A widening insider-trading probe is causing new tremors in Silicon Valley, as prosecutors say a network of employees at technology companies acted as paid informants for managers of a San Francisco hedge fund implicated in the case. A criminal complaint filed Thursday by the Manhattan U.S. Attorney's office says employees at six unnamed technology companies provided information to Richard Choo-Beng Lee, co-founder of the hedge fund Spherix Capital LLC. Employees at four unnamed companies provided information to Ali Far, Mr. Lee's partner at Spherix, according to a separate complaint. http://online.wsj.com/article/SB125754141766234531.html