| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OXBRA PARK SUSIE | Mare | BROWN | 162976 | 19/09/2004 | Stud Book | Not Eligible |
| OXBRA PARK SERENA - HSH | Mare | BROWN | 160759 | 23/08/2001 | Stud Book | Not Eligible |
| OXBRA PARK SADIE | Mare | BAY/BROWN | 78001 | 06/11/1991 | Stud Book | Deceased |
| OXBRA PARK NATHAN | Stallion | BROWN | 168068 | 10/10/2003 | Stud Book | Not Eligible |
| OXBRA PARK LUCILLE | Mare | BROWN | 161907 | 30/09/2002 | Stud Book | Not Eligible |
| OXBRA PARK JEZEBEL | Mare | BAY | 70440 | 08/10/1974 | Stud Book | Deceased |
| OXBRA PARK GAYTIME | Mare | CHESTNUT | 70598 | 01/01/1981 | Stud Book | Not Eligible |
| OXBRA PARK DELTA | Mare | BROWN | 162975 | 14/10/2004 | Stud Book | Not Eligible |
| OXBRA PARK CHINAS GIFT | Mare | CHESTNUT | 101455 | 04/01/1986 | Stud Book | Not Eligible |
| OXBRA PARK BELLBOY | Gelding | BROWN | 104137 | 14/12/1987 | Stud Book | Not Eligible |
| OXBRA PARK ALO BELLE | Mare | BAY | 114719 | 23/09/1990 | Stud Book | Deceased |
| OXBRA PARK ALLYS PRINCE | Stallion | BROWN/BLACK | 114730 | 19/10/1990 | Stud Book | Deceased |
| OXBRA LAD | Stallion | BROWN | 144558 | 11/09/1999 | Stud Book | Deceased |
| OWN GIRL | Mare | BROWN | 7039 | 01/08/1967 | Stud Book | Deceased |
| OWLSRIDGE STEWIE | Gelding | BLACK | 252094 | 03/11/2018 | Stud Book | Not Eligible |
| OWERDALE CLEOPATRA | Mare | GREY | 45456 | 01/06/1969 | Stud Book | Deceased |
| OWENDALE WESTMINSTER | Gelding | GREY | 29592 | 11/11/1971 | Stud Book | Deceased |
| OWENBROOK BANTAM | Gelding | BAY | 105516 | 01/10/1984 | Stud Book | Deceased |
| OWEN SUSAN | Mare | BROWN | 35217 | 01/01/1969 | Stud Book | Deceased |
| OWEN MISTY | Gelding | GREY/ROAN | 63688 | 01/09/1978 | Stud Book | Not Eligible |
| OWEN JACKY | Mare | BAY | 34257 | 01/01/1975 | Stud Book | Not Eligible |
| OWEN IRIS | Mare | BAY | 34254 | 01/01/1973 | Stud Book | Not Eligible |
| OWEN DOWNS TANGO | Mare | BROWN | 13521 | Stud Book | Deceased | |
| OWEN DORIS | Mare | BAY | 34256 | 01/01/1974 | Stud Book | Not Eligible |
| OWEN DAWN | Mare | BAY | 34255 | 01/01/1974 | Stud Book | Not Eligible |
| OWEN | Gelding | BAY | 53942 | 01/10/1976 | Stud Book | Not Eligible |
| OVINGDEANS DILKARA | Gelding | CHESTNUT | 27413 | Stud Book | Not Eligible | |
| OVINGDEAN RED ROBIN | Mare | BAY | 18863 | 01/08/1968 | Stud Book | Deceased |
| OVINGDEAN NURELEE | Mare | BAY | 46873 | 14/12/1976 | Stud Book | Deceased |
| OVINGDEAN NOOWEENA | Mare | GREY | 59678 | 29/12/1975 | Stud Book | Not Eligible |
| OVINGDEAN NICHOLAS | Stallion | CHESTNUT | F14689 | 15/12/1977 | Foal Recorded | Not Eligible |
| OVINGDEAN NATASHA | Mare | GREY | 22120 | Stud Book | Deceased | |
| OVINGDEAN MISTER NOBODY | Stallion | BROWN/BLACK | F18850 | 12/10/1978 | Foal Recorded | Not Eligible |
| OVINGDEAN KINGSLY | Stallion | BAY | F14688 | 06/11/1977 | Foal Recorded | Not Eligible |
| OVINGDEAN KATRINA | Mare | BAY | 42321 | 27/11/1974 | Stud Book | Not Eligible |
