Reps for President-elect Donald Trump on Thursday said he supported the completion of the Dakota Access Pipeline, but said it had nothing to do with his financial investment in it.

Trump has a stake in the two companies behind the project, Energy Transfer Partners (ETP) which is building the pipeline, and Phillips 66 which will hold a share of the project once it's completed, The Guardian reported.

Trump's stake in the two companies ranges from $250,000 to $550,000 in 2016, according to the Guardian.

The Guardian also reported that ETP CEO Kelcy Warren donated $103,000 to Trump's campaign and gave another $67,000 to the Republican National Committee after the election.

Team Trump on Thursday said his support of the 1,200-mile pipeline had "everything to do with promoting policies that benefit all Americans."

But a Greenpeace spokesperson told The Guardian that Trump's investment is the "definition of corruption."

"The president of the United States should not be trading favors with oil and gas corporations," Mary Sweeters told The Guardian.

"Millions of people will lose access to a clean water supply, including the Standing Rock Sioux tribe, and the rest of America will face the impacts of catastrophic climate change from burning fossil fuels."