RPXC

Rpx Corporation

A defensive patent aggregator that buys up patents so they can't be used to sue its member companies. Founded in 2008 by three entrepreneurs as the "Rational Patent EXchange," it uses a subscription model to pool members' money and purchase risky patent assets, protecting clients from "patent trolls." Its unusual promise: it has committed to never assert its own patents or file infringement suits against anyone.

No Schedule 13D or 13G filings recorded.