Where did you get this information? The DVAX web site does not have it. The last form filed was a Form 13a for a change in beneficial ownership resulting when limited partnerships, both owning, merged.
Sorry, but I don't believe that this is true, look at http://www.nasdaq.com/symbol/dvax/sec-filings#.USj8S6WTxnE, there has been no form 15 filing. I hope that its true though since I'm long, regardless though if we get approved we should make some money.