| Red Fin Marketing, LLC | |
| Red Foundry | Illinois |
| Red Fuel Marketing Co., Inc. | Oregon |
| Red Gap Communications, Inc. | Texas |
| Red Gate Software Ltd | California |
| Red Hat Developers | |
| Red Hat, Inc. | North Carolina |
| Red Hawk Technologies | |
| Red Hill Networks, Inc. | California |
| Red Houston SEO Company | |
| red K Studio, LLC | |
| Red Key Solutions | New York |
| Red Kite Creative | Colorado |
| Red Kite Solutions, Inc. | |
| Red Lab | Iowa |
| Red Leaf Creative, LLC | |
| Red Leaf Development, LLC | |
| Red Leaf Web Design | |
| Red Letter Communications | |
| Red Lion | Pennsylvania |
| Red Lion Web Design, Inc. | New York |
| Red Maple Technologies, Inc. | Texas |
| Red Mountain Radio, LLC | Colorado |
| Red Mountain Voice and Data, Inc. | Utah |
| Red Oak Compliance Solutions | Texas |
| Red Olive | Utah |
| Red Onion | Texas |
| Red Oxygen | California |
| Red Panda Studios, LLC | California |
| Red Pixel Studios | Kentucky |
| Red Planet | New York |
| Red Queen Therapeutics, Inc. | |
| Red River | New Hampshire |
| Red River Communications | North Dakota |
| Red River Software | North Dakota |
| Red Rock Software, Inc. | Utah |
| Red Rock Technologies, Inc. | Arizona |
| Red Rock Telecommunications, Inc. | Arizona |
| Red Rocket Partners, LLC | |
| Red Rocket Web Specialists | Colorado |
| Red Rocket, Inc. | |
| Red Rover Health | |
| Red Rover Rentals | California |
| Red Sea Ventures | New York |
| Red Shark Digital | |
| Red Shift | California |
| Red Six Aerospace, Inc. | Florida |
| Red Sky Sp. z o.o. | Kentucky |
| Red Spot Design, LLC | |
| Red Storm | North Carolina |