Mario Gabelli acquired 355 Thousand Northwest Natural Holding shares worth $15.5 Million. That's 0.17% of their equity portfolio (153rd largest holding). The first Northwest Natural Holding trade was made in Q4 2018. Since then Mario Gabelli bought shares eight more times and sold shares on one occasions. The stake costed the investor $14.4 Million, netting the investor a gain of 7.2% so far.