Three of the Big Four audit firms saw increases to the deficiency rates observed in their latest Public Company Accounting Oversight Board (PCAOB) inspection reports, while the fourth had its results redacted.

The reports, published by the PCAOB on Feb. 28, cover the 2022 inspection cycle. For a third straight year, PwC had the lowest deficiency rate among the Big Four, though it jumped from 3.6 percent in 2021 to 9.3 percent.