Telephone and Data Systems 401(k) and retirement plans

Telephone and Data Systems, Inc., Madison, WI. EIN 36-2669023. Annual reports 2009–2025.

Telephone and Data Systems, Inc. has 2 active retirement plans on file. The largest is the Telephone and Data Systems, Inc. Tax-Deferred Savings Plan, with 12,108 participants and $1.6 billion in assets in 2025. Aon has been its recordkeeper since 2015. No traditional pension plan appears in Telephone and Data Systems's filings since 2009.

Active plans: 2
Participants: 18,438
Plan assets: $2.0 billion
401(k) recordkeeper: Aon
Plans on file: 2
Industry: Information and media

All 2 plans

Active plans first

Telephone and Data Systems, Inc. Tax-Deferred Savings Plan

401(k)Active

Active. The plan filed its annual report for the 2025 plan year.

Plan number: 003Employer EIN 36-2669023
Participants (2025): 12,108
Net assets (2025): $1.6 billion
Recordkeeper: AonEarlier: Alight (2009)
Plan administrator: Telephone and Data Systems, Inc.
525 Junction Road
Madison, WI 53717
(608) 664-8300As filed for 2025
In effect since: December 1, 1985

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	12,108	$1.6 billion	Aon
2024	14,525	$1.8 billion	Aon
2023	15,053	$1.6 billion	Aon
2022	15,022	$1.4 billion	Aon
2021	14,097	$1.6 billion	Aon
2020	13,945	$1.4 billion	Aon
2019	13,932	$1.2 billion	Aon
2018	13,873	$999 million	Aon
2017	14,055	$1.0 billion	Aon
2016	14,200	$888 million	Aon
2015	14,002	$791 million	Aon
2014	14,211	$784 million	not listed
2013	13,933	$731 million	not listed
2012	14,710	$608 million	not listed
2011	14,820	$517 million	not listed
2010	16,723	$496 million	not listed
2009	16,107	$418 million	Alight

Telephone and Data Systems, Inc. Pension Plan

Money purchase pensionActive

Active. The plan filed its annual report for the 2025 plan year.

Plan number: 008Employer EIN 36-2669023
Participants (2025): 6,330
Net assets (2025): $459 million
Recordkeeper: Aon2015–2025
Plan administrator: Telephone and Data Systems, Inc.
525 Junction Road
Madison, WI 53717
(608) 664-8300As filed for 2025
In effect since: January 1, 1994

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	6,330	$459 million	Aon
2024	8,192	$509 million	Aon
2023	8,628	$471 million	Aon
2022	8,550	$414 million	Aon
2021	8,660	$491 million	Aon
2020	9,103	$443 million	Aon
2019	12,525	$394 million	Aon
2018	9,410	$333 million	Aon
2017	9,041	$366 million	Aon
2016	9,775	$324 million	Aon
2015	9,773	$299 million	Aon
2014	9,916	$305 million	not listed
2013	8,573	$297 million	not listed
2012	9,647	$265 million	not listed
2011	11,821	$233 million	not listed
2010	13,128	$234 million	not listed
2009	12,711	$207 million	not listed

If you had money in one of these plans

Call Aon, which runs the Telephone and Data Systems, Inc. Tax-Deferred Savings Plan. With your Social Security number and the plan name, it can tell you whether you still have a balance and, if not, where it went.
Or call the plan administrator listed on the plan below ((608) 664-8300). That number was filed for 2025; ask for the benefits or retirement plan office.
Still stuck? The Department of Labor's benefits advisers help for free: askebsa.dol.gov or 1-866-444-3272. Never pay anyone to find your own money.

What these numbers are

They come from the Form 5500 annual reports each plan files with the Department of Labor, as the plan filed them. A plan year is usually a calendar year.
Participants counts everyone in the plan at year end: current employees, former employees who still have a balance or a pension coming, and retirees or beneficiaries being paid.
The recordkeeper is the service provider whose Schedule C entry says it keeps the plan's records. Small plans do not file Schedule C, so some plans show none.
We cannot see anyone's account. Only the plan or its recordkeeper can tell you your balance.

Sources: U.S. Department of Labor, Form 5500 datasets and PBGC trusteed plans. How we read them.

All 2 plans

Telephone and Data Systems, Inc. Tax-Deferred Savings Plan

Telephone and Data Systems, Inc. Pension Plan

If you had money in one of these plans

What these numbers are

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