Champion trainer Paul Nicholls has 10 of the 102 entries for the Grand National at Aintree in April.
Nicholls has never won the race and his hopes include recent Cheltenham winner Neptune Collonges and What A Friend, part-owned by Sir Alex Ferguson.
The Midnight Club is among nine entries for Irish trainer Willie Mullins.
Jonjo O'Neill has three contenders - Don't Push It, who won the National for Tony McCoy in 2010, plus Synchronised and Can't Buy Time.
Entries for the Grand National closed on Wednesday, with the weights announced on 15 February. Of the 102 contenders, 34 are trained in Ireland and three in France.
Last year the race attracted 112 entries. although a maximum field of 40 is allowed on the day for the four-and-a-half mile contest.
Neptune Collonges and What A Friend are joined by stablemates The Tother One, Tricky Trickster, Taranis, Tatenen, Niche Market, Just Amazing, Gullible Gordon and Meanus Dandy.
McCoy won the National at the 15th attempt last year, and was voted the 2010 BBC Sports Personality.
It seems likely he will choose between Don't Push It and January's Welsh National winner Synchronised.
The Northern Irish jockey is retained by owner JP McManus, whose other entries are the recent purchase Quolibet, trained in France by Francois Doumen, as well as Arbor Supreme and Quiscover Fontaine, representing Willie Mullins.
Ballabriggs, trained by Donald McCain, hardened as ante-post National favourite after winning over hurdles at Ayr on Monday.
The 10-year-old, ridden by Jason Maguire, was scoring his fifth straight victory as he took the novices' hurdle over two miles and four furlongs.
Ballabriggs is rated a 16-1 chance for the Aintree marathon on 9 April.
McCain's father Ginger won the National four times - three with Red Rum in the 1970s, plus Amberleigh House in 2004.
Hoping to win the National for a second time will be David Pipe, whose five hopefuls number the 2008 scorer Comply Or Die, now aged 12.
He has also entered Junior, who could seek a remarkable Royal Ascot-Grand National double, having won the Ascot Stakes last summer.
The Evan Williams-trained State Of Play, Howard Johnson's Tidal Bay and Ferdy Murphy's Big Fella Thanks are other interesting contenders.
The Irish entries include the 2008 Welsh National winner Notre Pere, the Edward O'Grady-trained Tranquil Sea, Noel Glynn's stable star Becauseicouldntsee, the Martin Lynch-trained Oscar Time and Gordon Elliott's Backstage, who unseated his rider in the 2010 race.
But one Irish challenger who will not be making the trip is the 2010 Grand National runner-up Black Apalachi, who has been ruled out for the season.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.