Defined Benefit (Pension) · DOL Form 5500 · 2024

Alliant Energy Corporate Services Inc Pension Plan

Data updated 2026-08-25

$226M
Total assets Near avg plan size
356
Participants Below avg headcount
95th
Percentile by assets National rank
$634,418
Avg per participant High balance/head
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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.

  • #526 in Utilities (732 peers)

Utilities sector rank

Within Utilities, Alliant Energy Cash Balance Pension Plan ranks #526 of 732 2024 filers by assets (238% of the sector average)-$226M for 356 participants.

#526
in Utilities (732 peers)
-2.8%
assets change YoY
2.3×
vs typical plan assets (national mean)

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.

Alliant Energy Cash Balance Pension Plan's outsized position by total assets

Alliant Energy Cash Balance Pension Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$225,852,641 Top 5% higher than 95% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Alliant Energy Cash Balance Pension Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Alliant Energy Cash Balance Pension Plan sits mid-pack in the medium band (356 participants).

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.

See the national 2023→2024 release diff →

Plan-year Form 5500 strip

Filing strip 391914946 · Alliant Energy Corporate Services Inc PY 2024 · Defined Benefit (Pension)

Alliant Energy Cash Balance Pension Plan · $226M · 356 · 95th

  • EIN $226M
  • EIN 356
  • EIN 95th
  • EIN Defined Benefit (Pension)
  • EIN near Energizer Holdings, Inc. Retirement Plan
  • EIN ind #526

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Utilities retirement plans → · Plans in Wisconsin →

Alliant Energy Cash Balance Pension Plan in the asset neighbourhood

The Phila Bakery Employers & Food Driver Salesmens Union Local #463 & Teamsters Local #676 Pension PlThe Phila Bakery Employers &…$227MAlliant Energy Cash Balance Pension PlanAlliant Energy Cash Balance …$226MEnergizer Holdings, Inc. Retirement PlanEnergizer Holdings, Inc. Ret…$226MRetirement Plan of San Jose Water CompanyRetirement Plan of San Jose …$226MSg Pension Plan$226M
End-of-year total assets ($M) among Alliant Energy Cash Balance Pension Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2024.

Utilities filing particulars

Total Assets (Beginning of Year)$232M
Net Assets (End of Year)$226M
Net Income-$4M
Employer EIN391914946
Plan Effective Date1940-04-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Alliant Energy Corporate Services Inc)

Sponsor-wide plan assets over time

All Alliant Energy Corporate Services Inc plans reported in each filing year

Latest sponsor-wide plan assets
$1.6B 16.956327726571477% vs 2022
2024 filing year
$1.3B$1.4B$1.5B$1.6B$1.7B 202220232024 $1.4B $1.63B ▲ +16.4%
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 Scatter plot of 6 data points. -5000050001000015000 01234 Total assets ($B) Participants Alliant Energy Cash Balance Pension Plan, Total assets ($B): 0.225852641 · Participants: 356Alliant Energy Cash Balance Pension PlanBuilding Trades United Pension Trust Fund Milwaukee and Vicinity, Total assets ($B): 3.531588718 · Participants: 10236Building Trades United Pension Trust Fund Milwaukee and VicinityThe Northwestern Mutual Employee Retirement Plan, Total assets ($B): 3.254287792 · Participants: 8254The Northwestern Mutual Employee Retirement PlanThe Northwestern Mutual Life Insurance Company Agents Retirement Plan, Total assets ($B): 2.075823689 · Participants: 7653The Northwestern Mutual Life Insurance Company Agents Retirement PlanHarley-Davidson Retirement Plan, Total assets ($B): 1.851962731 · Participants: 1414Harley-Davidson Retirement PlanNorth Central States Regional Council of Carpenters Pension Fund, Total assets ($B): 1.83166949 · Participants: 5105North Central States Regional Council of Carpenters Pension Fund
Alliant Energy Cash Balance Pension Plan vs. nearby Defined Benefit (Pension) plans in Wisconsin, assets vs. participants
Compare Alliant Energy Cash Balance Pension Plan side-by-side with 3 peers →

Alliant Energy Cash Balance Pension Plan's out-of-state Defined Benefit (Pension) peers by assets and headcount

Outside Wisconsin, the nearest Defined Benefit (Pension) by assets is Energizer Holdings, Inc. Retirement Plan in MO ($226M); by covered participants it is Mary Washington Healthcare Defined Benefit Retirement Plan in VA (355 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (356 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Alliant Energy Cash Balance Pension Plan assets move in 2024? ▼
Alliant Energy Cash Balance Pension Plan edged down modestly - down 2.8% during 2024, from $232M to $226M. Reported net income was -$4M.
How have Alliant Energy Corporate Services Inc plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Alliant Energy Corporate Services Inc's sponsor-wide assets grew 17.0%, from $1.4B to $1.6B.
Where does Alliant Energy Cash Balance Pension Plan rank by assets among Form 5500 filers? ▼
Alliant Energy Cash Balance Pension Plan ranks in the 95th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 5% of all filed plans by assets).
Which Defined Benefit (Pension) plans are similar in size to Alliant Energy Cash Balance Pension Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by assets is Energizer Holdings, Inc. Retirement Plan in MO ($226M, 361 participants).
Which Defined Benefit (Pension) plans cover a similar participant headcount to Alliant Energy Cash Balance Pension Plan? ▼
Among Defined Benefit (Pension) plans in other states, the closest by covered participants is Mary Washington Healthcare Defined Benefit Retirement Plan in VA (355 participants, $128M in assets).

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.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.