Short interest in 3D Systems Corp. (NYSE: DDD) fell 0.3% to 38.5 million shares. Some 36.5% of the company’s float is short. Days to cover rose to 22. In the two-week short interest period to March 31, the share price fell about 1.5%. The stock’s 52-week range is $26.29 to $69.56, and shares closed at $29.79 on Friday. 3D Systems is scheduled to release its earnings on April 27.

Stratasys Ltd. (NASDAQ: SSYS) saw short interest decline 4.8% in the final two weeks of March to about 10 million shares, or about 22.3% of the company’s float. Days to cover remained at 10. The share price fell about 11.2% in the two-week period. The stock closed most recently at $57.06, and the 52-week range is $51.50 to $130.83.

Short interest in The ExOne Co. (NASDAQ: XONE) fell 1.5% to 3.52 million shares. About 39% of the company’s shares are now short. Shares of ExOne fell about 5.7% in the two-week period. The stock’s 52-week range is $13.19 to $48.66, and shares closed at $15.72 on Friday. Days to cover rose to 12.

Voxeljet A.G. (NYSE: VJET) saw short interest fall 4.2% to 1.99 million shares, with days to cover falling to 11. The share price fell about 5.7% in the two-week period to March 31. The stock ended last week at $9.15, in a 52-week range of $7.13 to $27.41.