| Korea Security Authentication, Inc. | Seoul |
| Korea Semiconductor Industry Association | Seoul |
| Korea Software Laboratory Co., Ltd | Seoul |
| Korea Soongsil Cyber University | Seoul |
| Korea Telecom | Gyeonggi |
| Korea Telephone Directory | Seoul |
| Korea University | Seoul |
| Korea University - Department of Mathematics | Seoul |
| Korea University Holdings | |
| Korea University of Media Arts | |
| Korea Vilene Co., Ltd | |
| Korea-Israel Industrial R&D Foundation | |
| Korean Academy of Science and Technology | |
| Korean Aerospace Research Institute | |
| Korean Bioinformation Center | Seoul |
| Korean Institute of Startup and Entrepreneurship Development | Sejong |
| Korean Mathematical Society | Seoul |
| Koreatech | |
| KoreaTechDesk | |
| Koryo Software Co., Ltd | Seoul |
| Kosin University | |
| Kovis Technology | Seoul |
| KoVRA | Seoul |
| KPLUS | Seoul |
| Krafton, Inc. | Seoul |
| Ksmartech Co., Ltd | Seoul |
| KSNET | Seoul |
| KT Investment Co., Ltd | Seoul |
| KT SAT | |
| KTNET | Seoul |
| Kumoh National Institute of Technology | |
| Kunjiang University College | |
| Kunsan College of Nursing | |
| Kunsan National University | |
| KVC | Gyeonggi |
| KW UT Solution Co., Ltd | Gyeonggi |
| Kwangju Women's University | |
| KwangWoon University | |
| Kyonggi University | Gyeonggi |
| Kyung Hee Cyber University | |
| Kyung Hee University | |
| Kyung Jin Electron Co., Ltd | Seoul |
| Kyungbok University | |
| Kyungbuk College | |
| Kyungdong University | |
| Kyungil University | |
| Kyungmin University | |
| Kyungnam University | |
| Kyungpook National University | |
| Kyungsung University | |