There is only 31 million in the float.
Both Houser and Walker have been buying on the open market . I tried adding up all the institutions holders and get about 17-18 million shares. I'm sure it is higher than that.
I'm guessing between the two of them they owe between 5-7 million shares. I tried looking in the proxy, but could not find the amount of shares.
Yahoo shows 182,292 shares (walker), 185,257 (houser) and 172, 232 (mercer) as of mid-year. Between April and June of this year, walker bought 21,200 shares in the $47.50-$59.02 range. By mid-June, houser bought around 44,875 shares.