AT&T INC.

AT&T Inc., an abbreviation of its predecessor's original name, the American Telephone and Telegraph Company, is an American multinational telecommunications holding company headquartered at the Whitacre Tower in Downtown Dallas, Texas. AT&T is the world's third-largest telecommunications company by revenue, the third-largest wireless carrier in the United States behind T-Mobile and Verizon, and the nation's largest fiber internet provider. On the New York Stock Exchange, AT&T trades under the ticker symbol "T", and has a market capitalization of $186.83 billion. On the Fortune 500 (2025) AT&T ranked 37th among the largest American businesses and reported revenues of $125.6 billion last year. [3]

AT&T has over 240 million subscribers worldwide, and its operations are split into two main segments: Communications, which offers wireless services, broadband options, and business solutions, along with Latin America, which provides wireless networking in Mexico. Even after spinning off DirecTV, AT&T still offers bundling deals with it. While AT&T traces its history to the original company founded in 1885, the modern version began on January 1, 1984, as Southwestern Bell Corporation (SBC Communications) after the Bell System breakup. The original AT&T was created by American Bell Telephone on March 5, 1885, as a long-distance subsidiary, and later merged with its corporate parent in 1889. Over time, AT&T developed a natural monopoly in telephony, dominating telecommunications for much of the 20th century and earning the nickname "Ma Bell". [3]

The U.S. Department of Justice filed an antitrust lawsuit against AT&T under the Sherman Antitrust Act, arguing it held unfair advantages over other telecom companies through the Bell System. Despite fighting the case, AT&T settled in 1982 to break up the Bell System into seven independent companies. AT&T was allowed to retain its long-lines and technology divisions and it ventured into new industries. SBC, which originated from ADT Inc., was the smallest "Baby Bell" and it grew by acquiring Pacific Telesis and Ameritech. AT&T later spun off Lucent Technologies along with its wireless and broadband units, leading to an uncertain future. In 2005, SBC Communications bought AT&T Corporation and adopted its branding to become the modern AT&T. [3]

Background text: Wikipedia contributors, AT&T. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.

The Wikidata background record identifies John Stankey in the chief-executive role. This background entry is not an official confirmation of the current board or executive roster. [2]

Employees: 202,600 · reported year 2021. [2]

Annual revenue: USD 122,336,000,000 · reported year 2024. [2]

The SEC submissions record gives AT&T INC. a fiscal year end of 1231 (MMDD). Individual filings below identify their own reporting period; the filing date is the publication event, not the financial year end. [1]

Listed securities: T (NYSE), TBB (NYSE), T-PA (NYSE), T-PC (NYSE). Multiple symbols may represent different share classes or securities of the same registrant. [4]

1. 2026-02-09

   Form 10-K filed; reporting period ends 2025-12-31. [5]

Annual, quarterly and current reports from the collected SEC record. Insider Forms 4 and 144 are excluded. This is a selected list, not a live filing feed.

Comparison candidates share the SEC SIC classification 4813. This does not imply ownership, partnership or trading relationships.

2 verified direct relationships. Industry peers are not relationship edges.

1. SEC — AT&T INC. filing identity and securities ↗
2. Wikidata — company background record (CC0) ↗
3. Wikipedia contributors — AT&T (CC BY-SA 4.0) ↗
4. SEC securities directory ↗
5. Company chronology / filing ↗

Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.