With the market collapsing, you might have missed this. Redfin $RDFN is reportedly set to be otentially acquired, with its stock up 67% today. But it looks like somone knew beforehand. On Feb 24-25, $RDFN receives a flurry of call buying (the most amount of options activity it received by 4x over the last thirty days), for the $8 ITM calls expirying March 21st. You can see the blue jump in the first image, top right quadrant. These traders have held their position, and are up +100% from the trade. I missed this trade in my own filters, due to it being ITM at the time and a name thinly traded. Unusual.