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Grand National punter wins £900,000 in the race's biggest winning bet on I Am Maximus – leaving a bookmaker facing liquidation!

An Aintree punter with deep pockets is now an awful lot richer after I Am Maximus’s Grand National victory.

Trackside bookmaker Fitzwilliam Sports revealed before Saturday’s big race that they had accepted a £100,000 bet at odds of 8/1 for the JP McManus horse to win the National – who had won the race in 2024 and finished second in 2025.

And jockey Paul Townend rode the horse to victory in a win that emulated racing legend Red Rum – and gave that punter a pay-out worth £900,000.

Johnny Dineen, fronting Fitzwilliam’s pitch, said before the race: ‘It’s the biggest bet we’ve ever taken, £100,000 at 8-1. 

It’s our biggest bet by a mile and we’ll have to try to trade some of it off in the ring. 

A punter at Aintree pocketed £900,000 in an incredible winning bet at the Grand National

Trackside bookmaker Fitzwilliam Sports accepted the £100,000 bet before the big race

Trackside bookmaker Fitzwilliam Sports accepted the £100,000 bet before the big race

‘It goes without saying it would be a bad result for us!’

More to follow.