  |  | Wall St. ends flat, S&P edges up to record high | (Reuters) - U.S. stocks ended little changed in thin trading on Monday and the S&P 500 notched its latest record high, but gains were curbed when an early rally in energy prices lost momentum. | |  |   |  | Burger chain Shake Shack files for IPO | (Reuters) - Burger chain Shake Shack Inc, which grew out of a hot dog stand in New York's Madison Square Park, has filed for an initial public offering at a time when stock offerings by casual restaurants have proven to be a big hit with investors. | |  | |   |  | Icahn acquires stake in Manitowoc, seeks splitup | (Reuters) - Carl Icahn reported a 7.7 percent stake in Manitowoc Co Inc , and became the second activist investor this year to push for a splitup of the company's crane and foodservice equipment businesses. | |  | |   |  | AirAsia has little margin for error in crisis over missing jet | KUALA LUMPUR/SINGAPORE (Reuters) - As AirAsia Bhd grapples with its first airliner disaster since its founding a dozen years ago, Asia's biggest budget carrier will have little margin for error given tough competition and thin profits in the sector. | |  | |  |  |  | A daily digest of breaking business news, coverage of the US economy, major corporate news and the financial markets. Register Today | | |  | |  |  | The latest Reuters articles on M&A, IPOs, private equity, hedge funds and regulatory updates delivered to your inbox each day. Register Today | | |  | | » MORE NEWSLETTERS | |