| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| JACK OF ALL TRADES | Stallion | CHESTNUT | 199410 | 19/10/2010 | Stud Book | Not Eligible |
| JACK OF DIAMOND | Gelding | CHESTNUT | 30214 | 09/09/1967 | Stud Book | Deceased |
| JACK OF HART | Gelding | CHESTNUT | 81117 | 10/09/1991 | Stud Book | Deceased |
| JACK OF HEARTS | Stallion | CHESTNUT | F13024 | 30/12/1977 | Foal Recorded | Not Eligible |
| JACK POT | Gelding | CHESTNUT | 56162 | Stud Book | Deceased | |
| JACK RIVER ARROW | Gelding | BAY | 16166 | Stud Book | Deceased | |
| JACK RIVER BAMBI | Mare | BROWN | 9067 | Stud Book | Deceased | |
| JACK RIVER CLEVER MISS | Mare | BROWN | F27077 | 15/08/1980 | Foal Recorded | Not Eligible |
| JACK RIVER FLIGHT | Mare | BAY | F19384 | 13/08/1979 | Foal Recorded | Not Eligible |
| JACK RIVER GOLDEN FLASH | Mare | CHESTNUT | 42678 | 10/09/1974 | Stud Book | Not Eligible |
| JACK RIVER ROSE | Mare | BAY | F9367 | 22/08/1977 | Foal Recorded | Not Eligible |
| JACK ROBINSON | Stallion | BAY | FX85 | 31/10/1972 | Foal Recorded | Not Eligible |
| JACK RUSH - HSH | Gelding | GREY | 128322 | 05/09/1995 | Stud Book | Eligible |
| JACK RUSSELL | Gelding | BROWN/BLACK | 118596 | 12/12/1990 | Stud Book | Not Eligible |
| JACK SPARROW | Gelding | BAY | C1-170849 | 25/08/2003 | First Cross | Eligible |
| JACK SPRAT | Gelding | BAY | 56138 | Stud Book | Not Eligible | |
| JACK THE RIPPER | Gelding | CHESTNUT | 56002 | 04/11/1978 | Stud Book | Not Eligible |
| JACKADGERY | Gelding | CHESTNUT | 12326 | 01/01/1970 | Stud Book | Deceased |
| JACKADILLY | Mare | CHESTNUT | 37886 | 01/08/1970 | Stud Book | Deceased |
| JACKAFELLA FAUXLAND | Gelding | BROWN | 20657 | 22/09/1965 | Stud Book | Deceased |
| JACKALENE ACRES | Mare | CHESTNUT | 187885 | 12/11/2008 | Stud Book | Not Eligible |
| JACKALINE | Mare | BAY | 58184 | 10/12/1975 | Stud Book | Not Eligible |
| JACKALONG DOLLYVARDAN | Mare | BAY | 47978 | Stud Book | Not Eligible | |
| JACKALONG HANSEL | Stallion | BAY | F27434 | 09/09/1979 | Foal Recorded | Not Eligible |
| JACKANORY CASHMERE | Mare | BAY | 47406 | 01/08/1973 | Stud Book | Not Eligible |
| JACKAROO CRUSADE | Gelding | BAY | C1-240989 | 01/09/2015 | First Cross | Not Eligible |
| JACKAVARD | Gelding | BAY | 33757 | 01/01/1970 | Stud Book | Deceased |
| JACKEROO | Gelding | BAY | 10408 | 01/01/1966 | Stud Book | Deceased |
| JACKET | Gelding | BROWN | 50294 | 05/02/1971 | Stud Book | Deceased |
| JACKETTE C - HSH | Mare | BROWN | 76365 | 06/12/1985 | Stud Book | Deceased |
| JACKIE | Mare | GREY | 25 | 01/08/1965 | Stud Book | Deceased |
| JACKIE BARKER BRONZE | Stallion | CHESTNUT | 38782 | 26/01/1971 | Stud Book | Deceased |
| JACKIE BLUE | Mare | BLACK/ROAN | C1-247291 | 31/10/2016 | First Cross | Eligible |
| JACKIE C - HSH | Mare | BROWN | 2526 | 01/01/1966 | Stud Book | Deceased |
