Lately, activist investors are using the market's decline as a competitive opportunity to establish large positions in equities that they believe are undervalued.

Here are some of the latest activist investments recently filed with the Security and Exchange Commission.

Stephens Investments Holdings has entered into an agreement with Cost Plus ( CPWM), which will allow the investment vehicle to increase its ownership to 19.9% without triggering Cost Plus's poison pill.

To read more, visit Stockpickr.com.

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