Walgreen Co.

San Francisco -- A report Monday by Associated Press said that Walgreen Co., McDonald's and Twitter each reported unrelated security breaches, involving customer e-mail addresses and other private information.

Walgreen said hackers who gained access to a list of customer e-mail addresses may have sent spam directing customers to enter personal data into outside websites.

New York City -- Walgreens on Friday reported that its same-store sales rose 3.2% in November. The drugstore operator’s total sales rose 8.6% to $5.83 billion. (Duane Reade stores, acquired in April 2010, contributed 2.8% points to the total sales increase for the month. But those stores are not included in the same-store sales report.)

Meanwhile, Rite Aid Corp. reported that its November same-store sales fell 1.3% due to the introduction of new generic drugs and a decline in prescriptions resulting partly from a milder flu season.

Deerfield, Ill. -- Walgreen Co. said late Wednesday it is recommending that shareholders do not endorse an unsolicited offer from TRC Capital Corp. to buy up to 3 million shares of the drugstore chain.

The retailer said it received an offer from TRC on Nov. 3. The offer represents 0.3% of Walgreen’s outstanding stock.

Walgreen said it doesn't endorse the "mini-tender offer," because it is set at a price below the current market price for the company's shares and is subject to numerous conditions.