The company reported profit for the third quarter of $222 million, or 10 cents per share, little changed from the $220 million, or 10 cents per share, it reported a year earlier.
Chief rival Time Warner Inc, by contrast, showed a bigger-than-expected 80 percent jump in earnings in its quarterly report on Wednesday.
"The results are nothing to write home about," said Craig Moffett, senior analyst with Sanford C. Bernstein, who said that the rate at which customers are dropping basic cable service was a "disappointment."
While an investment loss of $104 million and the exit of 46,000 basic subscribers hurt its results, the company's quarter was bolstered by the addition of more high-speed Internet subscribers and digital phone customers. Excluding the loss, the company earned about 14 cents a share, analysts said.
The Philadelphia-based company said revenue rose from $5.1 billion to $5.6 billion, which essentially matched the $5.58 billion average that analysts polled by Reuters Estimates had expected. Earnings estimates on average called for the company to report 15 cents a share for the quarter. Comcast, which has been aiming to pull customers away from phone companies by offering high-speed Web services, added 437,000 high-speed data subscribers for a total of 8.1 million at the end of the period.