Companies / Industry directory / Materials & Chemicals Paperboard Mills 1 stock in Materials & Chemicals · SIC 2631. Company snapshot 2026-10-09 · Calculated market cap as of 2026-10-02 · USD Find a company or ticker Stocks in Paperboard Mills. Sorted by market cap, largest first. Ticker Company Market Cap Revenue (TTM) Net Income (TTM) CLW Clearwater Paper Corp $313.69M $1.54BTTM ended 2026-03-31 −$25.10MTTM ended 2026-03-31 No matching companies.