Netcraft recently released a report showing the growth of Extended Validation (EV) SSL certificate market share over the last four years. EV SSL certificates account for only 2.3 percent of all third party-issued certificates according to the Netcraft SSL survey. Organization Validated (OV) and Domain Validated (DV) SSL certificates took up the share of the rest of the market.
The big news is EV is much more prevalent on high-traffic and financial websites. These are the type of sites that are more likely to be duplicated in phishing attacks. When the Netcraft survey was restricted to the busiest 1,000 websites, they found 81 supported HTTPS with a valid SSL certificate. Of those, nearly 33 percent used EV; the majority of the rest were OV.
Here is a Netcraft chart showing the distribution of certificate types over websites by traffic rank.
The data shows that although OV certificates clearly dominate the top 1 million sites, EV certificates are playing a significant role where it counts.
For a primer on the business value of EV, see Protecting Your Brand & Customers by Microsoft.