| KnownHost, LLC | Pennsylvania |
| KnowRoaming | |
| KnowTechie, LLC | Massachusetts |
| Knowtion Health | Florida |
| Knowtion, Inc. | Ohio |
| Knox College | Illinois |
| Knox College Mathematics | Illinois |
| Knox Company | Arizona |
| Knox Systems, Inc. | |
| Knoxville College | Tennessee |
| Knoxville Linux Users Group | Tennessee |
| Knoxweb | Tennessee |
| KNS, Inc. | |
| Knubisoft | |
| Knuckleheads, Inc. | |
| Knuula | |
| KO Websites | California |
| KOA EDI | California |
| KOA Speer Electronics, Inc. | Pennsylvania |
| Koala | |
| Koality Web Solutions, Inc. | |
| Koaxis, Inc. | Pennsylvania |
| KOB Web Services, Inc. | Illinois |
| Kobara Medical, Inc. | Minnesota |
| Kobe Digital | |
| Kobescent | Indiana |
| Kobiton | Georgia |
| KochaSoft, Inc. | Michigan |
| Koda Health, Inc. | |
| KODA Kollectiv, Inc. | |
| Kodak Alaris, LLC | |
| Kodama & Co. | California |
| Koddi, Inc. | Texas |
| Kodeak Digital Marketing Experts | |
| Kodeco, Inc. | |
| Kodehash | |
| Koder360 | |
| Koderspedia | |
| Kodevent | Wyoming |
| Kodex | |
| Kodexa Labs | |
| Kodexio | Maryland |
| Kodezi, Inc. | California |
| Kodiak College | Alaska |
| Kodiak Robotics, Inc. | California |
| Kodiak Sciences, Inc. | California |
| Koding | California |
| Kodisoft | California |
| Koedal | |
| Koehlke Components, Inc. | Ohio |