This is exactly why I got out of Interdigital Communications: https://ih.advfn.com/stock-market/NASDAQ/interdigital-inc-IDCC/stock-news/79123948/statement-of-changes-in-beneficial-ownership-4 Free Shares! Extremely large amounts of Form 4 sells versus buys by insiders in the last 10 years. This stock has been manipulated by the Market Makers for far too long! Way more sells than buys! Insider Manipulation at it's best too!