Defined Benefit (Pension) · DOL Form 5500 · 2023

Alliant Energy Corporate Services Pension Plan

Data updated 2026-08-25

$232M
Total assets Near avg plan size
383
Participants Below avg headcount
95th
Percentile by assets National rank
$606,449
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, 383 participants

Alliant Energy Corporate Services's Alliant Energy Cash Balance Pension Plan reported $232M in total assets and 383 participants in its 2023 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.

  • #535 in Utilities (721 peers)

Utilities sector rank

Within Utilities, Alliant Energy Cash Balance Pension Plan ranks #535 of 721 2023 filers by assets (231% of the sector average)-$232M for 383 participants.

#535
in Utilities (721 peers)
+0.2%
assets growth YoY
2.3×
vs typical plan assets (national mean)

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 2023 · DOL Form 5500

$232,269,918 Top 5% higher than 95% of 127,068 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 2023

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

Plan-year 2023 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 (383 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Alliant Energy Cash Balance Pension Plan reported net income rose from -$95M in the plan year 2022 filing to $3M in the plan year 2023 filing.
  • Alliant Energy Cash Balance Pension Plan reported participants fell from 449 in the plan year 2022 filing to 383 in the plan year 2023 filing.
  • Alliant Energy Cash Balance Pension Plan end-of-year assets rose from $232M in the plan year 2022 filing to $232M in the plan year 2023 filing.

See the national 2022→2023 release diff →

Form 5500 schedule snapshot

Filing strip 391914946 · Alliant Energy Corporate Services PY 2023 · Defined Benefit (Pension)

Alliant Energy Cash Balance Pension Plan · $232M · 383 · 95th

  • NET $232M
  • BOOK 383
  • VS-ST 95th
  • BOY Defined Benefit (Pension)
  • SCH near Lynden Pension Equity Plan
  • EBSA ind #535

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

Laborers Local Union No. 158 Pension PlanLaborers Local Union No. 158…$233MAlliant Energy Cash Balance Pension PlanAlliant Energy Cash Balance …$232MLynden Pension Equity Plan$232MUnify Inc. Pension Plan$232MRopes & Gray LLP Supplemental Retirement Shares PlanRopes & Gray LLP Supplementa…$232M
End-of-year total assets ($M) among Alliant Energy Cash Balance Pension Plan and nearest nationwide Defined Benefit (Pension) peers. Source: DOL Form 5500 plan year 2023.

Utilities filing particulars

Total Assets (Beginning of Year)$232M
Net Assets (End of Year)$232M
Net Income$3M
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): 0.232269918 · Participants: 383Alliant Energy Cash Balance Pension PlanThe Northwestern Mutual Employee Retirement Plan, Total assets ($B): 3.298151091 · Participants: 8348The Northwestern Mutual Employee Retirement PlanBuilding Trades United Pension Trust Fund Milwaukee and Vicinity, Total assets ($B): 3.267131995 · Participants: 9960Building Trades United Pension Trust Fund Milwaukee and VicinityThe Northwestern Mutual Life Insurance Company Agents Retirement Plan, Total assets ($B): 2.08393057 · Participants: 7368The Northwestern Mutual Life Insurance Company Agents Retirement PlanHarley-Davidson Retirement Plan, Total assets ($B): 1.912240682 · Participants: 1560Harley-Davidson Retirement PlanRockwell Automation Pension Plan, Total assets ($B): 1.77661124 · Participants: 2136Rockwell Automation Pension 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 Lynden Pension Equity Plan in WA ($232M); by covered participants it is General Mills Pension Plan I in MN (383 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($232M here).

Similar participant headcount

Nearest other-state filings by covered participants (383 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. 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 2023? ▼
Alliant Energy Cash Balance Pension Plan held essentially flat - up 0.2% during 2023, from $232M to $232M. Reported net income was $3M.
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 95th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (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 Lynden Pension Equity Plan in WA ($232M, 378 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 General Mills Pension Plan I in MN (383 participants, $4.0B in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

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.