- Rubycon
- United Chemi-Con (or Nippon Chemi-Con)
- Nichicon
- Sanyo/Suncon
- Panasonic
- Hitachi
- FPCAP or Functional Polymer Capacitor (ex-Fujitsu caps segment, which was bought by Nichicon)
- ELNA
- Cornell Dubilier (USA)
- Illinois Capacitor (Currently owned by Cornell Dubilier)
- Kemet Corporation (USA)
- Vishay (USA)
- EPCOS (TDK company, Germany)
- Würth Elektronik (Germany)
- Taicon (belongs to Nichicon)
- Teapo
- SamXon (except GF series which belongs to a lower Tier)
- OST
- Toshin Kogyo
- Jamicon
- CapXon
- G-Luxon
- Su'scon
- Elite
- Lelon
- Ltec
- Jun Fu
- Fuhjyyu
- Evercon