Politics and Business magazines
- Klasky Csupo, Inc.
- Klaus Steilmann GmbH & Co. KG
- Kleiner, Perkins, Caufield & Byers
- Kleinwort Benson Group Plc
- Klement's Sausage Company
- Knape & Vogt Manufacturing Company
- Knight Trading Group, Inc.
- Knight Transportation, Inc.
- Knoll Group Inc.
- Knoll, Inc.
- Knorr-Bremse AG
- Knott’s Berry Farm
- Knowledge Learning Corporation
- Knowledge Universe, Inc.
- Koala Corporation
- Kobrand Corporation
- Koç Holding A.S.
- Koç Holding As
- Koch Enterprises, Inc.
- Koenig & Bauer AG