Stock ownership · SEC 13F · Q4 2025

TELEPHONE & DATA SYS INC

A breakdown of TELEPHONE & DATA SYS INC's institutional base (CUSIP 879433829): the holders, the concentration among them, and what changed last quarter.

$206K
Reported value
3
Institutions
100%
Top-5 share

The verdict

$206K of TELEPHONE & DATA SYS INC is reported by 3 institutions as of Q4 2025; ownership is held overwhelmingly by a small core of institutions.

3
institutions hold it
$206K
reported 13F value
100%
held by top 5

Based on long positions reported to the SEC as of Q4 2025; 13F omits shorts, options and non-US holdings.

How to read this page

This page summarizes how large institutional investment managers report holding this security in their quarterly SEC Form 13F-HR filings. A 13F filing is a mandatory disclosure that any manager with at least $100 million in qualifying US-listed equity assets must submit to the Securities and Exchange Commission within 45 days of the end of each calendar quarter. The figures here therefore describe long equity positions as of a specific reporting quarter, not live market quotes, and not a manager's complete book. 13F disclosures deliberately exclude short positions, cash, most derivatives, non-US listings, and small holdings, so the institutional ownership shown is a floor rather than a full picture. "Holders" counts the distinct managers reporting a position; "reported value" sums the market value those managers disclosed; and "top-5 concentration" measures how much of that reported value sits with the five largest holders. Use these numbers to understand institutional interest and how it shifts quarter over quarter, never as a recommendation to buy or sell. Every figure is rendered directly from the underlying filings and can be verified against the original documents on SEC EDGAR. This page is provided for informational purposes only and is not financial advice, consult a licensed financial advisor before making investment decisions.

Reported value

$206K

Institutional 13F value

Institutions

3

Reporting holders

Top-5 concentration

100%

Held by 5 largest

New buyers

2

Opened Q4 2025

Concentrated ownership

Top-5 holder concentration

0%100%100%
Top-5 holder concentration
Share of reported value held by the 5 largest institutions · Q4 2025
Largest institutional holders of TELEPHONE & DATA SYS INC
  1. 1
  2. 2
  3. 3

Top 3 reported holders by value · Q4 2025

Institutional ownership over time

The number of institutions reporting a TELEPHONE & DATA SYS INC position has risen from 1 to 3 over the last 7 quarters of 13F filings.

0.511.522.533.5 Q1'24Q2'24Q3'24Q1'25Q2'25Q3'25Q4'25 3
Distinct 13F filers holding TELEPHONE & DATA SYS INC, by quarter

Top Institutional Holders

# Institution Shares Value Share of reported
1 MARINER INVESTMENT GROUP LLC 5,000 $205K 99.4%
2 Bell Investment Advisors, Inc 24 $984 0.5%
3 TD Capital Management LLC 8 $328 0.2%

Latest Quarter Activity · Q4 2025

What the data says about TELEPHONE & DATA SYS INC

A handful of institutions account for most of the reported institutional float here.

  • Watch how this position’s holder count and value trend next quarter for accumulation or distribution signs. Biggest movers
  • Put TELEPHONE & DATA SYS INC in context against the broader universe of widely-held stocks. Most-held stocks
  • 13F filings omit shorts, cash and most derivatives, so know what is missing before you rely on this. 13F limitations

Informational only, not investment advice. 13F is a 45-day-lagged snapshot of long US-equity positions; holdings may have changed.

Frequently Asked Questions

How many institutions hold TELEPHONE & DATA SYS INC?
TELEPHONE & DATA SYS INC is held by 3 institutional investors per the latest SEC Form 13F filings as of Q4 2025.
What is the total institutional value of TELEPHONE & DATA SYS INC?
Institutions report $206K of TELEPHONE & DATA SYS INC as of Q4 2025.
How concentrated is ownership of TELEPHONE & DATA SYS INC?
The top five institutional holders account for 100% of the reported institutional value in TELEPHONE & DATA SYS INC, making ownership held overwhelmingly by a small core of institutions.
Who is the largest institutional holder of TELEPHONE & DATA SYS INC?
MARINER INVESTMENT GROUP LLC is the largest reported holder of TELEPHONE & DATA SYS INC with $205K across 5,000 shares as of Q4 2025.
Where does this TELEPHONE & DATA SYS INC data come from?
Every figure is rendered live from SEC Form 13F-HR filings in the EDGAR system. 13F is a mandatory quarterly disclosure of long US-listed equity positions, filed within 45 days of each quarter-end.

Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q4 2025 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Short positions and most derivatives are not disclosed.