Oil & gas companies are seeing strong bids today following the weekend attack on Saudi Arabia's key oil facilities:

• Chevron (NYSE: CVX)
• ExxonMobil (NYSE: XOM)
• Occidental Petroleum (NYSE: OXY)
• Apache Corp. (NYSE: APA)
• Marathon Oil (NYSE: MRO)
• EOG Resources (NYSE: EOG)
• Denbury Resources (NYSE: DNR)
• SM Energy (NYSE: SM)
• National Oilwell Varco (NYSE: NOV)
• Ensco Rowan (NYSE: ESV)
• Schlumberger Ltd. (NYSE: SLB)
• Whiting Petroleum (NYSE: WLL)
• W&T Offshore (NYSE: WTI)
• Chesapeake Energy (NYSE: CHK)
• Lonestar Resources US, Inc. (NASDAQ: LONE)
• Oasis Petroleum (NYSE: OAS)
• Seadrill Ltd. (NYSE: SDRL)
• Nabors Industries (NYSE: NBR)
• Transocean (NYSE: RIG)
• Noble Corp (NYSE: NE)
• Extraction Oil & Gas (NASDAQ: XOG)
• California Resources (NYSE: CRC)
• Diamondback Energy (NASDAQ: FANG)