Stocks making the biggest premarket moves: Shake Shack, Charles Schwab, H&R Block, DuPont and more
Sopa Images | Lightrocket | Getty Images Check out the companies making the biggest moves in premarket trading: Shake Shack – The fast food chain saw its stock gain nearly 4% after the Wall Street Journal reported that activist investor Engaged Capital is planning a proxy fight for three board seats at the company. Engaged…