We also expect to announce shortly a partnership with a major cloud provider that will offer a marketing development boost to our cloud products. Finally, we continue to explore options to augment our media studio within SMC including working with or acquiring a DSP as we identify ways to compete for a wide range of large and small clients for programmatic media. As 2023 draws to a close, I wanted to reiterate our confidence that the top line challenges that have pressured our business this year are beginning to abate. We expect to see a return to net revenue growth excluding advocacy in the fourth quarter, as customers and the technology and media sectors begin to resume their activities and as customers start to refocus on digital transformation.
2024 promises to be a big year for Stagwell, driven by the spending turnaround among tech customers and on digital transformation, as well as tailwinds from what we expect to be a record breaking political cycle and continued growth in our Marketing Cloud products. As I said last quarter, with growing large company relationships, strong new business momentum, a commitment to managing costs and investment in leading tech products, Stagwell remains strongly positioned to benefit from the long term growth in digital marketing, and in particular, the next revolution of AI based digital transformation in the space. Now, I’d like to hand it over to Frank Lanuto, our Chief Financial Officer, to walk you through some of our financial results in more detail.
Frank Lanuto : Thank you, Mark. Good morning, everyone. And thank you for joining us to discuss our third quarter results. As a reminder, if you would like to ask a question after the prepared remarks conclude, please feel free to submit them through the chat function. In Q3, we continued to make progress improving our operating performance across the business. Revenues were stronger in international markets, as well as our media and data and creative and communications capabilities, which returned to growth despite the ongoing headwinds in the US, our largest market. We also continued to improve operating efficiency and margins with further cost savings in compensation, real estate and a consolidation of back office operations.
As a result, reported revenue for Q3 was $680 million, a decline of 7% as compared to the same period in the prior year. Net Revenue excluding passthrough costs declined 3.8% year-over-year to $535 million. Organic net revenue declined 6.8%. Excluding advocacy, organic net revenue declined 4.6% for the period. Breaking down net revenue by geography, we continued to see strong performance in our international markets. Overall, organic net revenue increased 15% internationally, led by EMEA, which increased 16%, and followed closely by APAC, which grew 14%. In the US, where macroeconomic headwinds, tech company restructurings, and labor strikes in the entertainment and auto industries persisted, organic net revenue declined 9.9%. Despite macro conditions, many of our largest customers continued to demonstrate resilience.
In the third quarter, our top 100 customers, representing approximately 48% of net revenue, grew 18% year-over-year. Although budgets have been compressed to a greater extent by smaller clients, many of our larger clients have continued to invest in marketing spend, supported by the strength of the US consumer. Now turning to revenue by capability, we have now expanded our reporting to include the Stagwell Marketing Cloud group as a new separate capability. For historical like-for-like comparability, please reference the historical core metrics document on the Stagwell investor website. Digital transformation delivered $126 million of net revenue in Q3, a decline of 20% compared to last year. Excluding advocacy, which is in an off election cycle year, the decline was 17%.
As I mentioned previously, challenging macroeconomic conditions continued to weigh on the capability as customers chose to delay the start of business transformation projects. From an industry perspective, financials, healthcare and technology experienced the principal reductions in budgets. Financials were impacted by the banking turmoil earlier in the year, while the healthcare decline was largely driven by the lapping of the end of the pandemic, which saw some customers in the medical testing and diagnostic space pull back. Consumer insights and strategy reported $46 million in net revenue, a decline of 9% year-over-year. Much of the weakness was attributable to the lingering effects of the writer and actor strikes in the second and third quarters.
