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NEW YORK ( TheStreet) -- GlaxoSmithKline (NYSE: GSK) hit a new 52-week high Monday as it is currently trading at $45.40, above its previous 52-week high of $45.34 with 1.3 million shares traded as of 11:15 a.m. ET. Average volume has been 3.6 million shares over the past 30 days. GlaxoSmithKline has a market cap of $113.5 billion and is part of the health care sector and drugs industry. Shares are up 14.1% year to date as of the close of trading on Friday. GlaxoSmithKline plc, together with its subsidiaries, engages in the discovery, development, manufacture, and marketing of pharmaceutical products, over the counter (OTC) medicines, and health-related consumer products worldwide. The company has a P/E ratio of 45.3, above the average drugs industry P/E ratio of 22.4 and above the S&P 500 P/E ratio of 17.7.