List of optical disc manufacturers

This aims to be a complete list of optical disc manufacturers, including pre-recorded/pressed/replicated, record-able/write-once and re-writable discs.
This list is not necessarily complete or up to date - if you see a manufacturer that should be here but isn't (or one that shouldn't be here but is), please update the page accordingly. This list only lists manufacturers - not brands. For example, many Maxell DVDs are made by Ritek or CMC magnetics. Many companies use equipment from Singulus Technologies. This list includes both CD, DVD and Blu-ray recordable and rewritable media manufacturers (like Ritek), and disc replicators (companies that replicate discs with pre-recorded content, like Sony DADC)
P.
Princo Corp (seems to have stopped, as of 2020 they no longer appear on their home page)