| Company name | Reg. code |
|---|---|
| NION OÜ kustutatud | 12619199 |
| NION DESIGN OÜ | 12440804 |
| NIOM OÜ kustutatud | 14411059 |
| NIOC EXCHANGE OÜ (former name Admire Exchange OÜ) | 14648147 |
| NAMM DIAGNOSTIKA OÜ (former name NIoT OÜ) | 17192713 |
| NIONES OÜ | 16115343 |
| NOION OÜ | 16638153 |
| BION OÜ | 12776025 |
| NIHON OÜ | 16028294 |
| ZION13 OÜ kustutatud | 16391681 |
| NCON OÜ | 17274316 |
| UNION33 OÜ | 17389864 |
| ZION07 OÜ | 14597608 |
| DION OÜ kustutatud | 11350068 |
| RION OÜ kustutatud | 12088448 |
| NIIN OÜ | 14717760 |
| ANION OÜ | 10199155 |
| NOON OÜ | 12035914 |
| LION OÜ | 12258459 |
| ION OÜ | 11874469 |
| GOOD ONION OÜ | 12208579 |
| ZION COLLECTION OÜ | 16950436 |
| ORNAMENTAL ONION OÜ kustutatud | 16351109 |
| UNION KLIINIK OÜ | 12642382 |
| FLAGMAN UNION OÜ | 17118237 |
| LION HOLDING OÜ | 11465564 |
| TRANSPORT UNION OÜ kustutatud | 14280612 |
| KRIST UNION OÜ | 14496424 |
| UNION FINTECH OÜ (former name Vivalte & Co OÜ) | 10964710 |
| UNION-ATLANTICA OÜ | 16694803 |
| ROARING LION OÜ | 17418933 |
| NOON TEE OÜ | 11168783 |
| LION KÄSITÖÖ OÜ | 16765006 |
| CAN LION OÜ kustutatud (former name Andremat OÜ) | 16301583 |
| NIRN MEDIA OÜ | 17070223 |
| NORTHEAST UNION OÜ kustutatud | 14969934 |
| LION TRADE OÜ kustutatud | 12886546 |
| NIKN AUTO OÜ | 12645133 |
| LION TRANSPORT OÜ kustutatud | 16305500 |
| GS UNION OÜ | 12119597 |
| LION ENGINEERING OÜ kustutatud | 10948059 |
| ALPHA UNION OÜ | 14682641 |
| NORDIC UNION OÜ | 12596570 |
| NEON DIGITAL OÜ | 14912785 |
| ELECTRO UNION OÜ kustutatud | 12320846 |
| UNION LOGISTICS OÜ kustutatud | 16024988 |
| AV1SION OÜ | 17388913 |
| UNIVERSAL UNION OÜ | 14887432 |
| ANION CONSULTING OÜ (former name Heidy Hilbud OÜ) | 14224737 |
| LION GATES OÜ | 14615337 |