Earlier this week, we told you prosecutors were examining trades made by Raj Rajaratnam in dozens of stocks that were previously undisclosed in the vast insider trading investigation. On the list were shares of Goldman Sachs, which Galleon allegedly traded right around the height of the financial crisis.

Today we learn from Susan Pulliam of The Wall Street Journal that investigators are zeroing in on soon-to-be-former Goldman director named Rajat Gupta. Gupta says he’s unaware of any probe.

Raj and others indicted in the probe are scheduled to go on trail in October. That leaves some time for prosecutors to bring charges against more people.

As part of that focus, the government is examining whether Rajat Gupta—a current Goldman director, former head of McKinsey & Company and close associate of Mr. Rajaratnam’s—shared inside information about Goldman, the people close to the situation say.

No criminal charges or other allegations have been filed against Mr. Gupta, nor is there any indication that investigators are looking at his own stock trading. A spokesman for Mr. Gupta said, “Mr. Gupta is unaware of any examination of any such issue and has done nothing wrong.”