BeyondTrust (formerly Symark) is an American company that develops, markets, and supports a family of privileged identity management and vulnerability management products for UNIX, Linux, Windows and Mac OS operating systems. BeyondTrust was originally founded in 2006 and provided Least Privilege Management software for the Microsoft Windows OS, before UNIX vendor Symark acquired BeyondTrust in 2009 and adopted BeyondTrust as the new company name. Symark was founded in 1985 as a VAX/VMS utility software company in Los Angeles' San Fernando Valley. Its name derives from the initials of its founders, Bob Sommers and Doug Yarrow. Symark was also a client-server computing vendor, before later acquiring a license for the UNIX security product UPM (now owned by Quest Software) and rebranding their version PowerBroker. Symark relocated to Westlake Village, California, then again to Agoura Hills.