Watch These 5 Huge Call Purchases In Friday Trade

Benzinga's newsdesk monitors options activity to notice unusual patterns. These large volume (and often out of the money) trades were initially published intraday in Benzinga Professional . These trades were placed during Thursday's regular session.

• GrubHub Inc GRUB Sep16 37.5 Calls: 825 @ ASK $1.25: 1062 traded vs 99 OI: $36.58 Ref
• Gap Inc GPS Aug16 26.5 Calls: 500 @ ASK $0.45: 3024 traded vs 383 OI: $25.96 Ref
• National-Oilwell Varco, Inc. NOV Jan18 42.5 Calls: 5000 @ ASK $4.15: 5001 traded vs 353 OI: $36.04 Ref
• United Natural Foods, Inc. UNFI Sep16 50.0 Calls: 1106 @ ASK $0.95: 1500 traded vs 48 OI: Earnings 9/20 $46.41 Ref
• Mentor Graphics Corp MENT Aug16 22.5 Calls Sweep: 520 @ ASK $0.45: 1652 traded vs 188 OI: $22.18 Ref