According to WebHosting.info Moniker.com has just been passed by Register.com and now is the 10th largest registrar in the world.
According to the stats Register.com now has 40,000 more domains under management than Moniker.com
Webhosting.info stats do not include all ccTLD’s but is a good measure for registrars that are gaining or losing registrations.
The 11th largest registrar is Key-Systems which is about 400,000 domains behind Moniker.com
Earlier this year Moniker.com was the 7th largest registrar and seems to be hit particularly hard by declining PPC revenue as they have a large domainer clientele