Grubhub, Casper Sleep, BlackRock, Datadog and more

Grubhub, Casper Sleep, BlackRock, Datadog and more

Jin Lee | Bloomberg | Getty Images Check out the companies making headlines in midday trading.  GrubHub, Uber — Grubhub shares soared more than 27% on news that ride-hailing company Uber has approached the company with a takeover bid. Uber’s offer comes months...