Two of the jockeys found guilty of corruption by the British Horseracing Authority have each been given 12-year bans for their part in the case.
Greg Fairley and Paul Doe faced charges relating to races which took place in 2009.
The two other jockeys involved, Kirsty Milczarek and Jimmy Quinn, have been banned for two years and six months respectively.
A further seven individuals, including Maurice Sines and James Crickmore, were also found guilty.
Sines and Crickmore were given bans of 14 years each, while Liam Vasey was banned for five years, David Kendrick four years and Shaun Harris three years.
Nick and Peter Gold's punishments will be made pending further written submissions.
BHA director Paul Scotney said: "While it is the names of the jockeys that the racing public will recognise, people should be under no illusions that it is the lesser known names who were the instigators of these serious breaches of the rules.
"What lies at the heart of this investigation are the actions of two individuals, Maurice Sines and James Crickmore, who, together with their associates, were prepared to corrupt jockeys and to cheat at betting by the misuse of 'inside information'."
Paul Fitzsimons, who is now a trainer, was cleared of all charges.
