Houston American Energy Corp (HUSA)

[Corvette1]

He's the only one and if you look at the filings it was margin calls. He's been selling stock in a lot of companies too, filings will show that as well.

http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001071405



Check the green note
Explanation of Responses:
1. Pledged shares sold pursuant to margin requirements of lender.


http://www.sec.gov/Archives/edgar/data/1071405/000107140512000043/xslF345X03/primary_doc.xml