Telephone and Data Systems

Telephone and Data Systems, Inc. (TDS) is an American telecommunications holding company established in 1969 from a group of rural telephone companies in Wisconsin. The company developed around the ownership and operation of communications businesses serving markets that were often smaller, less densely populated, or less attractive to the largest national operators. Its activities have included traditional telephone service, broadband access, cable operations, wireless communications, radio-tower leasing, managed information-technology services, and regional data-center services. TDS has historically conducted much of its operating activity through subsidiaries rather than under a single consumer-facing TDS product portfolio. TDS Telecom has represented the company’s wireline and broadband operations, including telephone and internet services in regional and rural communities. The company also created U.S. Cellular in 1983 as a wireless subsidiary. U.S. Cellular became a separately traded company while remaining controlled by TDS, and for many years served as TDS’s principal wireless platform. The group has also used acquisitions and portfolio management to broaden or reshape its communications activities. In 2001, TDS acquired Straus Printing Company and combined it with the previously acquired Suttle Press to create Suttle-Straus, adding commercial printing to its collection of operating businesses. The company later owned OneNeck, a managed-services and regional data-center business, before selling it to US Signal, a portfolio company of Igneo Infrastructure Partners, in 2024. A major structural change occurred in 2025. United States Cellular Corporation sold its cellular and wireless business, together with a substantial portion of its radio-spectrum rights, to T-Mobile USA. U.S. Cellular retained ownership of approximately 4,400 radio towers, and T-Mobile agreed to lease at least 2,600 of those towers for 15 years. In connection with the transaction, United States Cellular changed its corporate name to Array Digital Infrastructure, Inc. and changed its public ticker from USM to AD. TDS retained an 81 percent ownership interest in Array. This transaction shifted the former U.S. Cellular business from an integrated wireless operator toward a communications-infrastructure company centered on tower assets and leasing. TDS remains a publicly traded company listed on the New York Stock Exchange under the symbol TDS. Its identity is rooted in long-term ownership of regional communications assets, with a particular emphasis on broadband, wireline services, wireless-related infrastructure, and communities outside the largest metropolitan markets. The group’s business mix has changed over time as it has entered, acquired, reorganized, and exited individual operating sectors.

Telephone and Data Systems began in 1969 as a group of rural telephone companies in Wisconsin. Its initial business model was based on owning and operating local communications systems in communities that were generally outside the largest urban markets. This regional orientation became a defining feature of the company and shaped its later expansion into broadband, cable, wireless, and related communications infrastructure. In 1983, TDS established U.S. Cellular as a subsidiary to develop a wireless communications business. U.S. Cellular eventually became a separately traded corporation, but TDS remained its controlling shareholder. The wireless subsidiary gave the broader group exposure to the growth of cellular communications while TDS Telecom continued to represent the company’s wireline and broadband activities. Across these businesses, TDS maintained a portfolio structure in which distinct subsidiaries operated different communications services and geographic markets. TDS also expanded beyond telecommunications. In 2001, it acquired Straus Printing Company and combined it with Suttle Press, another printing business it had previously acquired, to create Suttle-Straus. This move illustrated the company’s willingness to maintain operating businesses adjacent to, but not limited to, core telephone and network services. Later portfolio activity included OneNeck, a managed-services and regional data-center company. TDS sold OneNeck to US Signal, a portfolio company of Igneo Infrastructure Partners, in 2024. The company’s wireless structure changed substantially in 2025. United States Cellular sold its cellular and wireless business, along with much of its radio-spectrum rights, to T-Mobile USA. Rather than exiting the communications sector entirely, the former wireless subsidiary retained approximately 4,400 radio towers. T-Mobile agreed to remain a tenant on at least 2,600 of those towers under 15-year leases. United States Cellular simultaneously changed its name to Array Digital Infrastructure, Inc. and changed its public trading symbol from USM to AD. TDS retained an 81 percent ownership position in Array. This reorganization transformed a major part of TDS’s historical portfolio. The former U.S. Cellular business had been associated principally with the operation of a regional wireless network; Array Digital Infrastructure instead represents an infrastructure-oriented model based on tower ownership and leasing. TDS therefore continues to combine operating communications services, particularly through TDS Telecom, with ownership interests in communications infrastructure. TDS founder LeRoy T. Carlson died in May 2016 at the age of 100. The company remains publicly traded on the New York Stock Exchange under the ticker TDS. Its historical development reflects the evolution of American communications markets from rural fixed-line telephone systems to broadband, cellular networks, managed digital services, and specialized infrastructure assets.

1. 2025U.S. Cellular transitions to Array Digital Infrastructure

   U.S. Cellular sells its wireless business and much of its spectrum to T-Mobile, retains approximately 4,400 towers, adopts the Array Digital Infrastructure name, and changes its ticker to AD.

