The answer is that this is not a shelf registration in the usual sense that we encounter with loss-making biotech companies; rather, GILD’s bond issue is being made under a so-called automatic shelf registration (ASR) filed on Form S-3ASR:
Do you know off hand how big their shelf is? I would speculate on ITMN or VRUS.
VRUS already sports a $2.5B market cap. What is your guesstimate on take-out valuation and, even with this offering, would GILD be able to comfortably stomach that kind of acquisition?