| Watchmaker Genomics | |
| Watchtower Security | |
| Water Dancer Designs | California |
| Water Hero, Inc. | |
| Water Lens, LLC | |
| Water Research Foundation | |
| WaterBridge Operating, LLC | Texas |
| WaterEquity, LLC | |
| Waterfield Tech | |
| Waterfield Technologies | Oklahoma |
| Waterford Design Technologies | Wisconsin |
| Waterford Technologies | California |
| Waterfront Graphic Design, LLC | |
| Waterlily | California |
| Waterline Ventures | Massachusetts |
| Waterly, Inc. | |
| Waterman Engineering & Consulting, LLC | Maryland |
| Watermark | Texas |
| Watermark Advisors, LLC | |
| WaterMark Design | North Dakota |
| Watermark Media, LLC | Pennsylvania |
| Watermark Venture Capital | California |
| Watermark, Inc. | |
| Watermelon Mountain Web Marketing | New Mexico |
| Watermelon Web Works | |
| Waters Corporation | |
| Waterscape Tech, LLC | South Carolina |
| Watershed Informatics | Massachusetts |
| Watershed Technology, Inc. | California |
| Waterwheel Software, Inc. | California |
| WATRONIX, Inc. | California |
| Watson Creative | |
| Watson Industries, Inc. | Wisconsin |
| Watson Institute | Colorado |
| Watt Media | |
| Watt Media, Inc. | Florida |
| Wattle Sol | Wyoming |
| Watts Battery | |
| Wattvision.com | New Jersey |
| Waud Capital | Illinois |
| Waukesha County Technical College | Wisconsin |
| WAV, Inc. | Illinois |
| Wave | California |
| Wave Communications, Inc. | Wisconsin |
| Wave Computation Technologies, Inc. | North Carolina |
| Wave Computing | California |
| Wave Corporation | Florida |
| Wave Equity Partners | |
| Wave Interactive | |
| Wave Internet | Florida |