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Investing.com -- AT&T looks like the most vulnerable U.S. carrier if SpaceX turns Starlink into a full mobile network. Still guessing which stocks will beat the market? Our AI portfolio updates monthly and is outperforming the S&P 500 by 118%. See this month's list » AT&T faces the most pressure AT&T Inc (T) has the weakest current EBITDA margin of the three at 35.7%, versus 37.4% for Verizon Communications Inc (VZ) and 37.7% for T-Mobile US Inc (TMUS). Its debt-to-EBITDA is also high at 3.5x, as of Sep 30, 2026. Why AT&T Strategic gap: T-Mobile already has a commercial satellite relationship with Starlink. That makes T-Mobile US Inc (TMUS) both a potential rival and an early beneficiary.
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