| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| ATARIFF | Stallion | CHESTNUT | 21689 | 01/08/1958 | Stud Book | Deceased |
| ATBEGIR JUNAIR STAR | Gelding | BAY | 105939 | 22/09/1988 | Stud Book | Not Eligible |
| ATHANA CHICO - HSH | Gelding | CHESTNUT | 262822 | 04/10/2018 | Stud Book | Not Eligible |
| ATHANA CRAFTSMAN - HSH | Gelding | BAY | 242052 | 11/11/2012 | Stud Book | Eligible |
| ATHANA WALT - HSH | Gelding | BROWN | 269910 | 06/09/2021 | Stud Book | Eligible |
| ATHANOR MARNY | Mare | BAY | 77135 | 05/12/1977 | Stud Book | Deceased |
| ATHANOR MIGNONETTE | Mare | BAY/BROWN | 106323 | 12/12/1987 | Stud Book | Not Eligible |
| ATHEL | Mare | BLACK | 23050 | 01/08/1972 | Stud Book | Deceased |
| ATHELINGTON BUSHMAN | Gelding | BROWN | 62146 | 26/09/1977 | Stud Book | Not Eligible |
| ATHELINGTON FLICKER | Mare | CHESTNUT | 24344 | 14/02/1971 | Stud Book | Deceased |
| ATHELINGTON GAMBIT | Stallion | BAY | F14938 | 17/09/1978 | Foal Recorded | Not Eligible |
| ATHELINGTON GO GO DANCER | Mare | CHESTNUT | 24345 | 14/02/1973 | Stud Book | Not Eligible |
| ATHELINGTON PURDY | Mare | CHESTNUT | 62095 | 14/09/1978 | Stud Book | Not Eligible |
| ATHELINGTON ROSEMARY | Mare | TAFFY | 24343 | 11/11/1970 | Stud Book | Deceased |
| ATHELINGTON SKEWIFF | Stallion | BAY/PIED | F30181 | 29/09/1981 | Foal Recorded | Not Eligible |
| ATHELINGTON SOLDANELLA | Mare | BROWN | 62094 | 04/09/1979 | Stud Book | Not Eligible |
| ATHELINGTON VALENTINE | Mare | BAY | 24341 | 14/02/1967 | Stud Book | Deceased |
| ATHELINGTON WHISPER | Mare | CHESTNUT | 62096 | 02/10/1979 | Stud Book | Not Eligible |
| ATHENA - HSH | Mare | CHESTNUT | F34466 | 20/01/1983 | Foal Recorded | Not Eligible |
| ATHENIA MAC - HSH | Mare | CHESTNUT | 120384 | 20/03/1991 | Stud Book | Eligible |
| ATHENS | Mare | BLACK | 72982 | 01/01/1980 | Stud Book | Not Eligible |
| ATHLONES BILLY JACK - HSH | Stallion | DUN | 148064 | 15/12/1998 | Stud Book | Not Eligible |
| ATHLYN BUMBLE | Mare | BAY | 3756 | 01/01/1967 | Stud Book | Deceased |
| ATHLYN GOLDIE | Gelding | CHESTNUT | 76617 | 04/09/1982 | Stud Book | Deceased |
| ATHLYN JODY | Mare | BAY | 76616 | 07/10/1981 | Stud Book | Not Eligible |
| ATHLYN MISS FOX | Mare | BAY | 76615 | 22/04/1986 | Stud Book | Not Eligible |
| ATHOL | Gelding | GREY | 46341 | 01/01/1972 | Stud Book | Deceased |
| ATHOL PARK GOLDIE | Mare | PALOMINO | 18942 | Stud Book | Deceased | |
| ATHOLS TEENA | Mare | GREY | 44516 | 01/01/1971 | Stud Book | Deceased |
| ATHOS | Stallion | BAY | 19727 | 10/12/1973 | Stud Book | Not Eligible |
| ATIGREAT | Mare | BAY/BROWN | BP-78173 | 01/08/1986 | Breeding Purposes Only - Stud Book | Not Eligible |
| ATINA EBONY | Mare | BLACK | 65563 | 01/01/1977 | Stud Book | Not Eligible |
| ATINA PAPRIKA | Mare | BROWN | 65115 | 23/01/1981 | Stud Book | Not Eligible |
