Campaign Red analysis reveals how the merged entity compares to rivals Publicis Groupe, WPP, Dentsu and Havas.
1) Combined organic growth for Omnicom and IPG roughly flat across 2025 so far
It's difficult to make accurate assessments of Omnicom's organic growth given it does not report net revenue like the other big holding groups – something Arthur Sadoun, the chief executive of Publicis Groupe recently criticised as “apples and oranges accounting”. In lieu of a better measure, Omnicom came in second position with 3% organic revenue growth (including pass-through costs) for the first nine months of the year. IPG has struggled with positive growth during 2025, reporting -3.3% organic net revenue (minus pass-through costs) growth for the year to date, putting it just above bottom-placed WPP (-4.8%).
When combined, the newly merged entity will have seen roughly flat organic growth across the year so far (-0.3%). Publicis Groupe continues to lead the holding company pack in this metric, reporting 5.5% organic growth so far this year. Havas came in third with 2.8% and Dentsu fourth with 0.3%.
2) Omnicom and IPG’s combined revenue much larger than the rest
Together, Omnicom and IPG accumulated around $18 billion in revenue across the year, a significant lead on the other the holding companies. As previously stated, however, Omnicom does not report net revenue, so this estimation is not a like-for-like comparison. The figure is based on the $6.3 billion net revenue of IPG in 2025 so far and Omnicom's total revenue of $11.7 billion in the same period.
3) Omnicom, IPG share prices relatively stable compared to the rest
Share prices across the "big six" have struggled to grow in 2025, relative to each of their closing prices on the last day of 2024. However, Omnicom and IPG’s shares prices remained relatively stable in comparison. By the end of October, Havas fared the best, down 6% to €1.52 on 31 October 2025. IPG and Omnicom came second and third respectively in this growth metric – IPG was down 8% to $25.66 while Omnicom was down 13% to $75.02. WPP has struggled the most with share price growth in 2025. It closed at 287.5 GBX on 31 October, down 65% from 31 December 2024 (827.4 GBX).
4) IPG’s Initiative is the new entity’s top performer in new-business across 2025 so far
Initiative, owned by IPG, is the top media agency performer in new-business across both former groups so far this year, according to preliminary COMvergence data as of 5 November 2025. The agency has accumulated $1.4 billion in new billings, thanks in large part to its Paramount and Bayer wins. It has also generated $837.9 million worth of retentions so far. Top performing agencies from Omnicom so far this year include PHD and Hearts & Science, with accounts such as Volkswagen playing a key role.
5) ‘Spreadbeats’ and ‘The last photo’ campaigns key to previous creative success
Between 2022-25, entrants of global advertising awards under the Omnicom and IPG umbrellas collectively won 3,178 awards, around a third of all prizes awarded in this period. While winners from IPG tended to skew towards North America, Omnicom's winners skewed towards Europe. Most awarded campaigns for IPG included FCB's "Spreadbeats" and "Dreamcaster" campaigns, while for Omnicom it was "The last photo" (Adam & Eve/DDB) and "Missing Matoaka" (BBDO). Overall, FCB is the new entity's top-performing creative agency in awards.
A version of this article first appeared on Campaign Red
