TDS SCHEDULE 13D/A: SEC filing

The Trustees of the Voting Trust of Telephone and Data Systems

Filed with the SEC on · accession 0000913115-26-000012

TDS filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Sep 2, 2026. The Trustees of the Voting Trust of Telephone and Data Systems filed a Schedule 13D/A joint filing agreement, disclosing beneficial ownership of TDS common shares by the Carlson family trustees. The stock moved +6.7% by the first close after the filing.

Summary of the filing

The Trustees of the Voting Trust of Telephone and Data Systems filed a Schedule 13D/A joint filing agreement, disclosing beneficial ownership of TDS common shares by the Carlson family trustees. Each trustee beneficially owns less than 1% of the class outside the Voting Trust, with additional shares held in the Voting Trust for family members.

Key details

TDS Common Shares beneficially owned by Walter C. D. Carlson$258K
TDS Common Shares beneficially owned by Letitia G. Carlson, M.D.$224K
TDS Common Shares beneficially owned by Prudence E. Carlson$527K
TDS Common Shares beneficially owned by Anthony J. M. Carlson$33K
IssuerTelephone and Data Systems, Inc.
Company where trustee anthony j. m. carlson serves as president and ceoArray Digital Infrastructure, Inc.
Trustee; president and ceo of telephone and data systems, inc.Walter C. D. Carlson
Trustee; physician and clinical professorLetitia G. Carlson, M.D.
Trustee; private investorPrudence E. Carlson
Trustee; president and ceo of array digital infrastructure, inc.Anthony J. M. Carlson

How TDS stock reacted

Close before

$33.62

Sep 1, 2026

First close after

+6.69%

$35.87

5 trading days

+12.70%

$37.89

Since filing

-2.23%

$32.87

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Frequently asked questions

What did TDS file with the SEC on Sep 2, 2026?

TDS filed a SCHEDULE 13D/A (SEC filing). The Trustees of the Voting Trust of Telephone and Data Systems filed a Schedule 13D/A joint filing agreement, disclosing beneficial ownership of TDS common shares by the Carlson family trustees. Each trustee beneficially owns less than 1% of the class outside the Voting Trust, with additional shares held in the Voting Trust for family members.

How do I read a SCHEDULE 13D/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13D/A (schedule 13d/a): A report the company filed with the SEC (the US market regulator).

How did TDS stock react to this filing?

TDS closed at $33.62 before the filing and $35.87 on Sep 2, 2026 (+6.69%). Five trading days later: $37.89 (+12.70%).

Other TDS SEC filings

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