Defined Benefit (Pension) · DOL Form 5500 · 2022

Alliant Energy Corporate Services Pension Plan

Data updated 2026-08-25

$232M
Total assets Near avg plan size
449
Participants Below avg headcount
96th
Percentile by assets National rank
$516,268
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 · Wisconsin · Utilities

$232M in assets, 449 participants

Alliant Energy Corporate Services's Alliant Energy Cash Balance Pension Plan reported $232M in total assets and 449 participants in its 2022 DOL Form 5500 filing, ranking in the 96th 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.

  • #556 in Utilities (738 peers)

Utilities sector rank

Within Utilities, Alliant Energy Cash Balance Pension Plan ranks #556 of 738 2022 filers by assets (232% of the sector average)-$232M for 449 participants.

#556
in Utilities (738 peers)
-29.1%
assets change YoY
2.3×
vs typical plan assets (national mean)

The plan reported a net loss of $95M 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 2022 · DOL Form 5500

$231,804,253 Top 4% higher than 96% of 139,123 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 2022

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

Plan-year 2022 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 (449 participants).

Plan-year Form 5500 strip

Filing strip 391914946 · Alliant Energy Corporate Services PY 2022 · Defined Benefit (Pension)

Alliant Energy Cash Balance Pension Plan · $232M · 449 · 96th

  • BOOK $232M
  • VS-ST 449
  • BOY 96th
  • SCH Defined Benefit (Pension)
  • EBSA near Simpson Employees Retirement Trust
  • PART ind #556

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

Seafarers Officers and Employees Pension PlanSeafarers Officers and Emplo…$232MPlumbers and Pipefitters Local Union No 333 Pension FundPlumbers and Pipefitters Loc…$232MRetirement Plan for Bargaining Unit Employees of the Metal Trades Council of Consolidated Nuclear Security, LLCRetirement Plan for Bargaini…$232MSimpson Employees Retirement TrustSimpson Employees Retirement…$232MAlliant Energy Cash Balance Pension PlanAlliant Energy Cash Balance …$232M
End-of-year total assets ($M) among Alliant Energy Cash Balance Pension Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2022.

Utilities filing particulars

Total Assets (Beginning of Year)$327M
Net Assets (End of Year)$232M
Net Income-$95M
Employer EIN391914946
Plan Effective Date1940-04-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Alliant Energy Corporate Services)

Sponsor-wide plan assets over time

All Alliant Energy Corporate Services 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): 0.231804253 · Participants: 449Alliant Energy Cash Balance Pension PlanThe Northwestern Mutual Employee Retirement Plan, Total assets ($B): 3.074208374 · Participants: 7377The Northwestern Mutual Employee Retirement PlanBuilding Trades United Pension Trust Fund Milwaukee and Vicinity, Total assets ($B): 2.951985172 · Participants: 9724Building Trades United Pension Trust Fund Milwaukee and VicinityRockwell Automation Pension Plan, Total assets ($B): 2.144532065 · Participants: 3077Rockwell Automation Pension PlanThe Northwestern Mutual Life Insurance Company Agents Retirement Plan, Total assets ($B): 1.927367772 · Participants: 7278The Northwestern Mutual Life Insurance Company Agents Retirement PlanHarley-Davidson Retirement Plan, Total assets ($B): 1.826706645 · Participants: 1744Harley-Davidson Retirement Plan
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 Simpson Employees Retirement Trust in WA ($232M); by covered participants it is Retirement Income Plan of the National Board of Medical Examiners in PA (449 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (449 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. 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 2022? ▼
Alliant Energy Cash Balance Pension Plan declined sharply - down 29.1% during 2022, from $327M to $232M. Reported net income was -$95M.
How have Alliant Energy Corporate Services plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Alliant Energy Corporate Services'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 96th percentile by end-of-year assets among 139,126 plans that reported assets for plan year 2022 (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 Simpson Employees Retirement Trust in WA ($232M, 215 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 Retirement Income Plan of the National Board of Medical Examiners in PA (449 participants, $273M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

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.