Here is an interesting place to start:

http://www.deepcapture.com/category/data/

Bottom line, there are numerous ways to naked short and much if not most of the data never sees FTD data websites. Therefore, we cannot know if there are significant naked shares out there not yet covered (affecting any company).

Once again: It is not possible to draw a conclusion either way as to whether or not Silverado is naked shorted. So IMHO, everyone here needs to focus on Silverado performing, and forget about shorting. If it is happening, it's a bonus, nothing more.