Plug Plug Power Inc. CEO Andrew Marsh (shown center, with board chairman George McNamee to the left) presided over the closing bell at the Nasdaq Stock Market this afternoon in New York City. Plug, which makes fuel cells for cellphone towers and for use in fork lifts,  will hold its annual shareholdersâ meeting tomorrow morning in New York at the Nasdaq offices. Being an electronic market, the closing bell at the Nasdaq is largely symbolic.