Aug 20, 2015 The online gambling industry is coming close to entering its official 20th year of existence.

In the past two decades, a number of top companies have emerged that have really dominated the landscape of this industry.

This includes a mix of older companies who got their start in online gambling in the late 1990s as well as companies that have come up a bit later on the scene.

Whether they're a part of the new breed like Canada's own Amaya Gaming Group, or if they're a part of the old guard, all of the largest top ten businesses in this industry have been through a lot of interesting events.

Since 1997, it has been known for focusing and producing high-class, high-profile online gambling sites.

888 Holdings has a focus on quality over quantity even though they cover every major type of Internet gambling company including bingo, poker, casino, sports and casual gaming.

While they are number ten on this list, their overall worth is pretty big considering how relatively few sites they operate compared to some of the other holdings groups on this list.