The current institutional shareholding score of Columbia Banking System Inc is 10.00, ranking 1 out of 399 in the Banking Services industry. The latest institutional shareholding proportion is 102.59%, representing a quarter-over-quarter increase of 32.73%. The largest institutional shareholder is ETHSX, holding a total of 2.76M shares, representing 1.03% of shares outstanding, with 31112.12% increase in holdings.