SPNGQ no longer exists as a stock. You may have something in your account, but it doesn't appear to be something that can be traded. The best course of action, IMO, is to either simply declare it worthless, or there is a form to fill out with your broker to remove the stock from your account. There is no chance of any real return on investment at this point. I had this happen with one of my stocks, as the symbol was gone, but there was just a numbered entry in my statements.
SPNG does have other meanings now, it's an indi music label, it can be microsoft open source security message thing, or Southern Pacific Narrow Gauge railroad modeling. However, none of these have anything to do with Spongetech Delivery Systems. So, given this google search, there isn't much to consider with this stock.
I suppose as a holder or former holder of this stock, there are still legal actions to take against the owners of the company, but at this point, I'm not sure if there is any more restitution possible.
Good luck.
D
