Comcast Is Breaking Up: The $90 Billion Debt, the Problem, and the Value

One Stock, Two Very Different Businesses

Comcast currently trades around $25 per share with an equity market cap of roughly $89 billion. On the surface that looks cheap — the stock trades at about 8 times trailing earnings. But that single share currently owns 2 fundamentally different economic engines that the market is struggling to value together: a cash-generative but subscriber-losing broadband and wireless business, and a global entertainment empire containing NBC, Peacock, Universal Studios, and Universal theme parks.

The breakup thesis is simple. When you bundle a cable company and a Hollywood studio under one ticker, investors tend to apply the lower cable multiple to the whole thing. Separate them, and each business can trade at a multiple appropriate to its own economics and growth outlook. That is the value unlock Comcast management is betting on — and it is expected to happen around mid-2027 through a tax-free spin-off of NBCUniversal and Sky to existing shareholders.

This is actually the second phase of Comcast's simplification. On January 2, 2026, Comcast already completed the spin-off of Versant Media Group — containing MSNBC, CNBC, USA Network, Golf Channel, E!, SYFY, and Fandango — giving shareholders 1 Versant share for every 25 Comcast shares they owned. The upcoming NBCUniversal separation is far larger and more consequential.

What Each Company Will Actually Contain

After the split, existing Comcast shareholders are expected to own shares in 2 companies. The first is a streamlined Comcast focused on connectivity and technology — essentially Xfinity broadband, Xfinity Mobile, Comcast Business, and the underlying U.S. network infrastructure reaching more than 65 million homes and businesses. Michael Angelakis, former Comcast CFO, is expected to return as CEO of this entity.

The second company is NBCUniversal, led by current Comcast president Mike Cavanagh. It will contain NBC, Telemundo, Peacock, Bravo, NBC Sports rights, Universal Pictures, Universal Television, Universal Destinations and Experiences theme parks, and Sky's European media business. This becomes a standalone global entertainment company with significant IP, streaming, and physical experience assets — none of which requires owning a single cable wire.

One important nuance: Comcast may retain up to 19.9% of NBCUniversal for up to a year after the spin before monetizing that stake in a tax-efficient manner, using the proceeds to help pay down debt. So the structure is not a clean 100% distribution from day one, though shareholders ultimately benefit from both pieces.

The Broadband Problem Is Real

The post-spin Comcast is a high-margin, cash-generative business — but it faces structural headwinds that the breakup does not fix. In Q2 2026 Comcast lost 167,000 broadband customers and 280,000 video customers. It has been losing broadband customers for several consecutive quarters as fiber overbuilders and fixed wireless alternatives take share. Comcast CFO Jason Armstrong acknowledged at a September 2026 Goldman Sachs conference that fiber is now overbuilding roughly 4% to 5% of Comcast's footprint annually, up from the historical 2% to 3%, and that fixed wireless has taken more share than the company expected.

That is the central debate for post-spin Comcast. The connectivity business generated roughly $8 billion in adjusted EBITDA in Q2 alone at a 40% margin, and Comcast Business remains one of the most profitable connectivity businesses in America at nearly 57% EBITDA margins. Xfinity Mobile is growing wireless lines rapidly. But if broadband customers keep declining, the fixed-cost leverage works against the company. The bull case is that wireless deepens relationships, packaging innovations stabilize broadband, and the physical network remains too expensive for competitors to fully replicate. The bear case is that fiber and fixed wireless structurally erode the subscriber base and pricing power for years to come.

The Hidden Value: NBCUniversal

This is the more interesting investment question. NBCUniversal as a standalone company owns assets that are genuinely difficult to replicate: one of the 4 remaining broadcast networks in NBC, Peacock which reached 48 million paid subscribers as of June 2026, the Universal film and television studio with one of the deepest IP libraries in Hollywood, and Universal theme parks which are among the most profitable physical entertainment experiences in the world. Sky adds a substantial European media and streaming presence.

The thesis is straightforward. These assets are currently buried inside a cable company trading at a depressed multiple. Separated, they can attract investors who want entertainment and media exposure without broadband subscriber risk — and potentially trade at a multiple more appropriate to their own economics. Analysts at Rosenblatt valued NBCUniversal at roughly 11 times 2027 EBITDA and the connectivity business at 4.5 times, arriving at a combined sum-of-the-parts value of around $31 per current CMCSA share. Deutsche Bank used similar logic to reach $32. Morningstar is more bullish at $41. At $25 today, the market is not yet pricing in any of those outcomes.

The key variable that will determine whether the value unlock is real is how Comcast divides its approximately $90 billion in net debt between the 2 companies. Management has committed to giving each business an investment-grade balance sheet but has not yet disclosed the final allocation. That number — along with the distribution ratio, standalone financials for each entity, and dividend policies — will be the most important disclosures between now and the mid-2027 closing. Until that information is public, any precise sum-of-the-parts calculation involves meaningful estimation.

Stock Analyzer: CMCSA

Running the stock analyzer with revenue growth assumptions of -2%, 0%, and 2%, profit margins of 11%, 12%, and 13%, free cash flow margins of 11%, 12%, and 13%, and a PE and P/FCF of 5 to 9, the fair value range comes out at a low of $27.77, a middle of $37.59, and a high of $50.89. The implied current price return at the mid scenario is 16.67% annually and 22.19% at the high — against a current price of approximately $25.

What makes these assumptions interesting is that the low scenario assumes negative revenue growth — essentially pricing in continued broadband subscriber losses with no offset from wireless or business services. Even in that pessimistic scenario the stock analyzer suggests fair value of $27.77, implying the stock is cheap even if things get worse. The mid scenario at $37.59 assumes flat revenue with stable margins — a reasonable base case if broadband stabilizes and wireless continues growing. The high scenario at $50.89 requires modest revenue growth, which is plausible if the breakup unlocks NBCUniversal's value and post-spin Comcast is rerated as a pure-play connectivity business. Tag me in the community with questions!

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