If anyone here hasn't realised, Symantec bought Verisign back in 2010 - who own many brand names, like GeoTrust, Equifax, Thawte etc. You can see a list of their roots certs here: https://chromium.googlesource.com/chromium/src/+/master/net/...
In case you missed it at the bottom:
> From Mozilla Firefox’s Telemetry, we know that Symantec issued certificates are responsible for 42% of certificate validations