Early movers: JOY, COST, HLF, LB, DIS, SHW & more
Brendan McDermid | Reuters. The S&P 500 tech sector just posted its first negative session after a record 15-day streak in the green — its longest winning streak ever. · CNBC

Check out which companies are making headlines before the bell:

Joy Global (NYSE: JOY) — The mining equipment maker lost 23 cents per share for its latest quarter, wider than the 12 cent loss that analysts were expecting. Revenue also came in below estimates, with the company saying its customers took unprecedented steps to conserve cash.

Costco (NASDAQ: COST) — Costco reported quarterly profit of $1.24 per share, 4 cents below estimates, with revenue essentially in line. The warehouse retailer's comparable-store sales, however, did rise for the first time in four quarters.

Herbalife (NYSE: HLF) — The health products seller shares fell more than 10 percent in premarket trading after the company said it identified "errant" information regarding active new member information, and has now taken steps to correct it. Herbalife added that the errors do not impact its historical financial statements.

Intel (NASDAQ: INTC) — The chipmaker's stock was upgraded to "outperform" from "neutral" at RW Baird, citing the increasing positive influence of data center products on Intel's profits.

Walt Disney (NYSE: DIS) — Piper Jaffray upgraded Disney to "overweight" from "neutral," pointing to the value of Disney's upcoming films over the next five years.

Sherwin-Williams (NYSE: SHW) — Citi upgraded the paint maker to "buy" from "neutral," as it gains more market share at major retailer Lowe's (NYSE: LOW) and benefits from lower raw materials costs.

L Brands (NYSE: LB) — The Victoria's Secret parent reported a 5 percent increase in February same-store sales, compared to consensus estimates of a 4.5 percent rise.

Buffalo Wild Wings (NASDAQ: BWLD) — Wedbush upgraded the restaurant chain's stock to "outperform" from "neutral," saying current same-restaurant growth estimates may prove conservative.

BlackBerry (Toronto Stock Exchange: BB-CA) — Verizon (NYSE: VZ) will begin selling BlackBerry's Priv smartphone online beginning today, and in stores on March 11.

American Eagle (NYSE: AEO) — The company matched Street estimates with adjusted quarterly profit of 42 cents per share. Revenue also matched forecasts, but the teen apparel retailer's current quarter guidance is better than analysts were anticipating.

Pure Storage (NYSE: PSTG) — Pure Storage lost 12 cents per share for its latest quarter, smaller than the 16 cent loss anticipated by analysts, while the storage company's revenue beat forecasts. Pure Storage's current quarter and full year revenue guidance is also above Street estimates.