Annual report
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( Mark One ) X FORM 10 - K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission File Number : 001-8610 OR Securities registered pursuant to Section 12 ( b ) of the Act : AT & T INC . Incorporated under the laws of the State of Delaware I.R.S. Employer Identification Number 43-1301883 208 S. Akard St. , Dallas , Texas , 75202 Telephone Number 210-821-4105 Title of each class Common Shares ( Par Value $ 1.00 Per Share ) Depositary Shares , each representing a 1 / 1000th interest in a share of 5.000 % Perpetual Preferred Stock , Series A Depositary Shares , each representing a 1 / 1000th interest in a share of 4.750 % Perpetual Preferred Stock , Series C AT & T Inc. 1.875 % Global Notes due December 4 , 2020 AT & T Inc. 2.650 % Global Notes due December 17 , 2021 AT & T Inc. 1.450 % Global Notes due June 1 , 2022 AT & T Inc. 2.500 % Global Notes due March 15 , 2023 AT & T Inc. 2.750 % Global Notes due May 19 , 2023 AT & T Inc. Floating Rate Global Notes due September 5 , 2023 AT & T Inc. 1.050 % Global Notes due September 5 , 2023 AT & T Inc. 1.300 % Global Notes due September 5 , 2023 AT & T Inc. 1.950 % Global Notes due September 15 , 2023 AT & T Inc. 2.400 % Global Notes due March 15 , 2024 AT & T Inc. 3.500 % Global Notes due December 17 , 2025 AT & T Inc. 0.250 % Global Notes due March 4 , 2026 to Trading Symbol ( s ) . T T PRA T PRC T 20 T 21B T22B T 23 T 23C T 23D T 23E T 23A T 23F T 24A T 25 T 26E Name of each exchange on which registered New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange