Overview of Chuck Royce (Trades, Portfolio)'s Latest Portfolio Addition The investment firm led by Charles M. Royce has recently expanded its portfolio with the addition of Northwest Pipe Co (NASDAQ:NWPX). On December 31, 2023, the firm acquired 4979 shares of the company, which specializes in water-related infrastructure products. This transaction has increased the firm's total holdings in Northwest Pipe Co to 920,534 shares, representing a 0.28% position in the portfolio and a 9.19% ownership of the traded stock.