Benchmark Capital Partners was an early investor and received shares when Finjan went public. They are considered an "insider" and file Form 4s. Just a partnership of a couple people that made a venture capital investment and it is time to move on. They have been selling small amounts regardless of where the price is.
They do hold their annual meeting in CA in June along with attending multiple investor conferences. Use the Investors link on their website to see upcoming events or use this link:
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