| KAYAKSearch Flights, Hotels & Rental Cars | KAYAK | Internet | Norwalk | CT | $100 - 250M |
| Kelley Blue BookKelley Blue Book - New and Used Car Price Values, Expert Car Reviews | Automotive | Irvine | CA | $50 - 100M |
| | Internet | Milano | Lombardia | $1 - 10M |
| | Human Resources | Maroussi | Attica | $1 - 10M |
| | Food & Beverages | Norwich | VT | $10 - 50M |
| KQEDKQED Public Media for Northern CA | Broadcast Media | San Francisco | CA | $50 - 100M |
| KeysurveyOnline survey software & questionnaire tool, survey maker - Key Survey | Information Technology and Services | Braintree Town | MA | $1 - 10M |
| | Nonprofit Organization Management | San Francisco | CA | $10 - 50M |
| KnabSlim bankieren bij Knab, de bank in jouw voordeel | Knab.nl | Financial Services | Hoofddorp | NH | $10 - 50M |
| | Internet | Maple Plain | MN | $1 - 10M |
| | Professional Training & Coaching | Bristol | | $10 - 50M |
| Kelly Services
Staffing Agencies - Workforce & Staffing Solutions by Kelly Services
| Staffing and Recruiting | Troy | MI | > $1B |
| | Venture Capital & Private Equity | Menlo Park | CA | $10 - 50M |
| Korn FerryExecutive Search Recruiters - Recruitment Process Outsourcing | Korn Ferry | Management Consulting | Los Angeles | CA | $500M - 1B |
| Kofax
First Mile | Smart Process Apps | Document & Data Capture Software | Kofax
| Computer Software | Irvine | CA | $1 - 10M |
| KrossoverKrossover Game Film Tools for Coaches & Athletes | Sports | New York | NY | $1 - 10M |
| | Hospitality | Vancouver | BC | $1 - 10M |
| | Higher Education | Bellevue | WA | > $1B |
| Karel ElectronicsKarel | IP Santral Telefon, ?a?r? Merkezi, Güvenlik Kamera, ?nterkom ve ?ok daha fazlas?... | Electrical/Electronic Manufacturing | stanbul | | $500M - 1B |
| | Electrical/Electronic Manufacturing | Simpsonville | SC | $500M - 1B |
| | Education Management | San Francisco | CA | $10 - 50M |
| | Industrial Automation | Portland | ME | $1 - 10M |
| KI
Furnishing Knowledge : KI
| Furniture | Green Bay | WI | $500M - 1B |
| | Retail | San Carlos | CA | $250 - 500M |
| KaBOOM!Play Matters for All Kids | KaBOOM! | Nonprofit Organization Management | Hammonton | NJ | $0 - 1M |
| Klocwork
Source Code Analysis Tools for Security & Reliability | Klocwork
| Computer Software | Burlington | MA | $10 - 50M |
| | Computer Software | | | $0 - 1M |
| | Consumer Goods | Newbury | OH | $10 - 50M |
| KNG Inc.KNG? Official Site | Quality Restaurant Products Since 1965 | Business Supplies and Equipment | Nampa | ID | $10 - 50M |
| Kitchen Craft
Modern European-Style Kitchen Cabinets ??? Kitchen Craft
| Furniture | | | |
| Knight KnoxFull Service Property Consultancy - Knight Knox | Real Estate | Salford | England | $1 - 10M |
| KerryWelcome to Kerry - the Taste and Nutrition Company | Kerry | Food Production | Beloit | WI | > $1B |
| | Internet | Covington | KY | $0 - 1M |
| | Information Technology and Services | | | $10 - 50M |
| Karbon IncWorkflow Management & Task Management for Accounting Firms | Karbon — Karbon | Computer Software | Sausalito, California | | |
| | Staffing and Recruiting | Toronto | ON | $1 - 10M |
| | Entertainment | Franklin | TN | $1 - 10M |
| KenandyKenandy Cloud ERP on Salesforce | Computer Software | Redwood City | CA | $0 - 1M |
| KellyOCG
Outsourcing and Consulting Services
| Management Consulting | Troy | MI | > $1B |
| Kenmore Design LLCForex Backoffice Systems, Web Design & Custom Development | Kenmore Design | Information Technology and Services | Boston | MA | $0 - 1M |
| | Furniture | Jasper | IN | > $1B |
| KPLKPL Website Announcement | Biotechnology | Gaithersburg | MD | $1 - 10M |
| KwaluKwalu | Furniture that's Designed to Last | Furniture | | | $1 - 10M |
| | Consumer Goods | | | $10 - 50M |
