| Participant | Country | Stand number |
|---|---|---|
| Kalashnikov Group | Russia | 717 |
| Katav-Ivanovsk Maritime Instrument Making Plant JSC | Russia | 230; water area |
| Kazan Electrotechnical Plant PAO | Russia | 702 |
| KBM AO | Russia | 705 |
| Keysight Technologies OOO | Russia | 755 |
| Kingiseppsky Machinery Plant | Russia | 728; water area |
| Kirov Engineering Plant JSC | Republic of Kazakhstan | 822 |
| Kirov-Energomash JSC | Russia | 823 |
| Kolchugino Elektrokabel Plant JSC | Russia | 233 |
| Kolomensky Zavod PJSC | Russia | 835 |
| Koltsov Special Design Bureau JSC | Russia | 243 |
| Komolov IP | Russia | 763 |
| Kopir Zavod JSC | Russia | 204 |
| Kostroma Marine Engineering Factory JSC | Russia | 739; water area |
| Kouznetsov Naval Academy, St.Petersburg | Russia | 220 |
| Krasnoe Sormovo Shipyard PJSC | Russia | 701 |
| Krasnogorsky zavod named after S. A. Zverev Public company | Russia | 721 |
| KRASNY HYDROPRESS JSC | Russia | 705 |
| KRIZO Factory JSC | Russia | 836 |
| KROHNE Engineering LLC | Russia | 232 |
