Vertex Pharmaceuticals Inc. /zigman2/quotes/202259802/composite VRTX -2.42% shares rose in the extended session Thursday after the biotech drug maker's results and forecast topped Wall Street estimates. Vertex shares rose 2.9% after hours, following a 0.9% decline in the regular session to close at $230.31. The company reported fourth-quarter net income of $583.2 million, or $2.23 a share, compared with $1.55 billion, or $5.97 a share, in the year-ago period. Adjusted earnings were $1.70 a share versus $1.30 a share in the year-ago period. Revenue rose to $1.41 billion from $870.1 million in the year-ago quarter. Analysts surveyed by FactSet had forecast earnings of $1.21 a share on revenue of $1.01 billion. Vertex expects "total product" revenue of $5.1 billion to $5.3 billion in 2020, while analysts had forecast on revenue of $4.88 billion.