NEW YORK -- Stocks that traded heavily or had substantial price changes Monday:

       Boeing, down $6.93 to $185.90

       A China Eastern Boeing 737-800 plane with 132 people on board crashed in the southern province of Guangxi on Monday.

       Alleghany, up $167.85 to $844.60

       Warren Buffett’s Berkshire Hathaway is buying the insurance company in a deal valued at about $11.6 billion.

       Anaplan, up $14.01 to $64.60

       Thoma Bravo is buying the software developer for about $10.7 billion.

       Nielsen, down $1.68 to $22.76

       The marketing data company said it rejected a buyout offer of more than $9 billion from a private equity consortium.

       Guess, up 32 cents to $21.74

       The clothing company announced a $175 million stock buyback plan.

       ImmunoGen, down $96 cents to $4.30

       Investors were discouraged by the drug developer's latest study results for a potential ovarian cancer treatment.

       Exxon Mobil, up $3.53 to $82.20

       Energy stocks rose along with crude oil prices.

       Disney, down $1.68 to $138.62

       The entertainment company's theme park in Shanghai closed as China’s most populous city tried to contain its biggest coronavirus flareup in two years.