| Qu Anex Corporation ( Houston, TX ) | Quad/Tech, Inc. | Quadlux, Inc. ( Fremont, CA ) |
| Qu; Yueqian ( Lanzhou, CN ) | Quad/Tech, Inc. ( Pewaukee, WI ) | Quadlux, Inc. ( Orinda, CA ) |
| Qua, Inc. ( New Rochelle, NY ) | Quad/Tech, Inc. ( Sussex, WI ) | Quadna, Inc. ( Tucson, AZ ) |
| Quabaug Corporation ( Brookfield, MA ) | Quada Internationale Ltd.( Montreal ) | Quadnovation, Inc. ( Houston, TX ) |
| Quabaug Corporation ( North Brookfield, MA ) | QUADCO EQUIPMENT INC. | Quadnovation, Inc. ( Irvine, TX ) |
| Quabaug Rubber Company ( North Brookfield, MA ) | Quadco Equipment Inc. ( Quebec, CA ) | Quadnovation, Inc. ( Irving, TX ) |
| Quabuag Corporation ( North Brookfield, MA ) | Quadco Equipment Inc. ( St-Eustache, CA ) | Quadra Indusrial Services Ontario Inc. ( Hamilton, CA ) |
| Quad Cities Automatic Pools, Inc. ( Bettendorf, IA ) | Quadic Systems, Inc. ( Gorham, ME ) | Quadra Industrial Services Ontario Inc. ( Hamilton, CA ) |
| Quad County Fire Equipment, Inc. ( Cullom, IL ) | Quadion Corporation | Quadra Logic Technologies Inc. ( Vancouver, CA ) |
| Quad Research ( Irvine, CA ) | Quadion Corporation ( Minneapolis, MN ) | Quadra Logic Technologies, Inc. ( Vancouver, CA ) |
| Quad Research ( Newport Beach, CA ) | Quadion Corporation ( Monroe, NC ) | Quadra Logic Technologies, Inc. ( Vancouver British Columbia, CA ) |
| Quad Tech ( Sussex, WI ) | Quadion Corporation ( Plymouth, MN ) | QUADRA MEDICAL S.R.L |
| Quad West, Inc. ( Valencia, CA ) | Quadivator Inc.( Manitoba ) | Quadra View Incorporated ( Tulsa, OK ) |
| Quad/Graphics Inc. ( Pewaukee, WI ) | Quadivator Inc.( Portage-la-Prairie ) | Quadra Wheelchairs, Inc. ( Westlake Village, CA ) |
| Quad/Graphics, Inc. ( Sussex, WI ) | Quadlogic Controls Corporation | Quadra, Inc. ( Sturtevant, WI ) |
| Quad/Tech Inc. ( Sussex, WI ) | Quadlogic Controls Corporation ( Long Island City, NY ) | Quadrant Bioresources Limited ( Cambridge, GB3 ) |
| Quad/Tech UK Ltd. | Quadlogic Controls Corporation ( New York, NY ) | |
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