Contact information
Contact information for medical providers, pension vendors, shareowners and more.
Retirees of all ages
Pension information
Your Pension Care Team
eepoint.towerswatson.com/sites/alliant/ess
For pensions through Principal Financial
1-800-247-7011
401(k)
Shareowner Services
1-800-353-1089 or (608) 458-3974
Fax: (608) 458-3321
Alliant Energy Shareowner Services
4902 N. Biltmore Lane
Madison, WI 53718-2148
Alliant Energy Foundation
Alliant Energy Human Resources
Use our online form
Retirees over 65
Via Benefits
HRA Medical Supplement
1-866-249-7784
Retirees under 65
Retirees under 65 health and prescription drug
Health Reimbursement Account
Optum Financial
1-844-881-0130
Dental insurance
Delta Dental of Wisconsin
1-800-236-3712