NEW YORK (CNN/Money) - Shares of leading dairy products company Dean Foods rose Monday on the news the company completed its merger with rival Suiza Foods.
Biotechnology firm Affymetrix gained after the company announced it had settled all patent infringement suits with genomic technology firm Incyte Genomics.
Pharmaceutical firm Schering-Plough moved up after the company received FDA approval for Clarinex, the successor to its allergy pill Claritin.
But Internet security firm WatchGuard Technologies slipped after the company warned of a wider-than-estimated loss for its fiscal fourth quarter.
Monday's winners
Dean Foods (DF: up $1.70 to $68.50, Research, Estimates). Suiza Foods (SZA: Research, Estimates), one of the largest U.S. dairy companies, said it completed its merger with rival Dean Foods to create the nation's leading processor and distributor of fresh milk and other dairy products. The combined company, which will be called Dean Foods, will have about $10 billion in annual revenues, the companies said in a joint statement, and will trade under the symbol "DF" on the New York Stock Exchange, effective Monday.
Affymetrix (AFFX: up $2.17 to $36.99, Research, Estimates); Incyte Genomics (INCY: down $0.55 to $20.67, Research, Estimates). The two genomic technology firms said Friday they settled all patent infringement suits between them and will cross-license each other's intellectual property. Financial terms of the settlement were undisclosed.
Schering-Plough (SGP: up $0.76 to $37.11, Research, Estimates). The drugmaker on Friday won long-awaited U.S. approval for Clarinex, the successor to its blockbuster allergy pill Claritin, but said it may have to pay up to $500 million to resolve plant problems. The drugmaker also warned about its fourth-quarter earnings and said it may have to pay up to $500 million to regulators to settle quality-control issues at its New Jersey and Puerto Rico plants.
Sepracor (SEPR: up $3.10 to $56.65, Research, Estimates). Deutsche Banc Alex. Brown upgraded the research-based pharmaceutical company to "strong buy" from "buy," citing the FDA's approval of Schering-Plough's Clarinex. Sepracor, which shares a licensing agreement with Schering-Plough, is expected to pay $30 million in royalties upon the launch of Clarinex in the U.S.
InVision Technologies (INVN: up $4.21 to $32.72, Research, Estimates), Magal Security Systems (MAGS: up $1.21 to $13.21, Research, Estimates). InVision, a maker of bomb-detection gear bounced higher following news Saturday that sneakers worn by a passenger on a trans-Atlantic flight from Paris to Miami contained "two functional improvised explosive devices," federal authorities said Sunday. The news also elevated shares of Magal Security, which manufactures computerized security systems.
Monday's losers
Adolph Coors (RKY: down $2.98 to $56.29, Research, Estimates). The third-largest U.S. brewer agreed to buy Interbrew's Carling business for $1.7 billion. The acquisition gives Coors, the maker of Coors Light, Blue Moon Belgian White Ale and George Killian's Irish Red Lager, access to the U.K. beer market, one of the world's biggest.
WatchGuard Technologies (WGRD: down $3.24 to $6.95, Research, Estimates). The Internet security company said Friday it expects its fourth-quarter loss to be wider than previously forecast, citing an unanticipated shortfall in sales.
Delta Air Lines (DAL: down $0.77 to $28.20, Research, Estimates). The No. 3 U.S. air carrier warned in a Securities and Exchange Commission filing Friday that it will post a larger-than-expected fourth-quarter loss. 
--from staff and wire reports
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