| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OVERDENE MAGIC | Mare | BROWN | 71228 | 04/10/1981 | Stud Book | Not Eligible |
| OVERDRAFT - HSH | Mare | BAY | 178988 | 04/11/2002 | Stud Book | Eligible |
| OVEREXCEL | Mare | BUCKSKIN | C1-246848 | 15/10/2011 | First Cross | Eligible |
| OVERFLOW DOWNS CHECK MATE | Gelding | BAY | 112070 | 29/10/1989 | Stud Book | Not Eligible |
| OVERFLOW DOWNS FINETTE | Mare | CHESTNUT | 105756 | 17/10/1985 | Stud Book | Deceased |
| OVERFLOW DOWNS FLORENCE | Mare | CHESTNUT | F112071 | 04/09/1990 | Foal Recorded | Not Eligible |
| OVERFLOW DOWNS JESSICA | Mare | CHESTNUT | 106015 | 28/09/1987 | Stud Book | Not Eligible |
| OVERFLOW DOWNS PURE GRACE | Mare | BAY | 139719 | 29/09/1991 | Stud Book | Deceased |
| OVERFLOW DOWNS SO REAL | Mare | BAY/BROWN | 77463 | 01/08/1976 | Stud Book | Deceased |
| OVERFLOW ROCKETT - HSH | Mare | BLACK | 196722 | 07/01/1992 | Stud Book | Not Eligible |
| OVERFLOW TUPPENCE | Mare | BAY | F30839 | 14/01/1980 | Foal Recorded | Not Eligible |
| OVERFLOW WAITAWHILE | Mare | BROWN/BLACK | 57892 | 14/01/1977 | Stud Book | Not Eligible |
| OVERLANDER BONITA - HSH | Mare | BAY/PIED | 45381 | 16/10/1976 | Stud Book | Deceased |
| OVERLANDER PETER - HSH | Stallion | BLACK | F34645 | 25/11/1982 | Foal Recorded | Not Eligible |
| OVERNEWTON HONEY | Mare | BAY | 51624 | Stud Book | Deceased | |
| OVERSBY UP TOWN GIRL | Mare | BAY | C1-257251 | 10/01/2017 | First Cross | Eligible |
| OVERSEER | Stallion | BAY | 553 | Stud Book | Deceased | |
| OVERSTON BELINDA | Mare | GREY | 50096 | 01/10/1974 | Stud Book | Not Eligible |
| OVERSTON RINGO | Stallion | BLACK | F19989 | 08/10/1978 | Foal Recorded | Not Eligible |
| OVERSTON SUE | Mare | BROWN | 45681 | Stud Book | Not Eligible | |
| OVERTIME | Stallion | CHESTNUT | 24798 | 03/10/1972 | Stud Book | Deceased |
| OVINGDEAN KATRINA | Mare | BAY | 42321 | 27/11/1974 | Stud Book | Not Eligible |
| OVINGDEAN KINGSLY | Stallion | BAY | F14688 | 06/11/1977 | Foal Recorded | Not Eligible |
| OVINGDEAN MISTER NOBODY | Stallion | BROWN/BLACK | F18850 | 12/10/1978 | Foal Recorded | Not Eligible |
| OVINGDEAN NATASHA | Mare | GREY | 22120 | Stud Book | Deceased | |
| OVINGDEAN NICHOLAS | Stallion | CHESTNUT | F14689 | 15/12/1977 | Foal Recorded | Not Eligible |
| OVINGDEAN NOOWEENA | Mare | GREY | 59678 | 29/12/1975 | Stud Book | Not Eligible |
| OVINGDEAN NURELEE | Mare | BAY | 46873 | 14/12/1976 | Stud Book | Deceased |
| OVINGDEAN RED ROBIN | Mare | BAY | 18863 | 01/08/1968 | Stud Book | Deceased |
| OVINGDEANS DILKARA | Gelding | CHESTNUT | 27413 | Stud Book | Not Eligible | |
| OWEN | Gelding | BAY | 53942 | 01/10/1976 | Stud Book | Not Eligible |
| OWEN DAWN | Mare | BAY | 34255 | 01/01/1974 | Stud Book | Not Eligible |
| OWEN DORIS | Mare | BAY | 34256 | 01/01/1974 | Stud Book | Not Eligible |
