20 years of paper company acquisitions

Ahh, the days of paper companies. With the 20th anniversary of the UniSource paper show in Chicago, the AIGA is releasing several posters. One of the posters outlines all the paper company acquisitions in the past 20 years. It's a good way to get back into knowing what happened to all the brands we were familiar with. To read the text in this poster, view the full-size version.

UPDATE: This diagram is from 2009. Has anything new happened since 2009?