Who/what is ‘GV 2021 GP, L.L.C’ who recently sold/bought $GOOG at around $35 this month?

Hello

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I noticed them on finviz.com (https://finviz.com/quote.ashx?t=GOOG&p=d).

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Under Insider Trading, you can see they BOTH bought and sold at around $35 for Google and I am confused why and how they did it. I also checked on the SEC Form 4 but there was no indication on option exercise either so it just doesn't make sense to me.

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Is this just an agree transaction between two friendly parties?