For the second straight year, PwC fared the best among inspection results released by the Public Company Accounting Oversight Board (PCAOB) for the largest U.S. audit firms, including each of the Big Four, Grant Thornton, and BDO.

The results, posted Monday, cover the 2021 inspection cycle. Only two of PwC’s 56 audits reviewed (3.6 percent) returned deficiencies, a slight increase over last year’s rate (1.9 percent) but still a far cry from the 30 percent the firm was at in 2019.

Maria L. Murphy, CPA, is a regular contributor to Compliance Week. She is a senior content management analyst, accounting and auditing products, CCH tax and accounting North America for Wolters Kluwer....