One of the nation’s largest pension plans filed a lawsuit Thursday accusing Wal-Mart’s leadership of breaching its fiduciary duty in connection with a bribery scandal at the retailer’s Mexican subsidiary.

Walmart

The pension plan, the California State Teachers’ Retirement System, owns about 5.3 million shares in Wal-Mart , worth about $313 million. Though that is a small stake — far less than 1 percent — the suit was filed on behalf of Wal-Mart itself against people the pension plan identified as having failed their duties to the company.