Interesting slide about the cryptocurrencies Bitmain claims to hold in the context of their IPO:
https://twitter.com/Excellion/status/1028426579158884352Monero isn't explicitly mentioned, although Bitmain probably used to mine monero with their Antminer X3 I think.
Perhaps off-topic here, but I think it's also interesting to point out that they acquired 179,450 BCC between 31-DEC-17 and 31-MAR-18. That's more than the total amount of bcc that have come into circulation in that period