| ATKINS BANJO - HSH | Gelding | CHESTNUT | 188872 | 14/09/2008 | Stud Book | Eligible |
| ATKINS COMPROMISE - HSH | Stallion | BAY | 193800 | 21/08/2010 | Stud Book | Eligible |
| ATKINS HARMONY - HSH | Mare | CHESTNUT | 186345 | 02/11/2007 | Stud Book | Deceased |
| ATKINS IVY - HSH | Mare | GREY | 194337 | 16/12/2006 | Stud Book | Eligible |
| ATKINS JEDDA - HSH | Mare | BLACK/GREY | 186340 | 18/10/2007 | Stud Book | Not Eligible |
| ATKINS KAREN | Mare | GREY | 18163 | Stud Book | Deceased | |
| ATKINS KATE | Mare | CHESTNUT | C1-188874 | 01/10/2003 | First Cross | Not Eligible |
| ATKINS MUSIC - HSH | Mare | BROWN | 191520 | 06/10/2009 | Stud Book | Eligible |
| ATKINS NED - HSH | Gelding | CHESTNUT | 188870 | 29/10/2008 | Stud Book | Not Eligible |
| ATKINS OMI - HSH | Mare | GREY | 169924 | 20/09/2005 | Stud Book | Eligible |
| ATKINS OSCA - HSH | Stallion | BROWN/BLACK | 186342 | 04/10/2007 | Stud Book | Not Eligible |
| ATKINS PEARL - HSH | Mare | GREY | 194172 | 26/08/2010 | Stud Book | Eligible |
| ATKINS ROMAN - HSH | Stallion | CHESTNUT | 186344 | 09/11/2007 | Stud Book | Eligible |
| ATKINS SNIP - HSH | Stallion | BAY | 184176 | 28/09/2006 | Stud Book | Eligible |
| ATKINS SOX - HSH | Gelding | GREY | 188868 | 27/10/2008 | Stud Book | Not Eligible |
| ATKINS SPICE - HSH | Mare | CHESTNUT | 186341 | 13/09/2007 | Stud Book | Eligible |
| ATKINS SPOTLIGHT - HSH | Gelding | CHESTNUT | 186343 | 28/10/2007 | Stud Book | Not Eligible |
| ATKINS SUGAR - HSH | Mare | CHESTNUT | 191519 | 12/08/2009 | Stud Book | Deceased |
| ATKINS TARGET - HSH | Gelding | CHESTNUT | 188871 | 10/11/2008 | Stud Book | Not Eligible |
| ATKINS TESSA - HSH | Mare | BROWN/GREY | 188869 | 18/10/2008 | Stud Book | Eligible |
| ATKINS TREASURE - HSH | Mare | CHESTNUT | 188873 | 06/11/2008 | Stud Book | Eligible |
| ATKINS TRUE BLUE - HSH | Stallion | GREY | 191518 | 01/11/2009 | Stud Book | Deceased |
| ATKINS WILLOW - HSH | Stallion | CHESTNUT | 175355 | 24/09/2005 | Stud Book | Deceased |
| ATKINSONS MISTY | Mare | GREY | 4963 | Stud Book | Deceased | |
| ATLANTA | Mare | BLACK | 3328 | Stud Book | Deceased | |
| ATLANTA WAVE - HSH | Stallion | BLACK | 148236 | 07/09/1998 | Stud Book | Not Eligible |
| ATLANTAS GIFT | Gelding | BROWN | 70693 | 01/10/1979 | Stud Book | Deceased |
| ATLANTIC | Mare | CHESTNUT | 3966 | 01/08/1959 | Stud Book | Deceased |
| ATLANTIC MIS DE MEANOUR | Mare | BROWN | 55543 | 14/09/1976 | Stud Book | Not Eligible |
| ATLANTIC STAR | Mare | BROWN | 56642 | 06/11/1973 | Stud Book | Not Eligible |
| ATLANTIS LADY | Mare | CHESTNUT | 68737 | 01/10/1981 | Stud Book | Not Eligible |
| ATLANTUS BLOSSOM | Mare | BROWN | 16770 | 10/12/1970 | Stud Book | Deceased |
| ATLAS | Stallion | BAY | 30860 | 01/01/1972 | Stud Book | Deceased |
| ATLAS ONE - HSH | Stallion | BROWN/BLACK | 236944 | 18/01/2015 | Stud Book | Not Eligible |
