has the ownership changed since its establishment?
Yes, to Vivendi Universal.
USA Network
In 2001, USA Networks sold its non-shopping television and film assets (including USA Network, the Sci-Fi Channel, Trio, USA Films (which was rechristened as Focus Features and Studios USA) to Vivendi Universal. 
what is "speak now or forever hold your piece"? the third episode of the first season of the series "Psych". on which network was it aired? USA Network who are the characters in this episode? Shawn Spencer and Burton "Gus" Guster. can you describe the plot in a few words? a multimillion-dollar engagement ring is stolen from a hotel vault, and Shawn Spencer and Burton "Gus" Guster investigate, without the permission of the police department. who owns the network you mentioned? NBCUniversal Television
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USA Network [SEP] Vivendi ownership (2001–2003)
In 2001, USA Networks sold its non-shopping television and film assets (including USA Network, the Sci-Fi Channel, Trio, USA Films (which was rechristened as Focus Features and Studios USA) to Vivendi Universal. USA and the other channels were folded into Vivendi's Universal Television Group. In July 2002, the channel debuted "Monk", which became one of USA Network's first breakout hit series. It is the comedy-drama police procedural that starred Tony Shalhoub as Adrian Monk, a former San Francisco police inspector-turned-consultant who suffers from various obsessive-compulsive behaviors that include the ability to pay attention to detail when solving crimes. It ran for eight seasons until it ended on December 4, 2009.