Roku’s second-quarter results, filed August 6 as an exhibit to its Form 8-K, show platform revenue up 25% year over year to $1.22 billion, with advertising revenue climbing the same 25% to $672.8 million. Buried in the filing is a more telling number for the ad-tech stack underneath CTV: third-party demand-side platforms now account for nearly three-quarters of in-stream video ad spend flowing through Roku’s inventory, running through integrations with Amazon DSP, The Trade Desk, Google DV360, Yahoo, Magnite, Google Ad Manager and FreeWheel, plus a newly announced connection to Smartly via the Roku Ads API. CEO Anthony Wood and CFO Dan Jedda wrote in the shareholder letter that “we remain focused on disciplined execution, investing in long-term growth opportunities, and creating value for shareholders,” a notably restrained tone for a quarter this strong, driven partly by the pending $22 billion Fox acquisition announced in June, which led Roku to skip its usual earnings call and forward guidance.
The 75% DSP dependency figure matters more than the topline growth number for anyone buying or managing CTV inventory. Roku controls the screen and the ad server, but the majority of the money moving through it is routed by demand-side platforms it does not own, meaning pricing power, targeting logic and measurement standards for a large share of Roku’s ad business are effectively set by DSP partners rather than by Roku itself. That is the same supply-versus-demand tension playing out across programmatic CTV broadly, where owning the inventory increasingly matters less than controlling the decisioning layer that routes bids to it.
The original insight: Roku’s restrained shareholder letter, paired with its heavy DSP reliance, suggests the company is positioning itself as inventory infrastructure for the Fox deal rather than as an independent ad-decisioning platform competing with the DSPs it depends on, a strategic posture that will only sharpen once Fox’s own ad sales operation is layered on top. Related coverage: MarTech reported on CTV consolidation and MNTN’s growth underneath it and on ad decisioning migrating to the supply side at Magnite, both describing the same structural shift in miniature.
Source: Roku SEC Form 8-K Exhibit 99.1
