Five funds raised more than $1bn to back biotech firms; Arcus leads recent VC rounds with $107m GV-backed Series C; Celgene, Valeant sell notes to retire debt; and Alnylam cashes in on investor goodwill.

Amunix’s XTEN technology for half-life extension and precise drug delivery has been used by multiple partners over the past 15 years, but now the firm is building its own cancer therapy pipeline.

Private Company Edition: Clover’s $230m financing was the largest of recent mega-rounds. Century Therapeutics ($160m), Vividion ($135m) and eGenesis ($125m) also raised big rounds and investors Foresite Capital ($969m), Sofinnova Partners ($540m) and OMX Ventures ($150m) raised new VC funds.