| Org Name | Org Type | City | Website | AET Category |
| 21st Century Green Solutions, LLC | AET Venture | Grand Blanc, MI | 21stcenturygreensolutions.com | Wind |
| 21st Century Plastics Corp | AET Supplier | Potterville, MI | | Wind |
| 2ktool LLC | AET Supplier | Wyoming, MI | 2ktool.com | Wind |
| 3G Services Inc. | AET Supplier | Taylor, MI | http://www.3gservicesinc.com | Wind |
| A & B Machining | AET Supplier | Fruitport, MI | challengeprecision.com | Wind, Batteries/Energy Storage, CO2 Sequestration, Alternative Fuels for Power Generation |
| A J Williams Manufacturing Co | AET Supplier | Jackson, MI | NO Website Found | Wind |
| A&D Technology Inc. | AET Supplier | Ann Arbor, MI | www.aanddtech.com | Wind |
| A.B. Heller, Inc. | AET Supplier | Milford, MI | www.abheller.com | Wind |
| a.j. Veneklasen | AET Supplier | Grand Rapids, MI | ajvinc.com | Wind |
| Abb, Inc. | AET Supplier | Auburn Hills, MI | www.abb.com | Wind |
| Ability Mfg & Eng Co. | AET Supplier | Fennville, MI | www.ameco.org | Wind |
| AC Foundry Inc. | AET Supplier | Battle Creek, MI | www.acfoundry.com | Wind |
| Accio Energy, Inc. | AET Venture | Ann Arbor, MI | accioenergy.com | Wind |
| AccuBilt Inc. | AET Supplier | , MI | www.accubilt.com | Wind |
| Accurate Molding & Engineering | AET Supplier | Sparta, MI | | Wind |
| Accu-Tech Manufacturing Inc. | AET Supplier | Shelby Twp., MI | www.atmfg.com | Wind |
| Ace Controls Inc | AET Supplier | Farmington, MI | www.flairline.com | Wind |
| ACM Plastic Products Inc | AET Supplier | Sturgis, MI | | Wind |
| ACRA Inc | AET Supplier | Traverse City, MI | www.acrainc.com | Wind |
| Acrolab, Inc. USA | AET Supplier | Detroit, MI | www.acrolab.com | Wind |