The simple version

A company that sells you one thing every month has an easy way to grow: sell you a second thing. It already has your address, your payment details, and your attention once a month.

That is why the pitch arrives from the company you least expect to make it. It is not entering a new trade. It wants to keep the household it already has.

The results filed on October 22 show why the pitch is getting louder, and they show the limit of it.

The numbers

• Domestic Broadband revenue: $6,241 million for the third quarter of 2026, against $6,550 million a year earlier. The filing prints the change as (4.7%).
• Domestic Wireless Service revenue: $1,050 million, against $915 million a year earlier. The filing prints the change as 14.7%.
• Domestic Convergence Revenue, the company's combined measure of the two: $7,292 million, against $7,466 million. The filing prints the change as (2.3%).
• Total Domestic Broadband Residential Customers: 28,343 thousand, against 28,897 thousand a year earlier, with a net loss of 144 thousand in the quarter.
• Total Domestic Wireless Lines: 10,555 thousand, against 8,941 thousand a year earlier, with net additions of 368 thousand in the quarter.
• Figures are Comcast's, from the exhibit filed with its Form 8-K on October 22, 2026. The company recast its segments beginning in the first quarter of 2026, and the reconciliation table in the same exhibit shows a zero adjustment to all three revenue lines above, so the year-over-year comparison is unaffected.

Why a quick rise on a small item loses to a slow fall on a large one

Growth rates are printed as rates, which makes two of them look like the same kind of thing when they are not. A rate has to be applied to something before it becomes money.

Here one item fell by 4.7 percent and the other climbed by 14.7 percent. The second rate is roughly three times the first. The item it applies to is roughly a seventh the size.

So the smaller item has to climb far faster than that just to stand still against the larger one. The company reports the two together in a single combined line, and that combined line is where the result shows up.

The actual math on 309 million against 135 million

Put the four printed figures side by side. The larger item went from $6,550 million to $6,241 million, so it lost $309 million. The smaller one went from $915 million to $1,050 million, so it gained $135 million.

That gain covers about 44 percent of the loss. The combined line the company prints fell from $7,466 million to $7,292 million, a drop of $174 million, which is the $309 million loss less the $135 million gain.

Those two changes are ours; the five figures are the company's. Note that the two components as printed add to $7,291 million against a printed combined figure of $7,292 million, a one million dollar rounding difference that the filing itself warns about.

What this means

For you as a customer, the pitch is a signal about leverage, not about generosity. A company works hardest to add a second item when the first one is losing households, which is usually when it has the most reason to keep yours.

For reading any company's results, the habit is to refuse to compare two growth rates until you know what each one is applied to. A large rate on a small item is a small amount of money.

And when a company gives you a single combined figure covering two things moving in opposite directions, that figure is doing real work. It is worth asking what is inside it and which way each part is going.

What this is NOT

This is not a view on Comcast as an investment, and not a recommendation about any security. It is also not advice about your own service, pricing, or whether to take any offer. We do not give personalized advice.

It is not a claim about why individual households left or stayed. The filing reports counts and amounts, not reasons, and we are not supplying reasons it does not give.

We have also not worked out what share of the company's home customers hold a phone line. The release states a figure for that, and it is not the two counts above divided into each other, because one of those counts is a number of lines and not a number of households. We have not reconstructed how the release reaches its figure, and nobody should read ours into it.

Sources

• Comcast Corporation, Exhibit 99.1 to Form 8-K filed October 22, 2026, accession 0001628280-26-066783. Third-quarter revenue table and customer metrics table.
• Same exhibit, segment recast reconciliation table and footnote 6, for the zero adjustment to the three revenue lines used above.