Chubb said in a statement that it "provided notice of our intent to discontinue participation in the NRA Carry Guard insurance program" three months ago.
The move comes after several other companies cut their ties to the NRA earlier this week, including auto rental company Enterprise, First National Bank of Omaha, Wyndham Hotels and Best Western hotels.
SimpliSafe, a home security services company, also ended its NRA promotions.
The NRA was advertising a Hertz partnership on its "member benefits" page as recently as Friday morning, but that listing disappeared by the afternoon.
The move came after Best Western and Wyndham Hotels, which had offered discounts to NRA members, confirmed they had cut ties with the group after a social media campaign using the hashtag #BoycottNRA targeted them and others.
A day earlier, First National Bank of Omaha announced via tweet that it "will not renew its contract with the National Rifle Association to issue the NRA Visa Card".
At a time when major businesses across the United States, such as MetLife, Symantec, Best Western Hotels & Resorts and Wyndham, have chosen to terminate their relationship with the National Rifle Association, following the organization's stance in the aftermath of the Florida school shooting February 14, two of the largest airlines in the country - United and Delta - made a decision to offer NRA members discounts. "They don't want to risk having people march or boycott".
The NRA did not respond to a request for comment. American Outdoor Brands had dropped 8.8 per cent this week. But the NRA is a well-funded membership operation devoted to a single cause - guns - and unlikely to be moved by the actions of companies with which it has such loose and peripheral ties.
"Much like AARP or AAA, the organization promotes its discounts for members as a selling point for why people should join", ThinkProgress wrote.
Despite growing more and more extreme in its anti-liberal, anti-media rhetoric, the NRA has for the most part escaped a business backlash, even amid a steady stream of mass shootings over the years.
The sponsorship offered discounts to card carrying NRA members once they paid their $40 annual fee.
NRA membership, which costs $40 a year, includes discounts on you-name-it: Up to 65% off on hotels globally, flight discounts and other travel-related deals like vehicle rentals with the pitch you'll "Keep more of your money when renting a auto". Representatives for both Avis and Hertz were not immediately available to comment.
Vehicle rental company Enterprise said on Twitter that discounts for NRA members would no longer be effective starting March 26.
On Friday, Symantecannounced in a terse statement on Twitter that it had also ended its discount program with the gun-rights organization.