Check out which companies are making headlines after the bell Monday:
Giga-tronics - The provider of electronic instruments reported a fourth-quarter loss of $1.27 million, with its shares falling sharply in after-hours trading.
Micron Technology - The maker of semiconductor devices posted third-quarter earnings per share of 79 cents, excluding items, on $3.98 billion in revenue. Analysts had expected EPS of 70 cents on $3.89 billion in sales. Shares gained in after-hours trading.
Molson Coors Brewing - Morgan Stanley upgraded the brewer to equal-weight from underweight. Shares rose in after-hours trading.