It's definitely a broad action to deregister shares. It doesn't target a specific offering, stock option plan or anything like that because unsold shares from both Fife notes and Paulson raises are included.

Whether that portends something earthshaking or just relatively mundane housecleaning...there seem to be myriad reasons for deregistering unsold shares. Here's an EDGAR search for those terms if anyone is interested:

https://www.sec.gov/edgar/search/#/q=deregist...amp;page=2