Shares of Arcus Biosciences, Inc. (RCUS) - Get Report soared in late trading Wednesday after a report that Gilead Sciences, Inc. (GILD) - Get Report is in talks to acquire a stake in the cancer therapy researcher.
Gilead is contemplating taking a stake and potential development pacts, Bloomberg reported, citing unnamed sources.
Shares of Arcus rose $7.42, or 48%, to $23 in after-hours trading.
Gilead shares edged up 19 cents, or 0.25%, to $74.63.
Elsewhere, shares of companies known to be pursuing coronavirus treatments were mixed Wednesday.
Among notable coronavirus stocks, nine rose while 21 fell.
Vaxart (VXRT) - Get Report shares rose 29 cents, or 16.57%, to $2.04. Vaxart is in preclinical stages of development of an oral vaccine. It is planning Phase 1 clinical trials sometime in the second half of the year.
Kiniksa (KNSA) - Get Report shares rose 46 cents, or 2.68%, to $17.61. Kiniksa says it has seen positive preliminary results from its mavrilimumab monoclonal antibody in patients suffering from COVID-19.
Among coronavirus stocks lagging Wednesday, BioNTech (BNTX) - Get Report ADRs fell $3.05, or 7.33%, to $38.58. BioNTech is moving to start clinical trials of its potential COVID-19 vaccine later this month. It is working with Pfizer (PFE) - Get Report on development and distribution.
Dynavax (DVAX) - Get Report shares fell 17 cents, or 5.23%, to $3.08. Dynavax is working with the Coalition for Epidemic Preparedness Innovations to give companies access to its adjuvant technology which can boost vaccine effectiveness.
CytoDyn CYDY, which trades over the counter saw its shares fall 11 cents, or 4.38%, to $2.40. CytoDyn is moving into Phase 2 trials of an experimental drug called leronlimab to treat respiratory complications in patients with COVID-19.
In the broader markets, the S&P 500 index fell 62.70 points, or 2.2%, to 2,783.36.The Nasdaq Composite Index fell 122.56 points, or 1.44%, to 8,393.18.
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