A.M. Pappas & Associates, of Research Triangle Park, N.C., named Santo Costa its first executive-in-residence.

Abgenix Inc., of Fremont, Calif., appointed Bruce Keyt vice president, preclinical development.

Abingworth Management, of London, appointed Stephen Bunting managing director of Abingworth Management Ltd. and said David Quysner will become nonexecutive chairman at the end of 2001.

AGY Therapeutics Inc., of South San Francisco, appointed Roman Urfer vice president of drug discovery and development.

Akorn Inc., of Buffalo Grove, Ill., appointed Ben Pothast vice president of finance and chief financial officer.

Alpharma Inc., of Fort Lee, N.J., named George Rose vice president, human resources and communications.

Anadys Pharmaceuticals Inc., of San Diego, appointed Michael Kamdar vice president of corporate development and strategy, Mary Yaroshevsky-Glanville director of human capital, Stephen Webber director of medicinal chemistry and Vlad Gregor associate director of high-throughput medicinal chemistry.

Applied Molecular Evolution Inc., of San Diego, appointed Stanley Crooke to its board.

Aviron Inc., of Mountain View, Calif., named Luc Hermans vice president and UK site director.