3M Co. has tentatively agreed to pay more than $5.5 billion to resolve over 300,000 lawsuits claiming it sold the U.S. military defective combat earplugs, people familiar with the deal have said.

The settlement would avert a potentially much larger liability that 3M sought to curb through a controversial bankruptcy case that ultimately collapsed. The sum is about half the roughly $10 billion some financial analysts predicted 3M could end up paying over allegations the earplugs didn’t adequately protect the hearing of service members.

Traders welcomed the resolution. 3M shares were up 5.8% at $104.66 at 9:45 a.m. in New York on Monday.