Editor's Note: In this feature from Stockpickr, we highlight lists of stocks that have made new highs, lows or seen other unusual activity.52-Week Lows: As the homebuilder sector continues to take a beating, Beazer Homes ( BZH) sank 9% to a 52-week low Thursday after it fired its chief accounting officer amid suspicious activity. Shares fell $2.73 to $25.81. Biggest % Losers: Chip designer LSI ( LSI) fell 12% Thursday after it reduced second-quarter guidance and said it would cut nearly 900 jobs. The job cuts are intended to reduce operating expenses. "The steps we are taking today are designed to accelerate the synergies from the merger and further improve our cost structure," the company explained. "As a result, we will be better positioned to increase operating income and create shareholder value." The stock fell 99 cents, landing at $7.65. 52-Week Highs: Penford ( PENX) surged 32% after the company posted better-then-expected quarterly earnings, with income more than doubling from last year's $5 million mark. The Englewood, Colo.-based company, which makes ingredient systems for industrial and food applications, closed up $5.77 at a 52-week high of $25.15. Biggest % Gainers: Shares of CryoCor ( CRYO) nearly doubled Thursday, soaring 89% after the San Diego company said an advisory panel recommended that the Food and Drug Administration approve its heart application. The device treats atrial flutter, an abnormal-heartbeat condition. The tiny medical company increased $2.24 to $4.78 for the day. Rising on Unusual Volume: Ametek ( AME), which manufactures electronic instruments and electromechanical devices, gained 5.2% Thursday in trading nearly four times average volume. Friedman Billings initiated coverage on the company with an outperform rating. Shares closed up $1.96 at $39.85. Latest Activist Situations: Dillard's ( DDS) jumped 8.1% Thursday as Barington Capital Group disclosed a 3.2% stake in the department-store chain and sent a letter to CEO William Dillard II, requesting a meeting with him and members of his management team. They plan to discuss measures that Barington believes will maximize shareholder value for the benefit of all of the Company's stockholders. The department-store operator closed up $2.76 at $36.69.