Alliant Energy Corporate Serv. Inc. — Form 5500 filings & benefit plans
Form 5500 plan sponsor summary
According to public Form 5500 filings published through the U.S. Department of Labor (DOL) Employee Benefits Security Administration (EBSA) via the EFAST2 system, Alliant Energy Corporate Serv. Inc. (EIN 39-1914946) is a plan sponsor located in Madison, WI with 1 reported benefit plan(s) in the loaded dataset. The latest loaded Form 5500 filing year is 2023.
Company overview (based on loaded 2023 public filings)
- EIN
- 39-1914946
- Location
- Madison, WI
- Loaded plans
- 5
- Total reported participants
- 12,938
- Total reported plan assets (EOY)
- $2,358,913,352
- Plans with financial data
- 5
- Plans with provider compensation
- 4
- Latest filing year
- 2023
Totals aggregate this sponsor's loaded Form 5500 filings only and reflect figures as reported; they are not an audited company total.
Largest loaded plans by reported assets
| Plan | Plan # | Participants | Reported assets (EOY) | Year |
|---|---|---|---|---|
| Alliant Energy Corporation 401(K) Savings Plan | 005 | 4,392 | $1,321,177,371 | 2023 |
| Alliant Energy Corporation Master Retirement Trust | 100 | not reported in the loaded dataset | $729,831,016 | 2023 |
| Alliant Energy Cash Balance Pension Plan | 001 | 2,299 | $232,269,918 | 2023 |
| Alliant Energy Retiree Health & Welfare Benefit Plan | 502 | 3,314 | $71,298,169 | 2023 |
| Alliant Energy Health & Welfare Benefit Plan | 501 | 2,933 | $4,336,878 | 2023 |
Latest loaded filings
| Year | Plan | Participants | Schedules | Filing |
|---|---|---|---|---|
| 2023 | Alliant Energy Corporation Master Retirement Trust | not reported in the loaded dataset | H | 20241009141617NAL0031532576001 |
| 2023 | Alliant Energy Corporation 401(K) Savings Plan | 4,392 | H, C | 20241011011801NAL0021120161001 |
| 2023 | Alliant Energy Health & Welfare Benefit Plan | 2,933 | H, C | 20241011191938NAL0012881603002 |
| 2023 | Alliant Energy Retiree Health & Welfare Benefit Plan | 3,314 | H, C | 20241011191938NAL0012881603003 |
| 2023 | Alliant Energy Cash Balance Pension Plan | 2,299 | H, C | 20241011193946NAL0012890051001 |