(Reuters) – A California jury on Monday awarded more than $2 billion to a couple who claimed Bayer AG’s glyphosate-based Roundup weed killer caused their cancer, in the largest U.S. jury verdict to date against the company in litigation over the chemical.

Monsanto Co’s Roundup is shown for sale in Encinitas, California, U.S., June 26, 2017. REUTERS/Mike Blake

The large punitive damages award is likely to be reduced due to U.S. Supreme Court rulings that limit the ratio of punitive to compensatory damages to 9:1. The jury awarded a total of $2 billion in punitive damages and $55 million in compensatory damages.

It was the third consecutive U.S. jury verdict against the company in litigation over the chemical, which Bayer acquired as part of its