| JACKIE GIRL | Mare | GREY | 17017 | 01/08/1963 | Stud Book | Deceased |
| JACKIE HOWE | Mare | CHESTNUT | 74168 | 01/01/1982 | Stud Book | Not Eligible |
| JACKIE JONES | Mare | BROWN | 204 | 01/08/1962 | Stud Book | Deceased |
| JACKIE O | Mare | GREY | 101904 | 17/12/1982 | Stud Book | Deceased |
| JACKIE TEE | Mare | CHESTNUT | 139860 | 24/12/1997 | Stud Book | Not Eligible |
| JACKIE TEE MOND | Gelding | CHESTNUT | 68624 | 21/12/1981 | Stud Book | Deceased |
| JACKIELAW | Mare | CHESTNUT | 66515 | 04/10/1971 | Stud Book | Deceased |
| JACKIES ANGEL | Mare | BROWN | F30967 | 21/06/1980 | Foal Recorded | Not Eligible |
| JACKIES JOY | Mare | BAY | 24674 | 30/09/1967 | Stud Book | Deceased |
| JACKIS DINA | Mare | GREY | 80196 | 01/08/1975 | Stud Book | Deceased |
| JACKLINE - HSH | Mare | BAY | 34623 | 01/01/1973 | Stud Book | Not Eligible |
| JACKLYN | Mare | GREY | 15505 | 16/10/1972 | Stud Book | Not Eligible |
| JACKMAN | Gelding | GREY | 52574 | 01/10/1973 | Stud Book | Not Eligible |
| JACKMANS NORTH - HSH | Gelding | GREY | 242998 | 12/07/2005 | Stud Book | Eligible |
| JACKMANS TRINKET | Mare | BAY/BROWN | 268422 | 09/10/2023 | Stud Book | Eligible |
| JACKO | Gelding | BLACK | 8824 | Stud Book | Deceased | |
| JACKO BOY | Gelding | CHESTNUT | 57899 | 01/11/1977 | Stud Book | Deceased |
| JACKO SCHYLOE CAREW | Gelding | BAY | 129674 | 10/11/1995 | Stud Book | Not Eligible |
| JACKOO | Gelding | BAY | 15764 | 01/01/1968 | Stud Book | Deceased |
| JACKOS ACTIVE - HSH | Mare | BAY | 142502 | 27/10/1998 | Stud Book | Not Eligible |
| JACKOS ACTRESS - HSH | Mare | BROWN | 133662 | 05/10/1997 | Stud Book | Deceased |
| JACKOS ASTERISK - HSH | Gelding | BAY/BROWN | 146172 | 27/11/1999 | Stud Book | Not Eligible |
| JACKOS COPYWRITE - HSH | Mare | BROWN | 177495 | 16/11/2003 | Stud Book | Not Eligible |
| JACKOS FANCY - HSH | Mare | BAY | 196586 | 02/11/2010 | Stud Book | Not Eligible |
| JACKOS GOLDIE | Mare | CHESTNUT | 28407 | Stud Book | Not Eligible | |
| JACKOS MOTION - HSH | Gelding | BAY | 186873 | 04/10/2007 | Stud Book | Not Eligible |
| JACKS AMBER SPIN | Mare | PALOMINO | SM-163615 | 05/12/2000 | Special Merit - Stud Book | Not Eligible |
| JACKS BOY | Gelding | BAY | 41726 | 01/10/1966 | Stud Book | Deceased |
| JACKS BRATT | Gelding | BAY | 49742 | 02/10/1977 | Stud Book | Not Eligible |
| JACKS CHIC WILLOW | Mare | BUCKSKIN | C1-235762 | 02/01/2012 | First Cross | Not Eligible |
| JACKS DIANA | Mare | GREY | 8178 | Stud Book | Deceased | |
| JACKS DIXIE | Stallion | BAY | F34259 | 10/10/1982 | Foal Recorded | Not Eligible |
| JACKS DOUBLE | Stallion | BAY | F21310 | 12/09/1979 | Foal Recorded | Not Eligible |
| JACKS DREAM | Mare | BROWN | 170165 | 05/12/2003 | Stud Book | Not Eligible |
