Luigi Mangione, UnitedHealthcare CEO Brian Thompson’s suspected killer, expresses disdain for the health insurance industry in manifesto: source

Luigi Mangione, the suspected assassin of UnitedHealthcare CEO Brian Thompson, raged over major healthcare insurance companies’ growing power and claimed they cared only about “immense profit” at the expense of Americans in a handwritten manifesto, according to sources.

Mangione, 26, cited UnitedHealthcare as one of the biggest companies in the US by market capitalization and slammed the health insurance business in the two-and-a-half page manifesto addressed to “the Feds” and recovered by investigators during his arrest Monday.

“The reality is, these [companies] have gotten too powerful, and they continue to abuse our country for immense profit,” Mangione wrote, according to the sources.

He apologized for any trauma he inflicted — likely alluding to his alleged execution-style shooting of Thompson, 50, in busy Midtown last week — but said “it had to be done.”

“I do apologize for any strife of traumas but it had to be done,” he wrote, according to the sources. “Frankly, these parasites simply had it coming.”

Mangione, who was charged with murder by New York prosecutors late Monday, also wrote that he worked alone in the short manifesto.

The writings bear a resemblance to the Ivy League grad’s online anti-capitalist ramblings on sites like Goodreads and X.

In an April tweet, he quoted author Aldous Huxley’s “Brave New World,” a critique of capitalism, the bourgeoise, and how groupings of class are indoctrinated in society, according to its description.

In another post on Goodreads, Mangione quoted the infamous anti-establishment “Unabomber” Ted Kaczynski.

“Imagine a society that subjects people to conditions that make them terribly unhappy then gives them the drugs to take away their unhappiness,’’ Kaczynski wrote at one point in a quote liked by Mangione.

Cops allegedly discovered the handwritten note along with a 3D-printed pistol, 3D-printed silencer, a loaded Glock magazine and multiple fake IDs in his backpack after arresting Mangione at a McDonald’s in Altoona, Pa.

A customer at the fast food chain recognized Mangione from surveillance images of the suspect wanted in the broad daylight shooting of Thompson on a busy Midtown sidewalk last week, police said.

The customer then alerted an employee who called police.

When officers arrived at the eatery, they spotted Mangione using his laptop at a table and asked him to pull down the face mask he was wearing.

Once they saw his face, the officers “immediately recognized him as the suspect,” according to a criminal complaint.

Mangione reportedly began shaking from nerves when one of the cops asked if he had recently visited New York City.

He was cuffed and taken into custody on forgery, carrying firearms without a license, tampering with records or identification, possessing an instrument of crime and providing false identification to law enforcement charges.

He was ordered held without bail and is expected to be extradited to New York.