Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
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Ventas Inc., up $3.67 to $76.90
The real estate investment trust, which focuses on health care facilities, will pay $1.75 billion for Ardent Medical Services Inc.
Williams Partners LP, down $1.04 to $47.72
The energy infrastructure company said it is buying an additional stake in Utica East Ohio Midstream for about $575 million.
Tesla Motors Inc., up $12.10 to $203.10
The electric vehicle maker said last week that it sold more than 10,000 cars in its first quarter, 55 percent more than a year ago.
Garmin Ltd., up 23 cents to $46.71
Shares of the GPS maker fell to a 52-week low earlier in the day as a Citi analyst said Garmin's smartwatches will face increasing competition.
Mattel Inc., up $1.35 to $24
The maker of Barbie dolls and Hot Wheels cars named Christopher Sinclair as its permanent CEO last week.
Comcast Corp., up 27 cents to $58.21
"Furious 7," the latest film from the cable company's Universal Pictures unit, made nearly $144 million at the box office over the weekend.
TripAdvisor Inc., up 90 cents to $83.40
The travel website company said last week that its Chief Financial Officer Julie M.B. Bradley resigned to spend more time with her family.
Cosi Inc., down 7 cents to $2.52
The restaurant operator said it completed an acquisition of a 15-store Cosi franchise company that was owned by CEO RJ Dourney.