By Tripp Mickle 

The three largest U.S. tobacco companies will pay a total of $100 million to settle hundreds of pending federal lawsuits in Florida, resolving some--but not all--of the legal uncertainty that's hung over the industry since a class-action lawsuit was brought by state residents in 1994.

Altria Group Inc. and Reynolds American Inc. will each pay $42.5 million to resolve about 400 federal cases, and Lorillard Inc. will pay $15 million. The agreement excludes a handful of federal cases that have gone to trial.

The settlement is far less than the more than $500 million the industry has had to pay winning plaintiffs in Florida over the past decade, but it leaves unresolved more than 3,000 cases pending in state courts, cases that are bigger and more potentially damaging. Those suits are more difficult for the tobacco industry to settle because they are spread across the state's court system. The industry has fared worse in state court cases, winning just 40% of approximately 138 trials and paying damages of about $4.5 million a case, according to Matthew Grainger, an analyst with Morgan Stanley Research.

The Florida cases, which collectively became known as the Engle lawsuits, sprang from an initial class action lawsuit filed in Dade County Circuit Court in 1994 on behalf of a smoker, Howard Engle. The suit charged several big tobacco companies with misleading consumers. The defendants included Philip Morris USA, a subsidiary of Altria Group; R. J. Reynolds Tobacco Co., a unit of Reynolds American; Lorillard; and Liggett Group, a division of Vector Group Ltd.

In 2000, a Florida jury ordered that the companies pay a record-breaking $145 billion in damages, but that decision was later reversed in a 2006 ruling that decertified the class but allowed former class members to file individual suits. That paved the way for more than 9,000 suits to be filed in federal and state court.

Thousands of those cases have been dismissed. Plaintiffs have won about 60% of the remaining state and federal cases brought to trial and been awarded more than $500 million in damages from approximately 124 cases, according to Morgan Stanley.

The $100 million settlement announced on Wednesday won't become final unless all the individual plaintiffs in the cases agree to participate in the settlement, according to both parties in the case. Plaintiffs attorney Joe Rice of Motley Rice LLC said he expects that to be resolved in the next 60 to 90 days.

Altria and Lorillard said they will record the charges from their portions of the settlement in their first-quarter results.

Write to Tripp Mickle at Tripp.Mickle@wsj.com

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