- K-Fed Bancorp
- K-Swiss Incorporated
- Kaiser Aluminum Corporation
- Kaman Corporation
- KB Home
- Kelley Blue Book LLC
- Kellogg Company
- Kelly Services Incorporated
- Kenneth Cole Productions Incorporated
- Key Technology Incorporated
- Keynote Systems Incorporated
- Keyspan
- Kia Motors Corp.
- Kimberly-Clark Corporation
- Kimco Realty
- Kinder Morgan Incorporated
- Kindred Healthcare Incorporated
- King Kullen Grocery Company Incorporated
- King Pharmaceuticals Incorporated
- Kinross Gold Corporation
- Kirkland's Incorporated
- Knight-Ridder Inc
- Knoll Incorporated
- Knot Incorporated (The)
- Kohl's Corporation
- Kohler Company
- Kona Grill Incorporated
- Kraft Foods Inc.
- Krispy Kreme Doughnuts
- Kroger Company
- Kronos Incorporated
- Kyocera Corporation