| Kelvin TOP-SETKelvin TOP-SET | Incident Investigation and Problem Solving | UK USA | Professional Training & Coaching | Fairlie | North Ayrshire | |
| | Paper & Forest Products | Westford | MA | $250 - 500M |
| Kipu SystemsKipu Systems - Electronic medical records for the substance abuse industry. | Computer Software | Miami | FL | $1 - 10M |
| | Automotive | Lafayette | CO | $1 - 10M |
| KeepItSafe
KeepItSafe | Online Cloud Backup, Data Storage & Disaster Recovery Services
| Information Services | Hollywood | CA | $100 - 250M |
| KognitioBig Data Analytics, Kognitio on Hadoop, Analytical Platform | Information Technology and Services | Bracknell | Berkshire | $10 - 50M |
| KalidoData Warehouse Automation & Master Data Management Solutions | Kalido | Computer Software | Burlington | MA | $10 - 50M |
| | Financial Services | Valley Cottage | NY | $10 - 50M |
| | Education Management | New York | NY | $0 - 1M |
| Kinetic GrowthHome - Kinetic Growth | Salesforce eCommerce, renewals and subscriptions | Computer Software | | | |
| | E-Learning | Singapore | | $1 - 10M |
| | Financial Services | Roslyn Heights | NY | $1 - 10M |
| Kyowa Hakko USAKyowa USA: Manufacturer of fermented amino acids & branded ingredients | Biotechnology | New York | NY | $500M - 1B |
| | Health, Wellness and Fitness | | | $1 - 10M |
| | Design | St. Louis | MO | $1 - 10M |
| | Financial Services | Media | PA | $0 - 1M |
| | Local Business | WEST LAFAYETTE | IN | $1 - 10M |
| | Facilities Services | Maumee | OH | $10 - 50M |
| | Mining & Metals | Honey Brook | PA | $10 - 50M |
| Kamps PropaneHome | Kamps Propane | California's Clean Energy Company | Oil & Energy | Manteca | CA | $0 - 1M |
| | Computer Software | San Diego | CA | $0 - 1M |
| | | | | $0 - 1M |
| | Design | Minneapolis | MN | $0 - 1M |
| KCF TechnologiesKCF Technologies |Vibration Analysis| CMMS | Vibration Monitoring | Defense & Space | State College | PA | $1 - 10M |
| | Telecommunications | Braintree | MA | $10 - 50M |
| | Computer Software | | | |
| | Information Technology and Services | Ottawa | ON | $1 - 10M |
| | Information Technology and Services | Hickory | NC | $0 - 1M |
| | Philanthropy | Carmichael | CA | $0 - 1M |
| | Marketing and Advertising | Kansas City | MO | $1 - 10M |
| | Insurance | Reston | VA | $1 - 10M |
| | Information Technology and Services | Staffs | Staffs | $1 - 10M |
| | Internet | | | $1 - 10M |
| | Information Technology and Services | Irving | TX | $1 - 10M |
| | Marketing and Advertising | Toronto | ON | $1 - 10M |
| KalahariPricing & Analytics Software for Financial Institutions | Kalahari | Computer Software | Old Woking | Surrey | $1 - 10M |
| KyruusPatient Access Solutions | Kyruus | Hospital & Health Care | Boston | MA | $0 - 1M |
| | Education Management | Moorestown | NJ | $0 - 1M |
| | Management Consulting | Chester | NJ | $0 - 1M |
| | Management Consulting | Barcelona | Catalonia | $0 - 1M |
| | Management Consulting | Chicago | IL | $0 - 1M |
| | Oil & Energy | Houston | TX | > $1B |
| KesteKeste | Award-Winning Solutions Software and Development Company | Information Technology and Services | Plano | TX | $10 - 50M |
| | Staffing and Recruiting | Troy | MI | > $1B |
| | Apparel & Fashion | New York | NY | $1 - 10M |
| | | Santry | | |
| | Information Technology and Services | Centurion | | $0 - 1M |
| | Computer Software | Oak Brook | IL | $1 - 10M |
| Kaiser AssociatesKaiser Associates?| Management Consulting, Strategy Consulting : Kaiser Associates | Management Consulting | Washington | DC | $10 - 50M |
| | Staffing and Recruiting | London | | $1 - 10M |
| Kinetic DataRequest Management Software for Business Process Automation | Information Technology and Services | Saint Paul | MN | $10 - 50M |