Mario Gabelli acquired 6.2 Thousand Northwest Pipe shares worth $196 Thousand. That's 0.00% of their equity portfolio (757th largest holding). Mario Gabelli started to build up the position in Northwest Pipe in Q2 2007 and continued to invest until Q4 2007. Since then they sold 8.8 Thousand shares. The investor's estimated purchase price is $222 Thousand, resulting in a loss of 12%.