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Four biotechnology companies were looking to raise a combined $303.9 million starting on Thursday as they announced Wednesday the pricings of their initial public offerings.

The companies – NextCure, Milestone Pharmaceuticals, Cortexyme and Axcella Health – all said Wednesday that they would begin trading on the Nasdaq Thursday, with their offerings expected to close Monday. BioPharmCatalyst, a biotech and healthcare investor website, had listed the companies as expected to begin trading Wednesday.