Ocwen, Mattel, HCA Holdings, MeadWestvaco and Seagate Technology are big market movers

Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

Ocwen Financial Corp., up 56 cents to $6.91

The mortgage loan servicing company agreed to pay $2.5 million as part of a settlement with California over compliance issues.

HCA Holdings Inc., up $4.36 to $73

The stock of the health care facilities operator will replace Safeway Inc. in the S&P 500 market index after the close of trading on Monday.

MeadWestvaco Corp., up $6.31 to $51.35

The packaging company is merging with Rock-Tenn Co. to create a new $16 billion company, which will be named before the deal closes.

Brookdale Senior Living, down $2.79 to $33.92

The long-term care facility operator cut its guidance for 2015, citing weaker-than-expected results during its recent quarter.

Nasdaq

Mattel Inc., down $1.40 to $26.64

The toymaker's CEO, Bryan Stockton, resigned from the company, which reported worse-than-expected quarterly results.

Seagate Technology Plc., down $4.92 to $59.06

The electronic data storage products maker reported worse-than-expected fiscal second-quarter profit and revenue.

Rockwell Medical Inc., down 8 cents to $10.73

The Food and Drug Administration approved the biotechnology company's treatment for iron loss in chronic kidney disease patients.

Universal Display Corp., up $1.93 to $30.13

The organic LED technology company signed a technology licensing agreement with LG Display Co. for OLED display products.