Marketwired was a press release distribution service headquartered in Toronto, Ontario, Canada.

Marketwired was founded as Internet Wire in October 1994 by PR agency owner Michael Terpin and online marketer Michael Shuler in Los Angeles, California, United States.

[2] In 2000, a former employee of Internet Wire used the service to perpetrate an insider trading scam.

In July 2010, Marketwire acquired Sysomos, a social monitoring and analytics service, offering customers the ability to track their social presence across sites like Facebook and Twitter.

[5] In October 2011, Marketwire filed a lawsuit accusing PR Newswire of trying to steal confidential information and trade secrets, seeking at least $25 million in damages.