No, but Hitachi’s was bought by WD back in 2011-2012. IIRC, they sold a part of it to Toshiba though.

There were talks about a merge around 2014, but it ultimately fell through. WD and Seagate are seperate companies.

Seagate and Western digital are two seperate companies. You’re correct in that neither own or are affiliated with the other.

There were talks of a merger for years starting back in ~2014, but that fell through.

I did just find out that Seagate is the parent company to LaCie though. They used to (probably still do) make some decently tough external haard drives.