| Company name | Reg. code |
|---|---|
| XSK OÜ | 14873200 |
| LSK OÜ | 17376519 |
| KSK OÜ kustutatud | 12085390 |
| JSK OÜ kustutatud | 16072774 |
| XASK OÜ | 16145605 |
| VSK OÜ | 14641599 |
| ÄSK OÜ | 14222218 |
| RSK OÜ kustutatud | 14783945 |
| KSK OÜ | 16841428 |
| SSK OÜ | 12172491 |
| ASK CARL OÜ | 16700120 |
| HSK MEDIA OÜ | 16630393 |
| ASK&UNDERSTAND OÜ kustutatud | 14645999 |
| ESK GRUPP OÜ | 10883816 |
| JSK IDA OÜ | 14504626 |
| SSK WELDING OÜ | 14330161 |
| ESK SURF OÜ | 14122451 |
| DSK COMPANY OÜ | 16154946 |
| ASK ENTERPRISES OÜ (former name Anouk Knuffmann OÜ) | 16261576 |
| OSK_DIGITAL OÜ | 16498226 |
| ALVIRA VSK OÜ | 10692068 |
| BSK GAMES OÜ kustutatud (former name InterMassive OÜ) | 12994388 |
| TSK TRADE OÜ | 12770370 |
| JSK INVESTEERINGUD OÜ | 11308117 |
| SSK INVESTEERINGUD OÜ | 12369911 |
| MSK SCUBAGEAR OÜ kustutatud | 12776728 |
| KSK MOTORS OÜ | 16076175 |
| RSK PLUSS OÜ kustutatud | 11446012 |
| RSK INVESTMENTS OÜ | 14846545 |
| JSK POLYMER OÜ (former name Clipband Nordic OÜ) | 14003210 |
| KSK SPORTS OÜ kustutatud | 16144341 |
| MSK SUKELDUMISKOOLITUS OÜ kustutatud | 12769740 |
| ALEX OSK OÜ | 14620255 |
| HSK VARAD OÜ | 14198282 |
| BSK GROUP OÜ | 16463050 |
| KSK TRADE OÜ | 14484266 |
| HIIU HSK OÜ | 11394611 |
| ASK ACCOUNTING OÜ | 16780106 |
| KSK MORA OÜ | 16886282 |
| ESK-MAIK OÜ kustutatud | 10318223 |
| ASK TEENUS OÜ | 10076955 |
| FSK INFINITY OÜ | 12877381 |
| ISK-NORD OÜ | 17439786 |
| DSK TEENUSED OÜ | 17464040 |
| PSK MÖÖBEL OÜ | 12836034 |
| SSK THINKTANK 2017 OÜ kustutatud (former name Deltapoint OÜ) | 14161020 |
| JSK CONSULT OÜ | 16605231 |
| RSK AGRO OÜ kustutatud | 12368604 |
| LSK TEENUSED OÜ | 17325447 |
| ZSK WESTTECH OÜ kustutatud | 16351316 |