Several companies have cut ties to the National Rifle Association after consumers took to social media to voice outrage against the gun lobby, days after a Florida high-school shooting left 17 people dead.

Insurance giants Chubb Ltd. and MetLife , cybersecurity company Symantec Corp., and Enterprise Holdings, which operates the Enterprise, Alamo and National rental-car chains, were among those that said they would end partnerships with the NRA.

Saturday, both Delta Air Lines Inc. and United Airlines, a unit of United Continental Holdings Inc., ended their discount travel programs with the organization. The airlines also asked the NRA to remove their information from its website.

Companies are reacting partly in response to a social-media movement to pressure or boycott entities with NRA ties, energized by the emotional calls for gun-control action from survivors of the shooting rampage at Marjory Stoneman Douglas High School in Parkland, Fla., and students around the country. On Friday, the hashtag “#BoycottNRA” was among the top trends on Twitter nationally.

One of the first companies to sever ties was First National Bank of Omaha, the largest privately owned bank in the U.S. The bank said Thursday it wouldn’t renew its contract with the NRA for a co-branded credit card, which was promoted as the “official credit card of the NRA.” The NRA Visa card offered a $40 cash-back bonus, enough to pay for the gun lobby’s $40 annual membership fee.