In a ruling that effectively closes the books on more than a decade of antitrust lawsuits against office supply giant 3M, a federal judge has granted final approval of a class action settlement worth nearly $40 million and awarded more than $14.5 million in fees and expenses to the plaintiffs lawyers.

The $39.75 million settlement in Bradburn Parent/Teacher Store Inc. v. 3M — a class action brought by direct purchasers and retailers — came on the heels of a trio of settlements reached last year.