To: All Persons or Entities who purchased RPX Corporation (“RPX” or the “Company”) (NASDAQGS: RPXC) stock prior to May 1, 2018. You are hereby notified that Levi & Korsinsky has commenced an investigation into the fairness of the RPX merger. RPX will merge with HGGC for $10.50 per share. To learn more about the RPX merger and your rights, go to: http://www.zlk.com/mna/rpx-corporation or contact Joseph E. Levi, Esq. either via email at jlevi@levikorsinsky.com or by telephone at (212) 363-7500, toll-free: (877) 363-5972. There is no cost or obligation to you.

The investigation concerns whether the Board of RPX breached their fiduciary duties to stockholders by failing to adequately shop the Company before agreeing to enter into this transaction, and whether HGGC is underpaying for RPX shares, thus unlawfully harming RPX shareholders. In particular, at least one analyst set a price target of $16.00 per share.

Levi & Korsinsky is a national firm with offices in New York, Connecticut, California, and Washington D.C. The firm’s attorneys have extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities lawsuits and have recovered hundreds of millions of dollars for aggrieved shareholders. For more information, please feel free to contact any of the attorneys listed below. Attorney advertising. Prior results do not guarantee similar outcomes.