KoF 2001 software was developed by Korean company Eolith in conjunction w/ Japanese company SNK. Playmore holds the IP’s, Sun Amusement distributes for the Japanese market, BrezzaSoft brings the new Crystal System and carries the spirit of SNK.
As far as production is concerned, I’m not aware of any American Companies being involved with English KoF 2001 ROM (home cartridge). Most likely shipping from Osaka, Japan, just as all English release have been since SNK USA closed its doors.