Public companies are less likely these days to have to restate their earnings or other financial figures. Clients of PricewaterhouseCoopers LLP are bucking this trend recently, new data show.

The Big Four audit firm has had a streak of accounting problems surface recently at U.S. companies it audits, including an uptick in high-profile restatements. Its clients account for three of the five biggest restatements so far this year, measured by cumulative impact on net income, according to a Wall Street Journal analysis of data...