Stocks making the biggest moves midday: Regeneron, Dominion, Mobileye, Viking and more

Check out the companies making the biggest moves in midday trading: Dominion Energy — Shares popped more than 9% after NextEra Energy announced a deal to acquire the company in an all-stock transaction. NextEra said the combination of the two companies will create the world's largest regulated electric utility business. NextEra shares were down about 5%. Viking Holdings — The cruise line's stock rose nearly 2% after receiving an upgrade from Wells Fargo to overweight. …