A mystery donor has given the biggest donation so far to Luigi Mangione’s defense fund, inspired by the “quite exceptional” support for the man suspected of gunning down UnitedHealthcare CEO Brian Thompson.

The “anonymous giver” gave a staggering $36,500 earlier this week — topping the previous record of $30,000 as the total exploded to over $722,000.

The nameless benefactor said he or she was inspired by the huge swelling of support from a wide cross-section of people for the 26-year-old UPenn graduate charged with the shocking murder outside a Manhattan hotel in December.

“What intrigues me about this case is how unified folks’ responses are regardless of strata,” the benefactor wrote.

“In Corporate America, for instance, there has been widespread doubt of potential prosecutorial mishandling and overcharging.

“I’ve also been surprised at the almost ubiquitous nature of support towards the suspect that I would expect to be quite bifurcated in this type of litigation. Quite exceptional,” they added.

The new donation eclipses the former top donation by $6,500.