| J Tizzard | Plumpton 21-Oct-25, Bertie Wooster |
| J Urdampilleta | Palermo 24-Sep-23, Tuti Bopp |
| J V Chaignon | Fontainebleau 17-Oct-25, Dschingis Tiger |
| J Van Eeckhaute | Cagnes-sur-Mer 11-Feb-23, Hugo Du Bourg |
| J Van Handenhove | Marseille-borely 09-May-25, Dream Of Emeraude |
| J Veysey | Exeter 27-Mar-23, Ellipsism |
| J W Mullins | Plumpton 21-Oct-25, Hurst Hill |
| J Walton | Hexham 11-May-25, Eastern Storm |
| J Walton | Perth 21-Oct-25, Uptown Harry |
| J Ward | Ripon 17-Apr-25, Willow Baby |
| J Westholm | Enghien 15-Jun-24, Ninepoints Lasse |
| J Wilborn | Fairmount Park 13-Jul-25, Road Blue |
| J Williams | Exeter 21-Oct-25, La Luna Artista |
| J Williams | Newton Abbot 09-Sep-25, Jaminska |
| J Y Touzaint | Le Lion D'angers 11-Aug-25, Gemini D'ax |
| J Zuliani | Compiegne 20-Oct-25, Jade De La Roque |
| Jaap Visser | Turffontein 30-Aug-25, Super Miss |
| Jabdiel Castillo | Mahoning Valley 22-Oct-25, Ramsey |
| Jacinto D Lezcano | Palermo 27-Mar-23, Le Reveur |
| Jacinto Lezcano | San Isidro 03-Oct-24, Gran Revolucion |
| Jacinto Lopez | Thistledown 11-Oct-25, Hot Princess |
| Jacinto R Benitez | Palermo 06-Jun-23, Nano Rich |
| Jacinto Solis | Delaware Park 09-Oct-25, Midnight Award |
| Jack Abrams | Delaware Park 19-Oct-25, No More Sins |
| Jack Brown | Eagle Farm 18-Oct-25, Paleface Ringo |
| Jack Bruce | Sunshine Coast 19-Oct-25, Casterly Rock |
| Jack Casey | Sunshine Coast 07-May-17, Chilli Con Carne |
| Jack Cockell | Dongara-Irwin 31-Mar-18, Brittella |
| Jack Dalton | Ararat 29-Nov-22, Stone Quick |
| Jack Fisher | Far Hills 19-Oct-25, Cyber Ninja |
| Jack Hancock | Ellis Park 18-Aug-25, Sir Vincent |
| Jack Harrington | Ashburton 04-Apr-24, Getalonghome |
| Jack Hurley | Charles Town 06-Jun-25, Cloud Forest |
| Jack Jones | Yarmouth 22-Oct-25, Saliko |
| Jack Laing | Ballarat 14-Oct-25, Bancory Bay |
| Jack McCartney | Turf Paradise 25-Apr-25, Bangie Go |
| Jack Morland | Wolverhampton 21-Oct-25, Regal And Real |
| Jack Pilkington | Hawkesbury 16-Oct-25, Pretty Tavi |
| Jack Scott | Pukekura Raceway 21-Jul-18, Bang |
| Jack Steiner | Golden Gate Fields 30-Dec-23, Thickey Boy |
| Jack Sullivan | Townsville 22-Aug-14, Lake Vermont |
| Jack Van Duren | Goulburn 07-Oct-25, I Iz Brilliant |
| Jackie Beriman | Gunbower 04-Oct-25, Sunflower Gift |
| Jackie Burrows | Riccarton Park Synthetic 24-Jul-25, Beaver Fever |
| Jackie Crompton | Dalby 26-Jun-25, Charged |
| Jackie Panizza | Ascot 11-Oct-25, Invincible Ruby |
| Jackie Riddle | Zia Park 21-Dec-23, Tardy Cat |
| Jackie Stoetzer | Port Lincoln 30-Mar-25, He's Abel |
| Jackson Matthews | Balaklava 19-Jun-24, Pandarus |
| Jackson Morris | Ipswich 03-Sep-25, Sacred Ted |
