| # | Name | Location | Applications |
|---|---|---|---|
| 1. | GM Research & Development | 🇺🇸 Warren, MI, United States | 1 |
| 2. | GM ReSound A/S | 🇩🇰 Ballerup, Denmark | 1 |
| 3. | GM RUBINETTERIE S.R.L. | 🇮🇹 Oleggio Castello, Italy | 2 |
| 4. | GMR Labs, LLC | 🇺🇸 Kiln, MS, United States | 1 |
| 5. | GMR Research & Technology, Inc. | 🇺🇸 Concord, MA, United States | 4 |