They're hinting at a change of control and may make a move on the Company. They own less than 5% (i.e. 4.5%), yet they file the 13D to make a statement that they plan to influence management. This could be a prelude to a takeover. Notice how PCC share price went up significantly after they went ex-dividend. Normally, a stock would drop after going ex-divident. This is due to their 13D Filing.