Mario Tama U.S. stock index futures on Wednesday pointed to a lower open, with the tech-heavy Nasdaq 100 futures ( US100:IND ) especially taking it on the chin after a slump in global chip companies.

Here are some stocks to watch on Wednesday: Shares of J.B. Hunt Transport Services ( JBHT ) slipped nearly 3% in pre-market trading, after the U.

S. trucking firm reported a top- and bottom-line Q2 miss. Its quarterly revenue of $2.

93B fell 7% Y/Y, with sales in its biggest segment, intermodal, decreasing 5%. Additionally, its integrated capacity solutions business, which offers freight brokerage services, saw load volume decline 25%. J.

B. Hunt's ( JBHT ) Q2 operating income shed 24% Y/Y, primarily due to lower revenue, and higher insurance and claims, equipment-related, and certain personnel-related expenses. Johnson & Johnson ( JNJ ) stock seesawed ahead of the opening bell, last down marginally .

The New Brunswick, N.J.-based pharmaceutical giant beat Q2 top- and bottom-line estimates, as strong sales of its drugs helped offset a middling performance at its medical tech division.

The Dow 30 component's blockbuster psoriasis drug Stelara and cancer medicine Darzalex both brought in quarterly sales of $2.89B each. J&J ( JNJ ) also slightly upped its full year sales guidance.

This was the company's first results since closing its ~$13B acquisition of Shockwave Medical. See how JNJ performed in charts . Shares of United Airlines ( UAL ) will be in focus, with the U.

S. carrier sched.