| ATLAS RAY DEE - HSH | Stallion | CHESTNUT | 160097 | 02/12/2001 | Stud Book | Deceased |
| ATLAS TWIN BUDDY STICKY BEEK | Gelding | PALOMINO | 118312 | 28/11/1990 | Stud Book | Not Eligible |
| ATOLL | Mare | GREY | 40239 | 08/04/1973 | Stud Book | Not Eligible |
| ATOM - HSH | Stallion | BLACK | 1204 | 26/01/1966 | Stud Book | Deceased |
| ATOM BRUCE | Stallion | BROWN | 54739 | 08/10/1976 | Stud Book | Not Eligible |
| ATOMIC | Mare | CHESTNUT | F20444 | 01/09/1979 | Foal Recorded | Not Eligible |
| ATOMIC BLACK PEARL | Mare | BLACK | C1-257129 | 11/10/2020 | First Cross | Not Eligible |
| ATOMIC CONQUEST | Gelding | CHESTNUT | R-254987 | 26/10/2019 | Base Registry | Eligible |
| ATOMIC SEDUCTION | Gelding | BROWN/GREY | 233433 | 19/10/2013 | Stud Book | Eligible |
| ATOMIC SEDUCTRESS | Mare | BROWN/BLACK | 244898 | 20/10/2016 | Stud Book | Not Eligible |
| ATOMIC SMOOTH AS CACTUS | Gelding | BLACK | C1-260961 | 18/09/2021 | First Cross | Not Eligible |
| ATOMIC SON | Gelding | GREY | 60332 | 28/08/1978 | Stud Book | Not Eligible |
| ATOORAM JAC | Stallion | CHESTNUT | F33601 | 10/11/1982 | Foal Recorded | Deceased |
| ATOORAM JAKI | Mare | BAY/PIED | 56659 | Stud Book | Deceased | |
| ATOUCHOF SILK | Mare | BROWN | 261641 | 13/10/2022 | Stud Book | Eligible |
| ATTA BOY | Gelding | BAY | 20525 | Stud Book | Deceased | |
| ATTADUDE | Gelding | CHESTNUT | 187147 | 28/09/2005 | Stud Book | Not Eligible |
| ATTALAN GIRL | Mare | BAY | 54911 | 17/11/1975 | Stud Book | Not Eligible |
| ATTAR | Gelding | CHESTNUT | 11248 | 01/08/1968 | Stud Book | Deceased |
| ATTARDS ACRE CHASER | Mare | BAY | C2-248435 | 28/10/2012 | Second Cross | Eligible |
| ATTARDS ACRES CHARITY | Mare | BAY | C1-266659 | 26/12/2002 | First Cross | Eligible |
| ATTARDS ALL HEART - HSH | Gelding | BUCKSKIN | 248437 | 18/11/2015 | Stud Book | Not Eligible |
| ATTARDS AMBER OAK | Mare | CHESTNUT | 242496 | 10/10/2008 | Stud Book | Eligible |
| ATTARDS BANJO | Gelding | DUN | C1-188403 | 23/09/2005 | First Cross | Not Eligible |
| ATTARDS BERETTA - HSH | Mare | BLACK | 242497 | 08/10/2010 | Stud Book | Eligible |
| ATTARDS BIG BEN - HSH | Gelding | BROWN | 260355 | 02/10/2016 | Stud Book | Eligible |
| ATTARDS BLACK OAK | Gelding | BLACK | 239302 | 08/10/2010 | Stud Book | Not Eligible |
| ATTARDS BLEEDING HEART - HSH | Mare | BAY | 232261 | 09/01/2004 | Stud Book | Eligible |
| ATTARDS BLUE BLOOD - HSH | Stallion | GREY | 184435 | 19/03/2004 | Stud Book | Eligible |
| ATTARDS BOUNTY HUNTER | Gelding | BUCKSKIN | 268497 | 13/10/2021 | Stud Book | Eligible |
| ATTARDS BROKEN HEART - HSH | Mare | BAY | 184439 | 26/11/2004 | Stud Book | Eligible |
| ATTARDS BUCKSHOT - HSH | Stallion | BUCKSKIN | 267365 | 07/10/2019 | Stud Book | Eligible |
| ATTARDS BUTTER SCOTCH | Mare | BUCKSKIN | 268423 | 21/12/2010 | Stud Book | Eligible |