Pete Najarian spoke on CNBC's "Fast Money Halftime Report," about stocks with unusually high options activity.

He noticed bullish activity in FireEye Inc (NASDAQ:FEYE) on Wednesday as traders were buying calls that expire on Friday. They bought around 11,000 contracts of the July $13.50 calls for 40 cents. He followed the trade and he needs the stock to trade above $13.90 in the next two days.

Najarian said that traders were also buying the July $270 calls in Zoom Video Communications Inc (NASDAQ:ZM). They paid between $2.50 and $3 for them. There was also some bullish activity in this name on Monday as the July $260 calls were active. Najarian bought these calls as well.