 Charles Schwab Investment Management Inc. boosted its holdings in shares of Nektar Therapeutics NASDAQ:NKTR by 11.0 during the 2nd quarter, according to its most recent 13F filing with the SEC. The fund owned 928,597 shares of the biopharmaceutical companys stock after purchasing an additional 91,885 shares during the period. Charles Schwab Investment Management Inc. owned ... 