| OWEN DOWNS TANGO | Mare | BROWN | 13521 | Stud Book | Deceased | |
| OWEN IRIS | Mare | BAY | 34254 | 01/01/1973 | Stud Book | Not Eligible |
| OWEN JACKY | Mare | BAY | 34257 | 01/01/1975 | Stud Book | Not Eligible |
| OWEN MISTY | Gelding | GREY/ROAN | 63688 | 01/09/1978 | Stud Book | Not Eligible |
| OWEN SUSAN | Mare | BROWN | 35217 | 01/01/1969 | Stud Book | Deceased |
| OWENBROOK BANTAM | Gelding | BAY | 105516 | 01/10/1984 | Stud Book | Deceased |
| OWENDALE WESTMINSTER | Gelding | GREY | 29592 | 11/11/1971 | Stud Book | Deceased |
| OWERDALE CLEOPATRA | Mare | GREY | 45456 | 01/06/1969 | Stud Book | Deceased |
| OWLSRIDGE STEWIE | Gelding | BLACK | 252094 | 03/11/2018 | Stud Book | Not Eligible |
| OWN GIRL | Mare | BROWN | 7039 | 01/08/1967 | Stud Book | Deceased |
| OXBRA LAD | Stallion | BROWN | 144558 | 11/09/1999 | Stud Book | Deceased |
| OXBRA PARK ALLYS PRINCE | Stallion | BROWN/BLACK | 114730 | 19/10/1990 | Stud Book | Deceased |
| OXBRA PARK ALO BELLE | Mare | BAY | 114719 | 23/09/1990 | Stud Book | Deceased |
| OXBRA PARK BELLBOY | Gelding | BROWN | 104137 | 14/12/1987 | Stud Book | Not Eligible |
| OXBRA PARK CHINAS GIFT | Mare | CHESTNUT | 101455 | 04/01/1986 | Stud Book | Not Eligible |
| OXBRA PARK DELTA | Mare | BROWN | 162975 | 14/10/2004 | Stud Book | Not Eligible |
| OXBRA PARK GAYTIME | Mare | CHESTNUT | 70598 | 01/01/1981 | Stud Book | Not Eligible |
| OXBRA PARK JEZEBEL | Mare | BAY | 70440 | 08/10/1974 | Stud Book | Deceased |
| OXBRA PARK LUCILLE | Mare | BROWN | 161907 | 30/09/2002 | Stud Book | Not Eligible |
| OXBRA PARK NATHAN | Stallion | BROWN | 168068 | 10/10/2003 | Stud Book | Not Eligible |
| OXBRA PARK SADIE | Mare | BAY/BROWN | 78001 | 06/11/1991 | Stud Book | Deceased |
| OXBRA PARK SERENA - HSH | Mare | BROWN | 160759 | 23/08/2001 | Stud Book | Not Eligible |
| OXBRA PARK SUSIE | Mare | BROWN | 162976 | 19/09/2004 | Stud Book | Not Eligible |
| OXFORD ALFIE - HSH | Gelding | CHESTNUT | 189238 | 22/11/2008 | Stud Book | Eligible |
| OXFORD CINNAMON - HSH | Mare | CHESTNUT | 123494 | 15/12/1993 | Stud Book | Eligible |
| OXFORD DOWNS | Mare | BAY | 3106 | Stud Book | Deceased | |
| OXFORD ELLE - HSH | Mare | CHESTNUT | 123497 | 30/11/1992 | Stud Book | Deceased |
| OXFORD FLIRT - HSH | Mare | GREY | 186038 | 05/11/2007 | Stud Book | Not Eligible |
| OXFORD IMAGE - HSH | Mare | BLACK | 128647 | 29/12/1995 | Stud Book | Deceased |
| OXFORD LARA - HSH | Mare | BLACK | 194460 | 08/11/2010 | Stud Book | Not Eligible |
| OXFORD LARRIKIN - HSH | Stallion | BAY | 140352 | 16/10/1997 | Stud Book | Eligible |
| OXFORD MATILDA - HSH | Mare | CHESTNUT | 177025 | 10/03/2005 | Stud Book | Not Eligible |
| OXFORD MURPHY - HSH | Gelding | BLACK/GREY | 189236 | 04/11/2008 | Stud Book | Not Eligible |
