Portolan Capital Management LLC increased its holdings in Materion Co. (NYSE:MTRN – Free Report) by 94.5% during the 2nd quarter, HoldingsChannel reports. The firm owned 48,707 shares of the basic materials company’s stock after buying an additional 23,659 shares during the period. Portolan Capital Management LLC’s holdings in Materion were worth $5,562,000 at the end […]