Shares of Cempra (CEMP) were down 12% to $3.70 in premarket trading on Tuesday. The Chapel Hill, N.C.-based company, which focuses on developing antibiotics, reported a fourth-quarter net loss of 60 cents per share, compared with a net loss of 48 cents per share in the year-ago period. Revenue was $7.95 million, compared to $5.79 million in the same period last year.

Novavax (NVAX) shares were down 9.8% to $1.47. The Gaithersburg, Md.-based vaccine company after the market close on Monday reported a fourth-quarter net loss of 21 cents a share versus a net loss of 29 cents a share a year ago. Revenue for the quarter declined 8% year-over-year to $5.4 million.

Among the other stock movers was Ionis Pharmaceuticals (IONS) , whose shares rose 4.5% to $49. The Carlsbad, Calif.-based company reported fourth-quarter GAAP net income of $25.9 million, compared with a net loss of $71.4 million in the year-ago period. Revenue was $160.3 million, compared with $51.6 million in the fourth quarter of 2015.

Meanwhile, Amarin's (AMRN) American depository receipts were up 4.1% to $3.57 after the Dublin, Ireland-based company announced its latest numbers. Amarin, which focuses on the commercialization and development of therapeutics to improve cardiovascular health, reported a fourth-quarter net loss applicable to common shareholders of $27.5 million, or basic and diluted loss per share of 10 cents. In the same period last year, it reported a net loss applicable to common shareholders of $21.9 million, or basic and diluted loss per share of 12 cents. Total revenue for the fourth quarter of 2016 was $38.7 million, up 45% year-over-year.

More from Health

How to Invest in Cannabis - In Its Many Forms

How to Invest in Cannabis - In Its Many Forms

Is CBD Oil Legal? State-By-State and Future Legality

Is CBD Oil Legal? State-By-State and Future Legality

Unilever Taps In-House Executive as CEO

Unilever Taps In-House Executive as CEO

Open Enrollment Means Costly Changes for Some Medicare Advantage Beneficiaries

Open Enrollment Means Costly Changes for Some Medicare Advantage Beneficiaries

How Much Do Doctors Make in 2018?

How Much Do Doctors Make in 2018?