| JACKS FRECKLES OAK | Gelding | BAY | C2-177798 | 24/09/2006 | Second Cross | Not Eligible |
| JACKS GIFT | Gelding | BROWN/GREY | F25132 | 01/11/1979 | Foal Recorded | Not Eligible |
| JACKS IMAGE | Mare | BROWN/BLACK | 128976 | 28/11/1995 | Stud Book | Not Eligible |
| JACKS JOY | Stallion | BROWN | F16103 | 26/10/1978 | Foal Recorded | Not Eligible |
| JACKS LASS - HSH | Mare | GREY | 3334 | 01/08/1969 | Stud Book | Deceased |
| JACKS LIGHT | Mare | BAY | 5404 | 31/10/1968 | Stud Book | Deceased |
| JACKS MACK | Gelding | BAY | C1-265607 | 16/10/2019 | First Cross | Eligible |
| JACKS MOSCOW | Gelding | CHESTNUT | 248411 | 01/12/2017 | Stud Book | Not Eligible |
| JACKS PHANTOM | Gelding | BAY | C1-129067 | 04/11/1995 | First Cross | Not Eligible |
| JACKS PRIDE | Gelding | BLACK | 74239 | 14/01/1983 | Stud Book | Not Eligible |
| JACKS QUALITY | Stallion | BAY | 192448 | 24/10/2009 | Stud Book | Not Eligible |
| JACKS REVENGE | Stallion | BROWN/BLACK | 81134 | 01/01/1993 | Stud Book | Not Eligible |
| JACKSHAY JULIET - HSH | Mare | BAY | 148519 | 14/01/1998 | Stud Book | Not Eligible |
| JACKSON | Gelding | BROWN | 11091 | Stud Book | Deceased | |
| JACKSON BROWN - HSH | Gelding | BLACK | 168310 | 25/11/2002 | Stud Book | Not Eligible |
| JACKSON COUNTY CASPER | Gelding | CREMELLO | C1-164716 | 12/07/1997 | First Cross | Not Eligible |
| JACKSON COUNTY LITTLE FRED | Gelding | BAY | 174631 | 10/12/1998 | Stud Book | Not Eligible |
| JACKSON COUNTY TARA | Mare | BAY | 156960 | 10/10/1988 | Stud Book | Not Eligible |
| JACKSON JOE | Gelding | BROWN | 46702 | 20/10/1973 | Stud Book | Not Eligible |
| JACKSON STUD SPEEDO - HSH | Gelding | BAY | 176466 | 19/12/1999 | Stud Book | Not Eligible |
| JACKSONCOUNTY CHEVVY IVORY | Gelding | BLACK | C1-187083 | 30/11/2006 | First Cross | Not Eligible |
| JACKSONCOUNTY RIVAL - HSH | Gelding | BAY | 190338 | 15/09/2009 | Stud Book | Not Eligible |
| JACKSONCOUNTY SODA SCREAMA | Mare | BAY | 187081 | 04/08/2007 | Stud Book | Not Eligible |
| JACKSONCOUNTY SQUARE UP | Gelding | BAY | 187082 | 26/12/2005 | Stud Book | Not Eligible |
| JACKSONCOUNTY SWEET JUSTICE - HSH | Mare | BAY | 182562 | 15/08/2006 | Stud Book | Not Eligible |
| JACKSONCOUNTY WEEVA BRUCE | Gelding | BAY | 173659 | 31/12/2003 | Stud Book | Not Eligible |
| JACKSONS ABBY TRIBUTE - HSH | Mare | BROWN | C2-236278 | 16/01/2007 | Second Cross | Eligible |
| JACKSONS AUDIACIOUSE ACRES | Mare | CHESTNUT | C1-236279 | 17/10/2010 | First Cross | Eligible |
| JACKSONS AUSTIN ACRES | Gelding | CHESTNUT | C2-236280 | 26/06/2012 | Second Cross | Eligible |
| JACKSONS BARMAID | Mare | GREY | 21519 | 14/09/1971 | Stud Book | Deceased |
| JACKSONS BLACK BONNY | Mare | BLACK | C1-188218 | 17/10/2000 | First Cross | Eligible |
| JACKSONS BLACK SAMBUCA | Gelding | BLACK | 256370 | 08/11/2018 | Stud Book | Eligible |