Again as Peter Lynch famously said "the are many reasons insiders sell shares but only one reason they buy, they feel the price is going up".
Company and amount of insider purchases:
Jeffries Group (JEF) = $9,821,000
Gatehouse Media (GHS) = $6,605,000
Thornburg Mortgage (TMA) = $5,997,000
Allied Nevada Gold (ANV) = $5,614,000
Western Alliance Bancorporation (WAL) = $3,433,000