Early movers: DWDP, LULU, PANW, AMBA, NTNX, THC, RDY, WDC & more

Check out which companies are making headlines before the bell:

DowDupont – The merger of Dow Chemical and DuPont is complete as of today, and the new company – DowDupont – will begin trading today on the New York Stock Exchange under the symbol "DWDP."

Lululemon — The yogawear maker posted adjusted quarterly profit of 39 cents per share, four cents a share above estimates. Revenue also beat forecasts, as did its comparable-store sales. Lululemon also raised its full-year forecast.

– Palo Alto beat estimates by 13 cents a share, with adjusted quarterly profit of 92 cents per share. The cybersecurity software maker also beat on the top line. Palo Alto said it added a record number of new customers during the quarter. Separately, the company announced that CFO Steffan Tomlinson will retire and that a search for his replacement is underway.

Ambarella – Ambarella reported adjusted quarterly profit of 48 cents per share, four cents a share above estimates. The maker of image processing chips also saw revenue beat forecasts. Ambarella, a key supplier of chips to high definition camera maker , said it is also seeing growth in areas like original auto equipment and security applications.

Nutanix – Nutanix lost 33 cents per share for its latest quarter, five cents a share less than analysts had anticipated. The enterprise software vendor's revenue beat Street forecasts as well, and its current quarter revenue guidance is also above estimates amid strong growth from OEM partners.

Tenet Healthcare — Tenet is replacing Chief Executive Officer Trevor Fetter and several directors. The hospital operator has been under pressure from activist investor Glenview Capital Management, Tenet's largest shareholder with a 17.8 percent stake. Tenet shares have lost about three-quarters of their value over the past two years. Fetter will depart by mid-March.

Dr. Reddy's — London-based drugmaker Indivior plans to appeal a US court ruling that Dr. Reddy's – a maker of generic drugs - had not infringed its patents for an opioid addiction treatment.

Western Digital — CEO Stephen Milligan issued an apology to Toshiba for strained relations in the ongoing dispute over the sale of Toshiba's chip unit. Western Digital – Toshiba's partner in a Japan-based chip factory – is trying to buy the unit in conjunction with several partners, but Toshiba is in the process of negotiating with several parties about a sale.

Hewlett Packard Enterprise – The company completed the spinoff of its enterprise software businesses, as it shifts its focus to cloud services, closing the books on the ill-fated 2011 acquisition of software company Autonomy.

Wynn Resorts, Las Vegas Sands – These and other casino operators with operations in Macau may benefit after casinos in the gambling hub reported a 13 consecutive month of revenue gains for August.

Amazon.com – Amazon is planning to launch its one hour and two-hour delivery services – known as "Prime Now" – in Canada later this year.

Barnes & Noble – Barnes & Noble issued a denial of a published report saying the book retailer is exploring the idea of taking itself private.