NEW YORK -- Stocks that traded heavily or had substantial price changes Wednesday:
Mastercard Inc., down 11 cents to $347.42.
The processor of debit and credit card payments raised its dividend and approved a $9 billion stock buyback program.
Pinterest Inc., down 4 cents to $22.68.
The digital pinboard and shopping tool company announced a partnership with Elliott Investment Management.
Campbell Soup Co., up $3.19 to $56.18.
The maker of canned soup and other food products reported strong fiscal first-quarter financial results.
MongoDB Inc., up $33.61 to $178.30.
The database platform's third-quarter earnings and revenue beat analysts' forecasts.
Prometheus Biosciences Inc., up $59.74 to $95.80.
The biopharmaceutical company gave investors an encouraging update on the development of a potential ulcerative colitis and Crohn's disease treatment.
United Natural Foods Inc., down $6.74 to $38.84.
The natural and organic food company's fiscal first-quarter earnings fell short of Wall Street forecasts.
AeroVironment Inc., down $2.74 to $82.37.
The maker of unmanned aircraft reported weak fiscal second-quarter financial results.
Smith & Wesson Brands Inc., down $2.31 to $9.49.
The firearm maker's fiscal second-quarter earnings and revenue fell short of analysts' forecasts.