Judges in the southern city of Marseille, where the concert was to take place, convicted the four of involuntary manslaughter and injuries, while acquitting three others ordered to stand trial.
Eight other workers sustained injuries in the accident, which occurred when one of four cranes putting up metal scaffolding for the stage knocked into the structure's roof.
Charles Criscenzo, 52, of France and Charles Prow, a 23-year-old Briton, were killed at Marseille's Velodrome stadium, and one of the injured workers committed suicide two years later.
Madonna herself did not appear at the trial, saying she was not involved in the technical details and denying any pressure to build the stage more quickly. She did present her condolences to the victims' families.
After a 10-year investigation, Jacqueline Bitton, 73, at the time head of the French operations for the US concert promoter Live Nation, received the most severe sentence, a suspended two-year prison term and a fine of €20,000.
Tim Norman, 65, head of the British firm Edwin Shirley Group (ESG) that owned the stage, received a suspended two-year term as well as a €15,000 fine.
A manager at a French subcontractor hired by ESG, Tour Concept France, was given a suspended 18-month sentence and a €10,000 fine, while a British foreman hired for the job by ESG got an 18-month suspended sentence.
Live Nation France was ordered to pay a €150,000 fine, and Tour Concept €50,000.
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