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2. 2024OneNeck is sold

   TDS sells OneNeck, its managed-services and regional data-center business, to US Signal.

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3. 2016Founder LeRoy T. Carlson dies

   LeRoy T. Carlson, the founder of TDS, dies in May at the age of 100.

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4. 2001Suttle-Straus is formed

   TDS combines Straus Printing Company with the previously acquired Suttle Press to form Suttle-Straus.

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5. 1983U.S. Cellular is founded

   TDS creates U.S. Cellular as a subsidiary to pursue wireless communications.

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6. 1969Telephone and Data Systems is established

   TDS begins as a group of rural telephone companies in Wisconsin.

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A regional and middle-market communications holding company focused on broadband, wireline, wireless-related assets, and infrastructure serving rural and smaller United States communities.

• TDS TelecomWireline and broadband telecommunications

  TDS Telecom is the group’s principal wireline communications business. It represents TDS’s traditional telephone operations and its broadband and related regional communications services. The business reflects the company’s long-standing focus on rural and smaller United States communities, where local network ownership and service delivery have been central to TDS’s operating model.

• UScellularWireless communications1983

  UScellular was created by TDS in 1983 as a wireless subsidiary and became a separately traded company while remaining controlled by TDS. It developed and operated cellular services in regional United States markets. In 2025, the cellular and wireless business and much of its spectrum were sold to T-Mobile USA, marking the end of the operating wireless business under the U.S. Cellular identity.

• Array Digital InfrastructureWireless infrastructure2025

  Array Digital Infrastructure is the post-2025 corporate successor to United States Cellular Corporation. After the sale of the wireless business to T-Mobile, Array retained approximately 4,400 radio towers and continued as a publicly traded infrastructure company. T-Mobile agreed to lease at least 2,600 of those towers for 15 years, while TDS retained an 81 percent ownership interest.

• OneNeckManaged services and regional data centers

  OneNeck was a TDS business providing managed services and regional data-center capabilities. TDS divested the business in 2024 by selling it to US Signal, a portfolio company of Igneo Infrastructure Partners.

• Suttle-StrausCommercial printing2001

  Suttle-Straus was formed in 2001 through the combination of Straus Printing Company and the previously acquired Suttle Press. It represented a non-telecommunications operating business within TDS’s historical portfolio.

• 2025Transfer the U.S. Cellular wireless business to T-MobileM&A

  TDS and its controlled wireless subsidiary reorganized the former U.S. Cellular business around the value of its network infrastructure and spectrum assets.

  What changed. United States Cellular sold its cellular and wireless business and much of its radio-spectrum rights to T-Mobile USA, while retaining approximately 4,400 radio towers.

  Aftermath. United States Cellular changed its name to Array Digital Infrastructure, changed its ticker from USM to AD, and entered into tower-leasing arrangements under which T-Mobile agreed to remain a tenant on at least 2,600 towers for 15 years. TDS retained 81 percent ownership of Array.

  • T-Mobile USA — T-Mobile acquired the wireless operations and spectrum and agreed to lease a substantial portion of the retained tower portfolio.
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• 2024Sell OneNeckM&A

  TDS reviewed its portfolio of communications and technology-related businesses.

  What changed. TDS sold OneNeck to US Signal, a portfolio company of Igneo Infrastructure Partners.

  Aftermath. TDS exited ownership of the managed-services and regional data-center business.

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• 2001Combine the printing businesses into Suttle-StrausM&A

  TDS had acquired Straus Printing Company and previously acquired Suttle Press as part of a broader portfolio of operating businesses.

  What changed. The two printing operations were combined to create Suttle-Straus.

  Aftermath. Suttle-Straus became another subsidiary within the TDS group.

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• 1983Create a dedicated wireless subsidiaryStrategy

  TDS sought to participate in the developing cellular communications market while retaining its established regional telephone operations.

  What changed. The company founded U.S. Cellular as a subsidiary.

  Aftermath. U.S. Cellular became TDS’s principal wireless platform and later operated as a separately traded company under TDS control.

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• 2025U.S. Cellular transfers wireless business to T-Mobile and becomes Array Digital Infrastructure

  United States Cellular Corporation sold its cellular and wireless operations and much of its spectrum rights to T-Mobile USA. It retained approximately 4,400 radio towers, adopted the name Array Digital Infrastructure, changed its ticker from USM to AD, and remained 81 percent owned by TDS.

  M&ALeadership change
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• 2024TDS sells OneNeck managed-services and data-center business to US Signal

  Telephone and Data Systems sold OneNeck, a managed-services and regional data-center company, to US Signal, a portfolio company of Igneo Infrastructure Partners.

  M&A
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1. Telephone and Data Systems
2. Telephone and Data Systems official website