Updated from 1:57 p.m. EDT

Atlas America ( ATLS) was among the Nasdaq's winners Monday, as the drilling company's shares jumped 12% after it agreed to buy about $1.85 billion in natural gas assets from Anadarko ( APC).

"This purchase of Anadarko assets is the second major acquisition announcement for the Atlas companies in the last two weeks," Atlas said. As a result of the deal, Atlas now expects to distribute between $3.80 and $4 a share per limited partner during 2008. The deal is expected to close on or about July 11. Shares of Atlas America closed up $6.12 to $57.32. Anadarko shares were up $2.30, or 4.6%, to $51.95.

Krispy Kreme Doughnuts ( KKD) fell 6.7% after the doughnut chain posted a wider first-quarter loss. The company reported a loss of $7.4 million, or 12 cents a share, on revenue of $110.9 million. Results included a charge of $9.6 million and a credit of $14.9 million related to the settlement of class action litigation and a partial settlement of the shareholder derivative suit. Analysts polled by Thomson Financial expected a profit of 5 cents a share on revenue of $115.7 million. During the year-earlier period, the company posted a loss of $6 million, or 10 cents a share, on revenue of $119.4 million. Shares closed down 58 cents to $8.09.

Shares of Scholastic ( SCHL - Get Report) rose 12.3% after the publisher announced an accelerated stock buyback plan. The company agreed to purchase about $200 million from Deutsche Bank. Scholastic expects to repurchase about 14% of its outstanding shares. "Scholastic's strong balance sheet and free cash flow enable us to return capital to shareholders through this accretive share repurchase," the company said. Scholastic shares closed up $4 to $36.51.

Laureate Education ( LAUR - Get Report) rose 2.5% after the education company agreed to be acquired for an increased offer of $62 a share in cash. A buyout group led by the company's chairman had previously offered to buy the company for $60.50 a share in cash. The deal price represents a 26% premium over Laureate's closing price on Jan. 4, the day before Laureate's special committee disclosed that it was in talks with the group. Shares closed up $1.52 to $61.63.

Shares of Spartan Motors ( SPAR - Get Report) rose earlier in the day but closed down 3.2% after the maker of chassis and vehicles for the recreational vehicle, fire truck and ambulance markets announced a 3-for-2 stock split. The split is effective on June 28 to shareholders of record on June 14. "This stock split represents the Board's confidence in Spartan's strategy for growth over the next three to five years," the company said. "The market has rewarded our record results for 2006 and for the first quarter of 2007 with an appreciation in stock price, which is something we are thankful for," the company continued. Shares closed down $1.14 to $34.53.