group in negative territory for H1 overall. This contrast highlights an important point: a strong media campaign Ireland result does not always mirror global agency momentum.
COMvergence also pointed to a broader market shift: more advertiser business is being assigned to bespoke, centralised solutions run directly by holding groups rather than traditional standalone agency brands. These centralised operations accounted for $5 billion, or 26%, of the $19.2 billion in global reviewed media spend during H1 2026.
This trend could have lasting implications for agency structures in Ireland, including:
- Greater use of cross-market operating models
- Less reliance on individual agency brands
- More emphasis on group-level capabilities and proprietary tools
- Higher pressure on independents to differentiate
What Brands and Agencies Should Watch Next
The H1 2026 data suggests the Irish market is entering a period where scale, international alignment and account retention will be as important as outright new-business wins. For advertisers planning a media campaign Ireland strategy, choosing the right partner may increasingly depend on cross-border coordination, data infrastructure and access to specialist centralised resources.
Agencies, meanwhile, will need to balance local responsiveness with the demands of global pitch ecosystems. Success in Ireland now depends not only on market knowledge, but also on how well a group can compete in multinational reviews and defend key relationships.
Independent agencies still have opportunities, particularly where agility, specialist thinking and senior attention can outperform network complexity. But the numbers show that the centre of gravity in the market is moving upward, toward regional and global control.
Conclusion
The H1 rankings confirm that media campaign Ireland is no longer shaped mainly by local pitches alone. Dentsu may have led the table, but the deeper story is one of global influence, retention-driven results and a fast-evolving agency model. For brands and media professionals alike, the key takeaway is clear: understanding Ireland’s market now requires looking well beyond Ireland itself.