| OXFORD NICOLETTE - HSH | Mare | BLACK/GREY | 191526 | 22/10/2009 | Stud Book | Not Eligible |
| OXFORD ROZIE - HSH | Mare | BAY | 236874 | 11/02/2015 | Stud Book | Deceased |
| OXFORD SABRINA - HSH | Mare | BAY | 155906 | 04/02/2001 | Stud Book | Not Eligible |
| OXFORD SCOUT - HSH | Stallion | GREY | 197675 | 29/11/2011 | Stud Book | Not Eligible |
| OXFORD STELLA - HSH | Mare | CHESTNUT | 162625 | 05/03/2002 | Stud Book | Not Eligible |
| OXFORD TABOO - HSH | Gelding | CHESTNUT | 124084 | 27/03/1993 | Stud Book | Not Eligible |
| OXFORD TALLAMORE PRINCE | Gelding | GREY | 64583 | 01/01/1977 | Stud Book | Not Eligible |
| OXFORD TICTOC | Mare | CHESTNUT/BAY | C1-262597 | 06/11/2021 | First Cross | Not Eligible |
| OXFORD TRUFFLE - HSH | Mare | GREY | 194461 | 08/11/2010 | Stud Book | Not Eligible |
| OXFORD VOODOO - HSH | Gelding | BLACK | 155907 | 01/10/2000 | Stud Book | Not Eligible |
| OXINA CINDY | Mare | GREY | 7211 | Stud Book | Deceased | |
| OXLEY DUKE | Gelding | GREY | 42792 | 05/12/1975 | Stud Book | Not Eligible |
| OXLEY FLIP | Mare | CHESTNUT | 3614 | Stud Book | Deceased | |
| OXLEY JEDDA | Mare | BLACK | 3615 | 01/08/1966 | Stud Book | Deceased |
| OXLEY LARA | Mare | BAY | 42073 | 01/01/1966 | Stud Book | Deceased |
| OXLEY LINNETT | Mare | CHESTNUT | 42793 | 27/12/1975 | Stud Book | Not Eligible |
| OXLEY MANOR JABULANI | Mare | GREY | C1-131274 | 17/10/1993 | First Cross | Not Eligible |
| OXLEY MANOR TAKARI | Mare | BROWN | 77567 | 01/08/1980 | Stud Book | Not Eligible |
| OXLEY MIRAGE | Mare | GREY | 25726 | Stud Book | Deceased | |
| OXLEY PARK BLAZE | Mare | CHESTNUT | 25531 | 03/10/1970 | Stud Book | Deceased |
| OXLEY PARK CHARISSMA | Mare | CHESTNUT/GREY | F31788 | 18/11/1981 | Foal Recorded | Not Eligible |
| OXLEY PARK CHERRY | Mare | GREY | 25530 | 06/10/1968 | Stud Book | Deceased |
| OXLEY PARK CONQUEST - HSH | Mare | BROWN | 192336 | 02/01/2003 | Stud Book | Eligible |
| OXLEY PARK CONTRACT - HSH | Mare | BLACK | 191865 | 20/10/2005 | Stud Book | Not Eligible |
| OXLEY PARK OAKS GINA | Mare | BAY | 139440 | 20/08/1995 | Stud Book | Not Eligible |
| OXLEY PARK POSSEM | Mare | GREY | 51821 | 01/10/1969 | Stud Book | Deceased |
| OXLEY PARK PRIDE | Mare | BAY | F25879 | 08/09/1980 | Foal Recorded | Not Eligible |
| OXLEY PARK RAINBOW LADY | Mare | GREY | 25532 | 15/09/1972 | Stud Book | Not Eligible |
| OXLEY PARK ROCKET | Gelding | BROWN | C1-146424 | 20/09/1996 | First Cross | Not Eligible |
| OXLEY PARK STAR | Mare | BLACK | 44290 | 01/01/1967 | Stud Book | Deceased |
| OXLEY PARK TANDARA | Mare | BAY | F31787 | 11/11/1981 | Foal Recorded | Not Eligible |
| OXLEY SUE | Mare | GREY | 25727 | Stud Book | Not Eligible | |
| OXLEY TROY | Gelding | CHESTNUT | 25728 | Stud Book | Not Eligible | |
| OXLEYPARK OAKS ARCHIE | Gelding | BAY | 236186 | 15/10/2013 | Stud Book | Not Eligible |