I Googled "Warrant Expiry Date" and seem to have opened a long list of announcements by various companies indicating that they have applied to the (in most cases) Toronto Venture Exchange for an extension of the warrant expiry date. Two years seems quite common as does the indication that the companies involved are in the mining business. I didn't open many of these to research the details but it would appear that this avenue is open AUM should they choose to pursue it. One of the first companies on the list is "Golden Tag" and they extended a warrant for two years. The two years ended two days ago and I doubt that the extension was of any benefit to the warrant holders.