Yahoo, under Marissa Mayer, is no stranger to acquisitions. The company is among the busier players when it comes to snapping up startups, but sometimes they also make bigger purchases. A few years ago, Yahoo bought Tumblr for around $1 billion, and they’re reportedly eyeing a similarly sized acquisition. Reports now indicate Yahoo is interested in Foursquare, which recently split in two to comprise a two-pronged attack for finding places to go and checking in. The deal is said to be worth around $900 million.