In the expert-network investigation, the government recorded phone calls of public-company employees such as Mark Anthony Longoria, formerly of chip maker Advanced Micro Devices Inc.

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Mark Anthony Longoria, Daniel L. DeVore, Winifred Jiau and Walter Shimoon allegedly accessed inside information about companies including Apple, Dell, AMD, Marvell and Flextronic without the knowledge of their employers.

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Federal law enforcement also arrested this morning Mark Anthony Longoria, 44, who was employed by Advanced Micro Devices and Manosha Karunatilaka, 37, an employee of Taiwan Semiconductor Manufacturing, and accused them of conspiracy to commit securities fraud.

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