Facebook, Nielsen plunge; Supervalu, Qualcomm rise

Stocks that moved substantially or traded heavily Thursday:

Facebook Inc., down $41.24 to $176.26

The social media company reported slower user growth as it grapples with privacy scandals and warned of slowing revenue growth ahead.

Nielsen Holdings PLC, down $7.46 to $22.11

The media and marketing information company reported earnings that fell short of analysts' estimates and said its CEO would leave by the end of the year.

Supervalu Inc., up $12.72 to $32.17

The grocery store operator agreed to be acquired by United Natural Foods for $1.3 billion.

Qualcomm Inc., up $4.16 to $63.58

The chipmaker reported earnings that beat analysts' expectations and said it would abandon a bid to acquire NXP.

Mattel Inc., down 68 cents to $15.61

The maker of Barbie and Hot Wheels reported a loss that was larger than analysts were expecting and said it would eliminate more than 2,200 jobs.

Ford Motor Co., down 63 cents to $9.89

The company reported a sharp drop in profits and said it would undertake a restructuring that will cost $11 billion over the next three to five years.

Arconic Inc., up $2.12 to $21.38

The Wall Street Journal reported that the company is considering takeover approaches from at least two private-equity groups.

D.R. Horton Inc., up $4.30 to $43.84

The homebuilder reported earnings and revenue that easily beat forecasts and announced a $400 million share repurchase program.