Hacked: Marriott International dropped 5.6 percent to $115.03 Friday after disclosing that hackers stole information on as many as 500 million guests over four years.

 

Chip chip, hurrah: Qualcomm stock jumped 3.5 percent to $58.65 Thursday after its CEO said the company is close to resolving its long and costly dispute with Apple. Apple stopped making licensing fee payments to Qualcomm following a legal dispute between the companies, and later decided to stop using Qualcomm parts in some of its products. The stock closed Friday at $58.26.

 

Pump the brakes: General Motors shares rose 4.5 percent to $37.56 Monday after the company said it will lay off 14,000 workers in North America and could close five plants. The company said it will focus more on autonomous and electric vehicles. Shares closed the week at $37.95.

Out in force: Customer-management software developer Salesforce climbed 4.7 percent to $133.50 Wednesday after its earnings and revenue were stronger than analysts expected. Shares closed the week at $142.76.

 

Diamond cut: Tiffany skidded 11.5 percent to $92.83 Wednesday after it said foreign tourists, especially from China, didn’t spend as much at its stores in its latest quarter, pushing down overall sales. Tiffany shares closed Friday at $91.

 

No longer United: United Technologies shares fell 6.1 percent to $120.16 Tuesday after it said it will split into three companies following its $23 billion purchase of aviation electronics maker Rockwell Collins. The stock closed Friday at $121.84.