Stocks on the move Monday

NEW YORK (CNNMoney.com) -- The following shares were among the most actively traded Monday:

Akzo Nobel (up $9.69 to $70.50, Charts) said it was selling its drugs unit Organon BioSciences to Schering-Plough for $14.4 billion, in a last-minute reversal of plans to float it on the stock market.

Anadarko (down $0.39 to $40.27, Charts) said on Monday it would sell part of its stake in the K2 Unit offshore field in the Gulf of Mexico for $1.2 billion to two unnamed parties.

Dollar General (up $4.38 to $21.16, Charts) announced it's agreed to be acquired by private equity firm Kohlberg Kravis Roberts & Co. L.P. in a deal valued at $7.3 billion, including approximately $380 million of debt.

Express Scripts (up $3.87 to $80.94, Charts) said its nearly $27 billion bid for Caremark represented its "best and only" offer unless rival benefits manager opened its financial records for review.

Ford (down $0.05 to $7.88, Charts) said it would sell its Aston Martin luxury car business to the founder of an auto racing company and other investors in a deal valued at $925 million.

UnitedHealth Group, the No. 2 health insurer in the U.S., announced plans to buy Sierra Health Services (up $5.65 to $41.55, Charts) in an all-cash deal valued at $2.6 billion.

Barrons reported in its weekend edition that Chicago real estate magnate Sam Zell is proposing a $13 billion deal to take the Tribune (down $0.27 to $30.28, Charts) and broadcaster private through use of an employee stock ownership plan.

Take-Two (down $0.50 to $19.77, Charts) reported a net loss for the first quarter ended on Jan. 31 of $21.5 million, or 30 cents per share, disappointing investors.

-- from staff and wire reports

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