Gainers

• Seanergy Maritime Hldgs, Inc. (NASDAQ:SHIP) shares increased by 19.64% to $0.34 during Wednesday's pre-market session.

• TOP Ships, Inc. (NASDAQ:TOPS) stock increased by 13.92% to $0.19.

• Plug Power, Inc. (NASDAQ:PLUG) stock increased by 10.73% to $7.12. The most recent rating by HC Wainwright & Co., on Jun 24, is at Buy, with a price target of $14.

• SG Blocks, Inc. (NASDAQ:SGBX) shares moved upwards by 5.14% to $2.66.

• AeroVironment, Inc. (NASDAQ:AVAV) stock moved upwards by 4.99% to $75.50.

• Hertz Global Holdings, Inc. (NYSE:HTZ) stock increased by 4.80% to $1.31. According to the most recent rating by Barclays, on Apr 27, the current rating is at Underweight.

• FuelCell Energy, Inc. (NASDAQ:FCEL) shares moved upwards by 3.12% to $2.31.

• Cemtrex, Inc. (NASDAQ:CETX) shares rose 3.03% to $1.70.

Losers

• Castor Maritime, Inc. (NASDAQ:CTRM) stock declined 43.33% to $0.36 during Wednesday's pre-market session.

• ClearSign Technologies, Inc. (NASDAQ:CLIR) stock decreased by 3.70% to $1.82.

• United Airlines Holdings, Inc. (NASDAQ:UAL) stock declined 3.49% to $34.82. The most recent rating by Seaport Global, on Jun 17, is at Buy, with a price target of $56.