One way you can target people of a company is by using the dating app inside a virtual Android device. Then use a VPN to get an IP in their geographic area and set the GPS to be dead set inside the building of say Johnson and Johnson head quarters. There are a few dating apps which rely on close vicinity, some fitness and chat apps supposedly too. Those apps will then list people's profiles within range aka inside their campus. After that it takes very little effort to find those profiles matching other social media accounts. People are creatures of habit, use same username, avatar or picture, etc.