Nisource 401(k) and pension plans

Nisource Inc, Merrillville, IN. EIN 35-2108964. Annual reports 2009–2025. Also filed as Columbia Energy Group; Nisource, Inc.; Nisource Inc.

Nisource Inc has 2 active retirement plans on file. The largest is the Nisource Inc Retirement Savings Plan, with 10,216 participants and $2.4 billion in assets in 2025. Fidelity has been its recordkeeper since 2009.

Active plans: 2
Participants: 13,007
Plan assets: $2.7 billion
401(k) recordkeeper: Fidelity
Plans on file: 3
Industry: Utilities

All 3 plans

Active plans first

Nisource Inc Retirement Savings Plan

401(k) with ESOPActive

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

Plan number: 005Employer EIN 35-2108964
Participants (2025): 10,216
Net assets (2025): $2.4 billion
Recordkeeper: Fidelity2009–2025
Plan administrator: Nisource Benefits Committee
801 E 86TH Ave
Merrillville, IN 46410
(219) 647-4334As filed for 2025
In effect since: September 1, 1958

Year by year, 2009 to 2025

Plan year	Participants	Net assets	Recordkeeper
2025	10,216	$2.4 billion	Fidelity
2024	10,199	$2.0 billion	Fidelity
2023	9,923	$1.7 billion	Fidelity
2022	9,945	$1.5 billion	Fidelity
2021	10,010	$1.9 billion	Fidelity
2020	10,224	$1.8 billion	Fidelity
2019	10,349	$1.6 billion	Fidelity
2018	9,996	$1.4 billion	Fidelity
2017	9,946	$1.5 billion	Fidelity
2016	9,637	$1.3 billion	Fidelity
2015	9,309	$1.2 billion	Fidelity
2014	11,303	$1.5 billion	Fidelity
2013	10,875	$1.4 billion	Fidelity
2012	10,427	$1.1 billion	Fidelity
2011	10,345	$1.0 billion	Fidelity
2010	10,058	$956 million	Fidelity
2009	10,288	$858 million	Fidelity

Columbia Energy Group Pension Plan

Cash balance pensionActive

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 001Employer EIN 35-2108964
Participants (2024): 2,791
Net assets (2024): $334 million
Administered by: Alight2009–2023
Plan administrator: Nisource Benefits Committee
801 East 86TH Avenue
Merrillville, IN 46410
(219) 647-4334As filed for 2024
In effect since: January 1, 1943

Plans merged into this one: Nisource Subsidiary Pension Plan (2012).

Earlier sponsor: Columbia Energy Group (2009–2015).

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	2,791	$334 million	not listed
2023	2,989	$364 million	Alight
2022	3,185	$372 million	not listed
2021	3,421	$532 million	not listed
2020	3,730	$593 million	not listed
2019	3,994	$560 million	not listed
2018	4,218	$505 million	not listed
2017	4,468	$586 million	not listed
2016	4,749	$562 million	not listed
2015	4,977	$483 million	not listed
2014	9,213	$937 million	not listed
2013	9,320	$911 million	not listed
2012	9,933	$869 million	not listed
2011	10,177	$844 million	not listed
2010	10,371	$808 million	not listed
2009	10,716	$698 million	Alight

Nisource Subsidiary Pension Plan

Cash balance pensionMerged

Merged. In 2012 its assets moved to the Nisource Pension Plan, sponsored by Nisource Inc (EIN 35-2108964, plan 001). Accounts moved with them, so that plan is the one to contact.

Plan number: 004Employer EIN 35-2108964
Participants (2011): 99
Net assets (2011): $12.3 million
Last listed administrator: Alight2009
Plan administrator: Nisource Benefits Committee
801 East 86TH Avenue
Merrillville, IN 46410
(219) 647-5571As filed for 2012
In effect since: January 1, 1962

Year by year, 2009 to 2012

Plan year	Participants	Net assets	Recordkeeper
2012	0	$0	not listed
2011	99	$12.3 million	not listed
2010	125	$11.8 million	not listed
2009	123	$9.7 million	Alight

If you had money in one of these plans

Call Fidelity (fidelity.com), which runs the Nisource Inc Retirement 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 ((219) 647-4334). That number was filed for 2025; ask for the benefits or retirement plan office.
If your plan was merged, your account moved with it. Follow the link on the plan to the plan it went into, and contact that one.
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.