shares of amprius technologies inc more than doubled before giving back some gains after the stock debuted on the new york stock exchange thursday at 1123 am et the stock was trading at 1595 up 77 earlier in the session the stock which opened at 901 touched a high of 2601 trading in the stock was halted several times thursday due to volatility amprius which trades under the symbol ampx said it develops and produces an ultrahigh energy density lithiumion battery for mobility applications on tuesday the company completed a business combination with special purpose acquisition company kensington capital acquisition corp iv