With U.S. stock futures trading mixed this morning on Monday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Constellation Energy Corporation (NASDAQ:CEG) to report quarterly earnings at $2.64 per share on revenue of $5.71 billion before the opening bell, according to data from Benzinga Pro. Constellation Energy shares fell 5.5% to $243.99 in after-hours trading.Analysts expect Marriott International, Inc. (NASDAQ:MAR) to post quarterly earnings at $2.31 per share on revenue of $6.27 billion. The company will release earnings before the markets open. …