Defined Benefit (Pension) · DOL Form 5500 · 2024
Alliant Energy Corporate Services Inc Pension Plan
Data updated 2026-08-06
- $226M
- Total assets
- 356
- Participants
- 95th
- Percentile by assets
- $634,418
- Avg per participant
Official DOL plan name: Alliant Energy Cash Balance Pension Plan · Sponsored by Alliant Energy Corporate Services Inc · Wisconsin · Utilities
$226M in assets, 356 participants
Alliant Energy Corporate Services Inc's Alliant Energy Cash Balance Pension Plan reported $226M in total assets and 356 participants in its 2024 DOL Form 5500 filing, ranking in the 95th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.
- 95th percentile by assets (of 116,472 plans)
Utilities sector rank
Within Utilities, Alliant Energy Cash Balance Pension Plan ranks #506 of 707 2024 filers by assets (242% of the sector average)-$226M for 356 participants.
- $226M
- total plan assets (2024 EOY)
- 356
- covered participants
- 95th
- percentile by assets (of 116,472 plans)
- $634,418
- avg assets per participant
The plan reported a net loss of $4M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
What changed between DOL Form 5500 filings
plan year 2023 → plan year 2024
- Alliant Energy Cash Balance Pension Plan reported net income fell from $3M in the plan year 2023 filing to -$4M in the plan year 2024 filing.
- Alliant Energy Cash Balance Pension Plan reported participants fell from 383 in the plan year 2023 filing to 356 in the plan year 2024 filing.
- Alliant Energy Cash Balance Pension Plan end-of-year assets fell from $232M in the plan year 2023 filing to $226M in the plan year 2024 filing.
Rank #506 in Utilities
Among 707 Utilities plans that filed a Form 5500 for plan year 2024, Alliant Energy Cash Balance Pension Plan ranks #506 by end-of-year assets - about 242% of the sector average of $547M. Nationally it sits in the 95th percentile, a weaker position within its industry than across all filers.
Utilities filing particulars
| Total Assets (Beginning of Year) | $232M |
|---|---|
| Net Assets (End of Year) | $226M |
| Net Income | -$4M |
| Employer EIN | 391914946 |
| Plan Effective Date | 1940-04-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Alliant Energy Corporate Services Inc)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 2 | 3,712 | $1.4B |
| 2023 | 2 | 3,484 | $1.6B |
| 2024 | 2 | 3,621 | $1.6B |
Nearby Defined Benefit (Pension) Plans in Wisconsin
Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.
Alliant Energy Cash Balance Pension Plan vs. nearby Defined Benefit (Pension) plans in Wisconsin, assets vs. participants
- Building Trades United Pension Trust Fund Milwaukee and Vicinity $3.5B · 10,236
- The Northwestern Mutual Employee Retirement Plan $3.3B · 8,254
- The Northwestern Mutual Life Insurance Company Agents Retirement Plan $2.1B · 7,653
- Harley-Davidson Retirement Plan $1.9B · 1,414
- North Central States Regional Council of Carpenters Pension Fund $1.8B · 5,105
Similar-Sized Defined Benefit (Pension) Plans Nationally
Defined Benefit (Pension) plans in other states closest to Alliant Energy Cash Balance Pension Plan by total assets, not by location.
- Retirement Plan of San Jose Water Company (CA) $226M · 500
- Sg Pension Plan (NY) $226M · 414
- Gatx Corporation Noncontributory Pension Plan for Salaried Employees (IL) $227M · 583
- Alstom Transportation Retirement Plan (PA) $224M · 924
Frequently Asked Questions
How did Alliant Energy Cash Balance Pension Plan assets move in 2024? ▼
How have Alliant Energy Corporate Services Inc plan assets changed over time? ▼
Where does Alliant Energy Cash Balance Pension Plan rank by assets among Form 5500 filers? ▼
Which Defined Benefit (Pension) plans are similar in size to Alliant Energy Cash Balance Pension Plan? ▼
Next read for Alliant Energy Cash Balance Pension Plan
Filing takeaways
Ways to act on Alliant Energy Cash Balance Pension Plan's numbers.
- By total assets, Alliant Energy Cash Balance Pension Plan ranks in the top 5% of all filed plans by assets. See the largest plans
- Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in Wisconsin. Compare plans
- Alliant Energy Corporate Services Inc's sponsor-wide assets have grown 17.0% since 2022 across 3 plan years on file. More Utilities plans
Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.
Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 391914946.
Read our methodology - how this data is sourced, computed, and verified.