The CTV ad-tech bid for share has a clear new phase: the biggest media owners are no longer just selling streaming inventory — they’re building and consolidating the infrastructure that sells it. This week’s clearest example: Disney is unifying its sell-side under DRAX (the Disney Real-Time Ad Exchange), centralizing how its enormous streaming inventory reaches programmatic buyers. With 157 million ad-supported viewers across Disney+ and its other services, that’s a lot of inventory moving onto one company-controlled exchange.
01What’s happening
The streaming ad-tech stack is consolidating fast. Disney is unifying its sell-side under DRAX, its own real-time exchange, pulling fragmented selling motions into a single, owned programmatic gateway. It’s the Disney parallel to Netflix moving off Microsoft toward a hybrid, self-controlled stack (see our companion piece). The pattern across the industry: CTV programmatic grew roughly 28% year over year to about $36 billion, with Disney, Netflix, Amazon, Roku, and YouTube driving the supply expansion — and each increasingly wanting to own the pipes, not rent them.
02Why this matters
| Premium video inventory is centralizing on owned exchanges | When Disney routes its supply through DRAX and Netflix through its own stack, the most valuable streaming inventory is sold inside environments the media owners control end to end. For independent publishers with video, that's powerful, well-capitalized competition setting the terms. |
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| Owning the exchange means owning the data and the take | A media owner that controls its own SSP/exchange keeps more margin and more first-party signal. It's vertical integration on the sell side — the same logic that made retail media and walled gardens so profitable, now applied to streaming. |
| The independent sell-side matters more, not less | As giants build captive exchanges, a healthy independent SSP layer (the Magnites and PubMatics of the world — see our SSP earnings piece) is what keeps non-giant publishers competitive and gives buyers a reason to look beyond the big owned stacks. |
03What publishers should do
04What marketers should do
05The bottom line
CTV’s first phase was “get an ad tier.” Its second phase is “own the machine that sells it.” Disney consolidating under DRAX and Netflix building its own stack are the same move: vertical integration of streaming ad sales. For independent publishers, the lesson is to stop competing on the giants’ terms and start being the diversification — the trusted, cross-context, independent supply that no single media owner’s exchange can replicate.