The Public Company Accounting Oversight Board publishes inspection reports on the largest firms annually. After several years of reporting, the board has steadily increased the amount of data it provides in each report. Over time, the reports are beginning to reveal differences in how the largest firms have adapted to the new regulatory regime.
The following tables, compiled by Columnist Tammy Whitehouse, summarize audit deficiencies across the six largest firms from 2009 to 2016, the last year for which complete data is available for those firms.
