Short interest during the two-week period ending August 14 rose on all four 3D printing stocks we follow. Share prices dropped for three of the four stocks, and short interest rose sharply in one company. There is still active short interest in these stocks, but all are trading near 52-week lows and that keeps short seller enthusiasm under control.

Short interest in 3D Systems Corp. (NYSE: DDD) rose 8.3% to 37.6 million shares. Some 35.5% of the company’s float was short. Days to cover fell from 11 to eight. In the two-week short interest period, the share price fell about 2%. The stock’s 52-week range is $11.00 to $54.24, and shares closed at $11.87 on Tuesday, down about 3.1% on the day.

Stratasys Ltd. (NASDAQ: SSYS) saw short interest rise by 1.1% in the first two weeks of August to about 13.29 million shares, or about 28% of the company’s float. Days to cover rose from six to seven. The share price fell about 3.9% in the short interest period. The stock closed at $26.84 on Tuesday, down about 3.8% on the day, and the 52-week range is $25.31 to $130.83.

Short interest in The ExOne Co. (NASDAQ: XONE) rose 3.1% to 2.97 million shares. About 32.6% of the company’s shares were short. ExOne’s share price fell more than 21% in the two-week period. The stock’s 52-week range is $5.81 to $30.47, and shares closed at $6.81 on Tuesday, up about 1.3% for the day. Days to cover fell from 18 to 12.

Short interest in Voxeljet A.G. (NYSE: VJET) increased by 0.5% to 1.43 million shares, with days to cover slipping from 13 to 12. The stock price rose about 9% in the two weeks to August 14. The stock closed at $5.52 on Tuesday, down about 1.4% for the day, in a 52-week range of $5.26 to $18.45.

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