IRES has a category of nonvoting membership for companies, consultants and other individuals and organizations who wish to be involved in IRES activities and be on the Society's mailing list. Below are new additions to the roster of Sustaining Members. Click here to see the complete list.
| Abel & Lantis, P.C. | Carmel, Indiana |
| American Health & Life Insurance Co. | Fort Worth, Texas |
| Chiltington International | Hazlet, New Jersey |
| Commercial Mutual Insurance Co. | Kingston, New York |
| ECS Underwriting, Inc. | Exton, Pennsylvania |
| Hennelly & Steadman TLC | Phoenix, Arizona |
| Innovative IT Solutions | Okemos, Minnesota |
| LYNX Services, L.l.C. | North Fort Myers, Florida |
| MacNeill Group, Inc. | Sunrise, Florida |
| MAMSI (Mid Atlantic Medical Services) | Rockville, Maryland |
| Pinnacol Assurance | Denver, Colorado |
| Response Insurance | White Plains, New York |
| Selective Insurance Company of America | Branchville, New Jersey |
| Unitrin Property & Casualty Insurance Group | Dallas, Texas |
| Universal American Financial Corp. | Orlando, Florida |