The U.S. Securities and Exchange Commission filed only 15 new enforcement actions against public companies and their subsidiaries in the first half of fiscal year 2018—the lowest semiannual in five years, new figures show.

The trend was part of a report, “SEC Enforcement Activity: Public Companies and Subsidiaries—Midyear FY 2018 Update,” released Tuesday by the Pollack Center for Law & Business at New York University and by Cornerstone Research. The 15 enforcement actions compares with 45 in the same period a year ago.