Find an old Alliant Energy Corporate Services 401(k)
Alliant Energy Corporation 401(k) Savings Plan
Alliant Energy Corporate Services, Inc. · Plan 005 · EIN 39-1914946 · Madison, WI
| Plan administrator | Benefit Plans Committee of Alliant Energy Corporation 4902 North Biltmore Lane, Madison, WI 53718-2148 | Form 5500 ↗ |
| Recordkeeper (who holds the accounts) | Empower Annuity Ins Co of America | Schedule C ↗ |
| Former employees with balances | 1,139 separated participants still had money in the plan | Form 5500 ↗ |
Alliant Energy Cash Balance Pension Plan
Alliant Energy Corporate Services Inc · Plan 001 · EIN 39-1914946 · Madison, WI
| Plan administrator | Alliant Energy Corporate Services Inc 4902 N. Biltmore Lane, Suite 1000, Madison, WI 53718-2148 | Form 5500 ↗ |
| Recordkeeper (who holds the accounts) | Not listed on Schedule C (small plans often don't file one) | |
| Former employees with balances | 363 separated participants still had money in the plan | Form 5500 ↗ |
Alliant Energy Corporate Services 401(k) match, vesting and fees →
Found it? Your options
| Leave it | Often allowed if your balance is over $7,000. You keep the plan's investments and fees. |
| Move it to your new job's plan | If the new plan accepts roll-ins. Ask the new plan's recordkeeper. |
| Roll it into an IRA | More investment choices, and you control it. A direct rollover avoids withholding and penalties. |
| Cash out | Usually taxed, plus a 10% penalty if you are under 59½. |
General information, not financial or tax advice. Rules depend on your plan and situation.
How to track down the account
- Call the plan administrator or recordkeeper listed on the filing. Have your name, Social Security number and dates of employment ready.
- If the plan terminated, ask the administrator where balances went (another plan, an IRA provider, or a state unclaimed-property office).
- Over 65? Also check the Department of Labor's Retirement Savings Lost and Found database.
Common questions
How do I find my old Alliant Energy Corporate Services 401(k)?
Contact the plan administrator listed on the plan's Form 5500 filing: Benefit Plans Committee of Alliant Energy Corporation, (608) 458-3311. The accounts are held by the recordkeeper, Empower Annuity Ins Co of America. Have your Social Security number and dates of employment ready.
What is the Alliant Energy Corporate Services 401(k) phone number?
The plan administrator phone number on the plan year 2024 filing is (608) 458-3311.
Contacts are as filed on each plan's latest Form 5500 and may be out of date. PlanFacts is not affiliated with Alliant Energy Corporate Services and does not hold accounts. Not financial advice. Report a correction