PricewaterhouseCoopers released an update Tuesday to its annual audit quality report for the firm, pointing to improvements on inspection results from the Public Company Accounting Oversight Board.

For these firms, the audit watchdog has suggested strengthening independence protocols and internal governance.

PricewaterhouseCoopers is making efforts to improve its results on annual audit inspections by the Public Company Accounting Oversight Board, especially in comparison to its fellow Big Four firms. "We ...