Seagate Technology (NASDAQ: STX) is an American technology company, one of the world's largest manufacturers of hard disk drives. Incorporated in 1978 as Shugart Technology, Seagate is currently incorporated in Dublin, Ireland and has its principal executive office in Cupertino, California.

Seagate has been a leader in the development of the hard disk drives since releasing the 5 MB ST-506 drive in 1980, the first 5.25-inch hard drive. They were a major supplier in the microcomputer market during the 1980s, especially after the introduction of the IBM XT in 1983. In 1989 they finalized the purchase of Control Data Corporation's Imprimis division, makers of the well regarded Wren product line. This gave Seagate access to the Wren's voicecoil-based technology. In 1991 they introduced the 7,200 RPM Barracuda line, which remains their high-end offering to this day. They purchased Maxtor in 2006

On November 1, 1979 Seagate Technology (then called Shugart Technology) was incorporated by co-founders Al Shugart, Tom Mitchell, Doug Mahon, Finis Conner and Syed Iftikar. The name was soon changed to Seagate Technology to avoid confusion with Xerox's subsidiary Shugart Associates (also founded by Shugart).