LIVE: Activist hedge funder Barry Rosenstein is talking about his biggest stake--Qualcomm

Activist investor Barry Rosenstein, the founder of $11 billion JANA Partners, is speaking at the Sohn Conference in New York.

He's going to explain the benefits of activist investing, and he's also going to give two picks.

First, he discussed Walgreens Boots Alliance and explained how his fund helped the company.

Now he's talking about Qualcomm, which he says has underperformed.

He recently disclosed a $2 billion stake in wireless technology developer giant Qualcomm, making it the fund's largest position. JANA is urging the company to spin off its chip business from its patent-licensing business. JANA also wants the company to cut costs and accelerate share repurchases.

"Our conversations with the company thus far have been very attractive."

More than 2,500 investors have gathered at Lincoln Center in New York City for the highly-anticipated 20th annual Ira Sohn Investment Conference where top hedge fund managers will share their investment views and picks for charity.

It's one of the must-attend hedge fund events of year. The lineup is staked with speakers like David Einhorn (Greenlight Capital), Leon Cooperman (Omega Advisors), Jeffrey Gundlach (DoubleLine), Larry Robbins (Glenview), David Tepper (Appaloosa), Bill Ackman (Pershing Square), and many more.