Become a Supplier and Grow With Us

We work closely with our business partners, whether they supply us with paper and pens, parts and wire, or professional services. And the results of our partnerships - improved quality, innovative ideas, reduced costs - are profitable for all.

Use the links on this page to get information about working with us. You’ll find everything you need to become an Ameren supplier. You will also find training materials, risk compliance information, and billing instructions. To start the process of becoming an Ameren supplier, register here.

If you are already a supplier, and need more information about purchasing and general procurement, contact: Supply Chain Process & Performance
Email: ProcessPerformance@Ameren.com 

If you are a diverse supplier and would like more information about Ameren purchasing and general procurement, learn more online or call 888.985.4862.

Lien Waiver Requirements

• Ameren Lien Waiver Policy (PDF)
• Contractor's Affidavit and Partial Lien Waiver (PDF)
• Subcontractor's Partial Lien Waiver (PDF)
• Contractor's Affidavit and Final Lien Waiver (PDF)
• Subcontractor's Final Lien Waiver (PDF)
• Standard Warehouse Requirements (PDF)