Seagate Technology PLC (commonly referred to as Seagate) is an American data storage company. It was incorporated in 1978, as Shugart Technology. Since 2010, the company is incorporated in Dublin, Ireland, with operational headquarters in Cupertino, California, United States. David Mosley is the current CEO with Stephen J. Luczo as chairman of the board of directors. In January 2009, Luczo, Seagate's chairman, was appointed president and chief executive officer, returning him to the role he held at Seagate from 1998 to 2004.On October 2, 2017 COO David Mosley was appointed CEO and Luczo stepped down from that role.

Seagate Technology (then called Shugart Technology) was incorporated on November 1, 1978, and commenced operations with co-founders Al Shugart, Tom Mitchell, Doug Mahon, Finis Conner and Syed Iftikar in October 1979. The company came into being when Conner approached Shugart with the idea of starting a new company to develop 5.25-inch HDDs which Conner predicted would be a coming economic boom in the disk drive market. The name was changed to Seagate Technology to avoid a lawsuit from Xerox's subsidiary Shugart Associates.

Seagate is product portfolio consists of Flash controller.