Comcast Corp., US20030N1019

Comcast stock falls as broadband losses weigh on outlook

Published on 09/20/2026 at 18:34 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

Comcast stock fell 6.3 percent after CFO Jason Armstrong flagged no easing in broadband customer losses. The shares traded at USD 22.74 on September 18, 2026, with market cap at USD 80.69 billion.

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Comcast Corp. (ISIN US20030N1019) stock came under pressure after CFO Jason Armstrong said broadband customer attrition shows no sign of easing in the third quarter, and stocktwits reported a 6.3 percent drop tied to that message on September 20, 2026.

Broadband pressure remains the issue

According to StockTwits, Armstrong said Comcast expects no turnaround in broadband subscriber erosion for the third quarter, and the report said rival fiber offers at USD 30 to USD 40 a month are adding pressure. The same report said Comcast stock fell 6.3 percent to its worst single-day drop since July.

That matters because the company also signaled only modest EBITDA growth for the third quarter, while the broader broadband backdrop remains tied to aggressive price competition, according to the same September 20, 2026 report from StockTwits.

Market value and valuation

Comcast stock traded at USD 22.74 on September 18, 2026, according to the market snapshot embedded in Perplexity Finance, with a market capitalization of USD 80.69 billion and a 1-day change of minus 0.74 percent. The same snapshot showed Comcast at 28.13 percent below its 2026 market-cap peak and listed the stock on NASDAQ.

CompaniesMarketCap also put Comcast's market capitalization at USD 80.69 billion as of September 2026, with the company ranked No. 302 globally by market value on September 18, 2026.

Revenue and earnings context

For 2025, Comcast reported revenue of USD 123.7 billion and adjusted EBITDA of USD 38.2 billion, while full-year free cash flow reached USD 13.0 billion, according to the company's annual results page on Comcast. Revenue in 2025 was up 0.2 percent from 2024, which makes broadband stability more important for the next update.

Comcast also said in that 2025 report that adjusted earnings per share rose to USD 4.53 from USD 4.45 in 2024, a modest year-over-year increase that leaves little room for a deeper connectivity slowdown.

Price stays under pressure

At USD 22.74 on September 18, 2026, Comcast stock remained well below its 2026 market-cap backdrop of USD 80.69 billion and the latest session change of minus 0.74 percent. For investors, the next test is whether broadband trends can stabilize enough to support the 2025 level of USD 38.2 billion in adjusted EBITDA.