AVX – United States
Cornell-Dubilier – United States
EEStor – United States
Epcos – Germany
Europe Chemi-Con (ECC) – Japan
Elna – Japan
Hitachi – Japan
KENDEIL S.r.l. – Italy
KEMET – United States
KOA – Japan
Man Yue – China
Murata – Japan
Mouser Electronics – United States – really Mouser makes caps???
Nichicon – Japan
Nippon Chemi-Con (NCC) – Japan Very Good
Panasonic – Japan | Okay
Philips Lighting – Netherlands
Rubycon – Japan Good
Samsung – South Korea
Seacon – India? Nakamichi used these but most people say crap
Taiyo Yuden – Japan
TDK – Japan
United Chemi-Con (UCC) – Japan
Vishay – United States
Würth – Germany
Yageo – Taiwan

Defunct
Mallory – United States
Sprague – United States – widely regarded as the best
Grande Capacité – France [3]
A. H. Hunts – United Kingdom[4][5][6][7][8][9]
Procond Oy – Finland
Marcon – Bought by Nippon Chemi-con[10]