- Kadir Has University
- Kagoshima University
- Kalray
- Kamnoetvidya Science Academy
- Kansai University
- Kansas State University
- Kantar
- Kaposvár University
- Karakoram International University
- Karl-Franzens-Universität Graz
- Karlsruhe Institute of Technology = Karlsruher Institut für Technologie
- Karlsruhe Transformation Center for Sustainability and Cultural Change
- Karolinska Institutet [Stockholm]
- Karolinska University Hospital [Stockholm]
- Karpov Institute of Physical Chemistry
- Kart'eau
- Kart’eau
- Kasetsart University [Bangkok, Thailand]
- Kaunas University of Technology
- Kazakh Hydro-meteorological Agency
- Kedge Business School
- KEDGE Business School [Marseille]
- KEK
- Kélonia - Observatoire des tortues marines
- Kent State University
- Kenyatta University of Nairobi
- Kenyon College
- KEREVAL
- kerlabs
- Kermap [Rennes]
- Kernfysisch vesneller Instituut
- Keystone Foundation & Last Forest
- KfV
- KFV, Austrian Road Safety Board
- KGZS-Zavod
- Kharazmi University [Tehran]
- Kharkiv National University of Radio Electronics
- KiM Netherlands Institute for Transport Policy Analysis
- Kineo CAM
- Kinergos Conseil
- King Abdullah Petroleum Studies and Research Center
- King Abdullah University of Science and Technology [Saudi Arabia]
- King Saud University [Riyadh]
- King‘s College London
- Kingston University Business School
- KIRA Center
- KIRDI
- KIT|NTNU
- Kmetijski Institute of Slovenia
- Knipovich polar Research Institute of Marine Fisheries and Oceanography
- Know-Center Graz
- Knowledge Media Research Center (KMRC) - Tübingen
- KNT
- Kobe University
- Koç University
- KOENA
- KOF Swiss Economic Institute
- Kompetenzzentrum Wasser Berlin, Berlin, Germany
- KONE Corporation
- KONTRON [Ismaning]
- KONTRON [Toulon]
- KORA
- Korea Advanced Institute of Science and Technology
- Korea Electronics Technology Institute [Seongnam-si]
- Korea Telecom
- Korea University [Seoul]
- KORIKA
- Korilog [Muzillac]
- Kreavet
- KRONO‐SAFE
- KRTK Institute for Regional Studies
- Krypton Brothers (.)
- KTH Royal Institute of Technology [Kista]
- KTH Royal Institute of Technology [Stockholm]
- Kulturhistorisk museum
- Kútvölgyi Clinical Centre
- Kuwait University
- KWS Momont SAS
- KXEN
- Kyiv School of Economics
- Kyoto University
- Kyushu University