"The acquisition is now only pending approval by the board of Mars One Ventures," the company said in a joint statement with InFin Innovative Finance AG, adding approval from the Mars board would come "as soon as possible."
"The takeover provides a solid path to funding the next steps of Mars One's mission to establish a permanent human settlement on Mars," the statement added.
Mars One consists of two entities: the Dutch not-for-profit Mars One Foundation and a British public limited company Mars One Ventures.
Some 200,000 hopefuls from 140 countries initially signed up for the Mars One project, which is to be partly funded by a television reality show about the endeavour.
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Those have now been whittled down to just 100, out of which 24 will be selected for one-way trips to Mars due to start in 2026 after several unmanned missions have been completed.
"Once this deal is completed, we'll be in a much stronger financial position as we begin the next phase of our mission. Very exciting times," said Mars One chief executive Bas Lansdorp.
But NASA has no plans for a manned mission to Mars until the 2030s.