Legislative, Regulatory & Legal

New York City -- Activist investor Bill Ackman’s Pershing Square Capital Management raised its stake in Borders Group from 31.5% to 37.3% and is prepared to finance an offer by Borders to buy larger rival Barnes & Noble, according to a filing with the Securities and Exchange Commission Monday.

According to the statement, Ackman is prepared to finance an offer by Borders to buy all of Barnes & Noble’s stock in an all-cash transaction valued at $16 per share, which would amount to about $960 million, based on the shares outstanding.

New York City -- Wal-Mart Stores has filed suit against CVS Caremark Corp. to prevent CVS from hiring former Wal-Mart executive Hank Mullany, according to a Friday report by Bloomberg.

CVS’s hiring of Mullany, former president of Wal-Mart’s northern U.S. division, would violate a noncompete agreement, Wal-Mart said in the complaint filed Thursday in Delaware Chancery Court.

According to Wal-Mart’s complaint, CVS has indicated that it intends to hire Mullany without regard to the agreement.

Tokyo - A report released Tuesday said that Japanese prosecutors will launch an investigation into possible insider trading involving shares of Wal-Mart's Japanese subsidiary Seiyu.

According to Reuters, which cited the Nikkei business daily website, the trading is suspected to have occurred when Wal-Mart turned Seiyu into a fully owned unit in 2007.

In early November, Japan's Securities and Exchange Surveillance Commission began an investigation into possible insider trading. Wal-Mart has said it would cooperate with authorities.

Hartford, Conn. -- Connecticut environmental regulators on Tuesday said that CVS has agreed to pay a nearly $269,000 penalty to settle allegations that the chain's drug stores improperly disposed of photo processing and pharmaceutical wastewater.

The state Department of Environmental Protection announced that dozens of the chain's Connecticut stores this year and last year discharged photo-processing chemicals into onsite septic systems or sanitary sewers without permits.

Bentonville, Ark.

Bentonville, Ark. -- Wal-Mart Stores said Thursday it will open its first four stores in Washington, D.C., as part of the retailer’s effort to increase its urban expansion stride.

Wal-Mart said it plans to open the smaller-format urban stores in Washington, D.C. in late 2012, and said it has met little resistance from the area. The retailer said its poll of 800 locals found nearly three-quarters of Washingtonians favored Wal-Mart coming to the city.