Cerus (NSDQ:CERS) said today it closed a $57.5 million public offering, including the sale of additional shares as part of an underwriter’s option.

The Concord, Calif.-based company said that the $57.5 million in proceeds does not include the deduction of offering expenses, and did not state how it plans to spend funds raised in the offering.

BTIG LLC acted as the sole book-running manager for the offering, according to a press release.

Last August, Cerus inked a $40 million amended growth capital credit facility with Oxford Finance. The company received a $30 million loan from the nation 21 agency when it closed the deal and can draw another $10 million contingent upon a specified sales milestone.