IPv4 depletion began oficially in the European region as of September 14th 2012, when RIPE NCC* started to allocate IPs from the last /8
* RIPE NCC = Reseaux IP Europeens Network Coordination Centre - the organisation that administrates IP resources for the European region

The solution would have been massive IPv6 deployment which unfortunately didn't happen. Therefore we need to be able to live with IPv4 for several more years.
This need led to the apparition of a new market. The IPv4 transfers market.

We have global presence but focus mainly on the RIPE region, being headquartered in London, UK

In any moment of decision the best thing you can do is the right thing, then next best thing is the wrong thing and the worst thing you can do is nothing. (Theodore Roosevelt)
RIPE's IPv4 Exhaustion page
Google's IPv6 statistics
IPv6 - Wikipedia

We are mainly a consulting company so the first thing we do is help our customers understand the options, the evolution and the difference in approaching this scarcity of resources.