She did not seek damages.
Her defamation claim was over a letter sent by the Fonterra board to shareholders explaining the injunction action, in which the board alleged Guiney had leaked and misrepresented details of board discussions.
Guiney said in a statement she was delighted with the outcome.
"Commonsense has eventually prevailed.
"I look forward to more timely and transparent action on issues that impact we farmer owners' investment in Fonterra, our co-operative and therefore New Zealand.
"Credit and thanks to all the shareholders who supported me. All funds donated will now be donated to Farm Strong.
"The honesty and action on the bad news, openly reflecting the real state of our Fonterra balance sheet from Mr Monaghan last week is a positive step in the right direction"
Fonterra has been approached for comment.