Bloomberg insiders are grumbling. The hard-working journalists feel ripped off by writers at Forbes who published the title’s billionaires list.

Specifically, they feel slighted when its comes to the facts surrounding the wealth — or lack of it — of Walmart heiress Christy Walton.

Walton had long been billed as the wealthiest woman in America.

Bloomberg writers David De Jong and Tom Metcalf, however, broke the news in November that Walton was not as wealthy as was believed.

“Walmart heir is $27 billion poorer than everyone thought,” the headline of the story blared.

The two scribes got a Wyoming court to unseal documents related to her inheritance.

Bloomberg estimated her wealth at $5 billion — not $32 billion. It turns out half of John Walton’s then-$17 million fortune went to charitable trusts while a third went to his son, Lukas.

In its latest ranking, Forbes published the lower Christy Walton wealth total — but gave no credit to that Bloomberg scoop.

According to a Forbes spokeswoman: “Forbes reviewed unsealed documents and made its own determination about Christy Walton’s net worth.”