Which ASIC manufacturer (if any) made ASICs for XMR in the past?

Question

I checked out the medium post by MoneroCrusher over at medium.com which indicates that at one point in time, ASICs were most likely operating on the monero network.
Has anyone figured out who was behind it?

Answer 1

There may have been others, but at least Baikalminer^[archive] and Bitmain^[archive] launched Monero ASIC miners in 2018.

It's worth noting Bitmain allowed people to buy the ASICs, but didn't actually ship them until after the Monero hardfork - meaning only Bitmain themselves were able to mine XMR on their own ASICs, and knowingly scammed their customers thereafter.