| Jackson Pallot | Bairnsdale 14-Oct-24, Nocreditilmidnite |
| Jaclyn Reed | Delaware Park 16-Oct-25, Opportune Notion |
| Jacob Dillon | Charles Town 01-Dec-24, Midnight Regret |
| Jacob Hess | Charles Town 01-Mar-25, Spydylegs |
| Jacob McKay | Te Rapa 04-Mar-23, Mighty Connor |
| Jacob Perrett | Armidale 14-Oct-25, Balmierro |
| Jacob Renteria | Lone Star Park 19-Sep-25, Full Moon Follies |
| Jacob Tafoya | |
| Jacobo Mejia | Lone Star Park 19-Oct-25, Running Dragon Fire |
| Jacoby Landry | Fair Grounds 13-Dec-24, Candy Girl Miss |
| Jacque Guerra | Turf Paradise 04-May-25, Desert Breeze |
| Jacqueline Falk | Finger Lakes 22-Oct-25, Hal Away |
| Jacqueline Greentree | Orange 09-Oct-25, Frosty Bangers |
| Jacqueline Henderson | Geraldton 04-Mar-23, Scarlet At Tara |
| Jacqueline Savoye | Laurel Park 07-Jan-23, Bourbon On The Bay |
| Jacquelyn Scott | Leinster 18-Oct-25, Ginger Jive |
| Jacques Strydom | Fairview 17-Oct-25, Downing Seven |
| Jacqui Navarre | Emerald Downs 08-Sep-25, Code Ribbon |
| Jacqui Paisley | Donald 08-Oct-12, FILLE DE CHOIX |
| Jacqui Sims | Echuca 20-Oct-25, Ambalac |
| Jada Schlenk | Fairmount Park 01-Jun-25, Izeondec |
| Jade Darose | Cranbourne 09-Dec-22, Bobbysangtheblues |
| Jade Doolan | Cloncurry 10-Oct-25, Your Too Good |
| Jade McDonald | Goulburn 07-Feb-21, Boudicas |
| Jade Tangaroa | Ascot 15-Oct-25, Social Affair |
| Jade Zuppicich | Waverley 19-Oct-25, Celtic Echo |
| Jai Phillips | Kilcoy 28-Feb-20, Harpah's Joy |
| Jailinne Venzor | Louisiana Downs 10-Sep-24, Bad Brad |
| Jaime Aldavaz | Sunland Park 05-Apr-25, Super Stuper |
| Jaime Barreto | Gavea 27-Jan-25, Borba Gato |
| Jaime C C | Hipodromo Chile 11-May-25, Desert Cat |
| Jaime Castellanos | Remington Park 19-Oct-25, Sanoviv |
| Jaime Cruz | Meadowlands 12-Oct-25, Queen Valentine |
| Jaime Estrada | Penn National 09-May-25, Checkitup |
| Jaime Gonzalez | Oaklawn Park 04-May-25, God's Country |
| Jaime H. Gomez | Los Alamitos Racecourse 12-Oct-25, Aj Born Runnin |
| Jaime Herrera | |
| Jaime R R | Hipodromo Chile 11-May-25, Nany Arch |
| Jaime Vigil | Mountaineer 07-Oct-25, Best Chance Yet |
| Jaimee Entwisle | Ellerslie 07-May-25, He's Platinum |
| Jaimee-lee Lupton | Waverley 19-Oct-25, Arcadian Iynx |
| Jairo Borges | Gavea 20-May-25, Rustico |
| Jairo Monascal | Los Alamitos Racecourse 22-Jun-25, Borntostaythirsty |
| Jake Capewell | Warwick 11-Oct-25, Mister Mighty |
| Jake Casey | Broome 13-Aug-19, Corporate Strategy |
| Jake Hull | Grafton 21-Oct-25, Go Isla Go |
| Jake Radosevich | Thistledown 20-May-25, Moonshine Joe |
| Jake Stephens | Morphettville 30-Aug-25, Tropical House |
| James & Lisa Dodgson | Bordertown 02-May-25, Call It A Hunch |
| James & Lisa Dodgson | Mt Gambier 10-Jul-24, Zeydana |