Processing of nuclear fuel

Companies (6) Ranking sector Top ranking Follow-up
1 Synatom 1000 BRUSSEL Sector ranking 19 GEL Top ranking 564 Follow-up
2 Brancaleoni Diffusion 4140 SPRIMONT Sector ranking 136 EXT Top ranking 346,553 Follow-up
3 Utema 6041 GOSSELIES Sector ranking 366 AIM Top ranking 56,275 Follow-up
4 FBFC International 1210 BRUSSEL Sector ranking 710 MEV Top ranking 46,263 Follow-up
5 RAD4MED.BE 1160 BRUSSEL Sector ranking No ranking GEL Top ranking No ranking Follow-up
6 Tommeleyn en Zonen 8920 LANGEMARK Sector ranking 472 GEL Top ranking 208,153 Follow-up

(*) This company is not ranked by turnover.
How are companies ranked?