Clarke, Inc. (CLKFD: Pink Current) | Symbol Change Thu, Nov 19, 2020 12:00 - Clarke, Inc. ( CLKFD : Pink Current) - Symbol Change - The symbol, CLKFD, is no longer a valid symbol for Clarke, Inc.. As of Thu, Nov 19, 2020, the new trading symbol is CLKFF. You may find a complete list of symbol changes at otcmarkets.com .