CEO adds to stake near 52-week highs.Thomas Shaw, President and CEO of Retractable Technologies (RVP), added 1,500 shares to his stake recently. Shaw owns over 18.7 million shares of the company, making the increase in his total holdings a modest one.Shaw is a frequent buyer of shares in small lots—likely just enough to ensure the small-cap company’s shares don’t move wildly, and he has been buying shares as they have continued to move higher in the past few months.