Steve Bronson, chief executive of Qualstar Inc., has purchased more than 85,000 shares of the company’s stock in the last two weeks, pushing up his stake to more than 21 percent of outstanding shares, according to a filing with the Securities and Exchange Commission on Friday. The Simi Valley company, which makes tape storage equipment and power supplies for computer systems, was the subject of a takeover battle last year between previous management and Bronson, the company’s second-largest shareholder. In June, shareholders voted in a new board and put in Bronson as chief executive. Bronson holds most of the shares through Boca Raton, Fla. investment firm BKF Capital Group Inc., a publicly traded investment firm he controls. He holds a few shares through BA Value Investors LLC, another company he controls. Together, the companies own more than 2.6 million shares of Qualstar. Shares closed up 3 cents, or 3 percent, to $1.20 in trading on the Nasdaq. United Online has hired Gail Shulman general counsel and executive vice president, the company announced on Friday. The Woodland Hills company, which publishes web sites and provide Internet services, spun off its FTD.com site in November. The remaining company publishes the Classmates.com and MyPoints.com sites. Shulman previously served as MIPS Technologies Inc., a semiconductor company that was acquired in February 2013. At MIPS, Shulman worked on acquisitions, intellectual property and contracts. Before MIPS, Shulman worked for Axil Computer, a subsidiary of Hyundai Electronics, where she established the legal department. Shares closed down 20 cents, or 1.5 percent, to $13.40 on the Nasdaq. Ryland Group Inc. announced this week that it has opened a residential development in Georgia. The Carrington model at Cedar Park in Milton, a neighborhood about 30 miles from Atlanta, features single-family homes starting around $500,000. The community offers eight floor plans ranging from 3,427 to 5,153 square feet. The newly released Carrington model features a two-story foyer, walk-in pantry and a threee-car garage. All five bedrooms feature their own private baths. Shares closed up 14 cents, or a fraction of a percent, to $42.84 on the New York Stock Exchange.