Mario Gabelli acquired 473 Thousand Tenneco shares worth $7.57 Million. That's 0.08% of their equity portfolio (257th largest holding). The first Tenneco trade was made in Q1 2001. Since then Mario Gabelli bought shares 24 more times and sold shares on 57 occasions. The stake costed the investor $4.93 Million, netting the investor a gain of 54% so far.