Gainers

Pacific Drilling PACD shares surged 12.2% to $0.3 during Thursday's after-market session. Today's trading volume for this security ended up closing at 1.3 million shares, which is 21.52 percent of its average volume over the last 100 days. The market value of their outstanding shares is at $22.8 million.

U.S. Well Services USWS stock surged 10.98% to $0.36. Today's trading volume for this security ended up closing at 339.3K shares, which is 60.85 percent of its average volume over the last 100 days. The market value of their outstanding shares is at $28.1 million.

Gulfport Energy GPOR shares moved upwards by 7.87% to $0.71. Gulfport Energy's trading volume hit 529.7K shares by close, accounting for 12.28% of its average volume over the last 100 days. The market value of their outstanding shares is at $114.3 million.

Recon Technology RCON shares rose 7.33% to $1.17. This security traded at a volume of 44.5K shares come close, making up 18.4% of its average volume over the last 100 days. The company's market cap stands at $6.4 million.

Forum Energy Technologies FET stock rose 3.79% to $0.61. Trading volume for this security closed at 8.1K, accounting for 0.31% of its average full-day volume over the last 100 days. The market value of their outstanding shares is at $67.9 million.

SandRidge Energy SD shares increased by 2.51% to $2.04. At the close, SandRidge Energy's trading volume reached 12.1K shares. This is 4.21% of its average volume over the last 100 days. The market value of their outstanding shares is at $72.9 million.

Losers

Vertex Energy VTNR shares declined by 8.37% to $0.52 during Thursday's after-market session. Trading volume for this security closed at 141.1K, accounting for 74.73% of its average full-day volume over the last 100 days. The company's market cap stands at $23.7 million.

Martin Midstream Partners MMLP stock fell 4.42% to $1.3. Martin Midstream Partners's trading volume hit 8.8K shares by close, accounting for 2.88% of its average volume over the last 100 days. The market value of their outstanding shares is at $50.5 million.

Summit Midstream Partners SMLP shares sank 4.23% to $0.75. Trading volume for this security closed at 31.6K, accounting for 7.21% of its average full-day volume over the last 100 days. The company's market cap stands at $70.9 million.

W&T Offshore WTI stock fell 3.59% to $1.75. This security traded at a volume of 51.0K shares come close, making up 1.48% of its average volume over the last 100 days. The market value of their outstanding shares is at $247.9 million.

American Res AREC shares fell 2.84% to $2.06. American Res's trading volume hit 77.6K shares by close, accounting for 3.04% of its average volume over the last 100 days. The company's market cap stands at $53.6 million.

Callon Petroleum CPE stock fell 2.72% to $5.38. This security traded at a volume of 87.7K shares come close, making up 1.05% of its average volume over the last 100 days. The company's market cap stands at $2.1 billion.