Check out which companies are making headlines before the bell:
Men's Wearhouse, Jos. A. Bank–The two clothing retailers have entered into a non-disclosure agreement, under which they will exchange certain confidential information. Last week, Jos. A. Bank rejected a $63.50 per share takeover bid, but said it would be willing to engage in talks about a higher offer.
Darden Restaurants–The restaurant chain is making an investor presentation focusing on increasing shareholder value this morning, and is still planning to spin off its Red Lobster chain despite calls from a major shareholder to delay that move.
Berkshire Hathaway–Warren Buffett's company reported record profit in its latest annual letter to shareholders. Buffett will appear on this morning's edition of Squawk Box until 9 a.m. Eastern, giving his thoughts on both his company and the overall market outlook, as well as answering viewer questions.