Zogenix, Inc. (NASDAQ:ZGNX) was the recipient of a large increase in short interest during the month of June. As of June 30th, there was short interest totalling 9,644,400 shares, an increase of 6.8% from the May 30th total of 9,030,200 shares. Approximately 24.3% of the shares of the stock are short sold. Based on an average daily trading volume, of 817,100 shares, the short-interest ratio is currently 11.8 days.

ExOne Co (NASDAQ:XONE) was the recipient of a large increase in short interest during the month of June. As of June 30th, there was short interest totalling 2,144,600 shares, an increase of 5.7% from the May 30th total of 2,029,000 shares. Approximately 22.2% of the shares of the stock are short sold. Based on an average daily trading volume, of 120,300 shares, the short-interest ratio is currently 17.8 days.

Cara Therapeutics Inc (NASDAQ:CARA) gapped down before the market opened on Friday . The stock had previously closed at $21.66, but opened at $22.75. Cara Therapeutics shares last traded at $22.79, with a volume of 37,852 shares trading hands.

Shares of Martin Midstream Partners L.P. (NASDAQ:MMLP) shot up 8.1% during trading on Friday . The company traded as high as $5.86 and last traded at $5.85, 392,348 shares were traded during mid-day trading. An increase of 56% from the average session volume of 250,894 shares. The stock had previously closed at $5.41.

Ultra Clean Holdings Inc (NASDAQ:UCTT) shares were down 0.8% during mid-day trading on Friday . The company traded as low as $15.03 and last traded at $14.97, approximately 12,402 shares traded hands during trading. A decline of 97% from the average daily volume of 370,843 shares. The stock had previously closed at $15.09.

Shares of Blue Capital Reinsurance Holdings Ltd (NYSE:BCRH) shot up 16.5% on Friday . The company traded as high as $8.20 and last traded at $7.75, 215,797 shares traded hands during trading. An increase of 1,806% from the average session volume of 11,322 shares. The stock had previously closed at $6.65.

Caterpillar Inc. (NYSE:CAT) shares gapped down prior to trading on Thursday following a dissappointing earnings announcement. The stock had previously closed at $132.84, but opened at $131.91. Caterpillar shares last traded at $133.73, with a volume of 2,816,019 shares changing hands.

Gentherm Inc (NASDAQ:THRM) traded down 5.5% during trading on Thursday following a dissappointing earnings announcement. The stock traded as low as $38.06 and last traded at $39.00, 644,892 shares traded hands during trading. An increase of 200% from the average session volume of 214,858 shares. The stock had previously closed at $41.28.

PTC Inc (NASDAQ:PTC)’s share price dropped 0.2% during trading on Friday after an insider sold shares in the company. The company traded as low as $72.87 and last traded at $72.78, approximately 50,095 shares traded hands during mid-day trading. A decline of 94% from the average daily volume of 877,248 shares. The stock had previously closed at $72.90.

Nemaska Lithium Inc (TSE:NMX) shares were down 3% during mid-day trading on Thursday . The stock traded as low as C$0.32 and last traded at C$0.32, approximately 162,640 shares traded hands during mid-day trading. A decline of 93% from the average daily volume of 2,348,038 shares. The stock had previously closed at C$0.33.