CMCSA vs TMUS

Comcast and T-Mobile US, Inc., both Communication Services

T-Mobile US, Inc. is the larger company at $197B against $80B. On trailing earnings CMCSA is the cheaper of the two at a P/E of 8.8 against 18.8, a gap that is only a bargain if the two are growing at similar rates. Over the past year CMCSA returned -6.7% against -23% for TMUS.

Comcast and T-Mobile US, Inc.compared on valuation, return and Ryufin’s Smart Score
FigureCMCSATMUS
Last close$27.20$180
Market cap$80B$197B
Trailing P/Elower is cheaper for the same earnings, not automatically better8.818.8
Dividend yield4.9%2.1%
1-year return-6.7%-23%
5-year return-43%+30%
Ryufin Smart Scoresector-relative, 1–109/109/10

Figures from SEC filings and end-of-day closes. Highlighting marks the higher or lower number, which is not the same as the better investment, a low P/E can be a warning and a high one can be deserved.

Comcast

Revenue of $30B in Q2 2026, net income $3.5B. Its largest reported line is Domestic Broadband, 25% of the disclosed total.

T-Mobile US, Inc.

Revenue of $23B in Q2 2026, net income $3.2B. Its largest reported line is Branded Postpaid, 68% of the disclosed total.

Open these two in the interactive comparison to add more names, change the period or read the correlation.