Nathan Tinkler (born 1 February 1976) is an Australian mining industry executive and was previously the principal shareholder of Aston Resources[1] and Whitehaven Coal.

[12] In December 2018, entities associated with Tinkler commenced proceedings in the New South Wales Supreme Court against Whitehaven Coal seeking compensation in relation to the 2012 acquisition of Boardwalk Resources Limited.

In 2008, Tinkler established a racehorse enterprise, Patinack Farm, which became one of Australia’s largest locally owned racing organisations, experiencing tremendous success in a short period of time.

[19] Federation chief executive Ben Buckley refused to rule out the possibility of launching a damages claim against Tinkler that could go as high as $80 million.

Thompson also said that Tinkler's racing and breeding company, Patinack Farm, had been asked to leave its Hawkesbury private training facility because "the owner of the property just got sick of us being late with our rent".

[29] On 19 June 2013, it was announced that Tinkler's biggest remaining asset, a 19 per cent share in coal miner Whitehaven, had been bought by his main financial backers, including Farallon Management.

[30] The funds raised by the sale of his Whitehaven shares enabled Tinkler to repay a $12 million debt to coal exploration company Blackwood Resources on 27 June, a day ahead of schedule.

[32] On 21 May 2014, it was reported that contracts had been exchanged to sell Patinack Farm, for an undisclosed sum, to a consortium consisting of "local and overseas parties from the Middle East".

[33] On 20 July 2015, an arrest warrant was ordered for Tinkler after he failed to appear in the Supreme Court in Adelaide to answer questions about the liquidation of his Patinack horse farm.

Federal Court judge, Jacqueline Gleeson, ruled GE was entitled to make Tinkler, then resident in Singapore, bankrupt, but stayed the order pending an urgent appeal.

He told his bankruptcy trustee that he only had one asset, a farm near the NSW north coast town of Port Macquarie, which has caveats held on it by retailer Gerry Harvey and the local council.