Simpson Manufacturing says it was hit by a cyber attack on Tuesday, is working to investigate

Simpson Manufacturing Co.
SSD,
+2.83%,
an engineering and building materials producer, said Wednesday it was the subject of a cybersecurity incident on Tuesday that disrupted its IT infrastructure and applications. The Pleasanton, Calif.-based company has hired third-party experts to support a probe and recovery efforts. “The investigation to assess the nature and scope of the incident remains ongoing and is in its early stages,” the company said in a regulatory filing. The stock has gained 61% in the year to date, while the S&P 500
SPX,
+0.52%
has gained 13.5%.