| OVERTIME | Stallion | CHESTNUT | 24798 | 03/10/1972 | Stud Book | Deceased |
| OVERSTON SUE | Mare | BROWN | 45681 | Stud Book | Not Eligible | |
| OVERSTON RINGO | Stallion | BLACK | F19989 | 08/10/1978 | Foal Recorded | Not Eligible |
| OVERSTON BELINDA | Mare | GREY | 50096 | 01/10/1974 | Stud Book | Not Eligible |
| OVERSEER | Stallion | BAY | 553 | Stud Book | Deceased | |
| OVERSBY UP TOWN GIRL | Mare | BAY | C1-257251 | 10/01/2017 | First Cross | Eligible |
| OVERSBY HUSTLE FOR SOME ACRES | Gelding | BROWN | C1-272943 | 15/10/2024 | First Cross | Eligible |
| OVERNEWTON HONEY | Mare | BAY | 51624 | Stud Book | Deceased | |
| OVERLANDER PETER - HSH | Stallion | BLACK | F34645 | 25/11/1982 | Foal Recorded | Not Eligible |
| OVERLANDER BONITA - HSH | Mare | BAY/PIED | 45381 | 16/10/1976 | Stud Book | Deceased |
| OVERFLOW WAITAWHILE | Mare | BROWN/BLACK | 57892 | 14/01/1977 | Stud Book | Not Eligible |
| OVERFLOW TUPPENCE | Mare | BAY | F30839 | 14/01/1980 | Foal Recorded | Not Eligible |
| OVERFLOW ROCKETT - HSH | Mare | BLACK | 196722 | 07/01/1992 | Stud Book | Not Eligible |
| OVERFLOW DOWNS SO REAL | Mare | BAY/BROWN | 77463 | 01/08/1976 | Stud Book | Deceased |
| OVERFLOW DOWNS PURE GRACE | Mare | BAY | 139719 | 29/09/1991 | Stud Book | Deceased |
| OVERFLOW DOWNS JESSICA | Mare | CHESTNUT | 106015 | 28/09/1987 | Stud Book | Not Eligible |
| OVERFLOW DOWNS FLORENCE | Mare | CHESTNUT | F112071 | 04/09/1990 | Foal Recorded | Not Eligible |
| OVERFLOW DOWNS FINETTE | Mare | CHESTNUT | 105756 | 17/10/1985 | Stud Book | Deceased |
| OVERFLOW DOWNS CHECK MATE | Gelding | BAY | 112070 | 29/10/1989 | Stud Book | Not Eligible |
| OVEREXCEL | Mare | BUCKSKIN | C1-246848 | 15/10/2011 | First Cross | Eligible |
| OVERDRAFT - HSH | Mare | BAY | 178988 | 04/11/2002 | Stud Book | Eligible |
| OVERDENE MAGIC | Mare | BROWN | 71228 | 04/10/1981 | Stud Book | Not Eligible |
| OVERCASTE | Mare | BAY | 1239 | Stud Book | Deceased | |
| OVERANXIOUS | Mare | BROWN | 58432 | 15/10/1978 | Stud Book | Not Eligible |
| OVER THE MOON | Gelding | BAY | C2-234875 | 25/12/2006 | Second Cross | Not Eligible |
| OVER FLOW TEENA | Mare | BAY | 47165 | 01/05/1966 | Stud Book | Deceased |
| OVER FLOW REVET | Mare | BROWN | 57891 | 01/10/1975 | Stud Book | Not Eligible |
| OVER FLOW RED WINGS | Mare | CHESTNUT | 47167 | 01/01/1968 | Stud Book | Deceased |
| OVER FLOW PENNY | Mare | BAY | F21178 | 28/12/1978 | Foal Recorded | Not Eligible |
| OVER FLOW MODEL | Mare | BLACK | 47164 | Stud Book | Not Eligible | |
| OVER FLOW MISTRESS | Mare | CHESTNUT | 57894 | 01/10/1975 | Stud Book | Not Eligible |
| OVER FLOW MISFORTUNE | Mare | CHESTNUT | 47163 | Stud Book | Deceased | |
| OVER FLOW MISFIRE | Stallion | CHESTNUT | F20998 | 01/11/1978 | Foal Recorded | Not Eligible |
| OVER FLOW MID RULE | Stallion | BAY | 46596 | 13/09/1968 | Stud Book | Deceased |
| OVER FLOW JUDY | Mare | BLACK | 47168 | 01/01/1969 | Stud Book | Deceased |
| OVER FLOW JUDITH | Mare | BROWN | F21179 | 14/01/1979 | Foal Recorded | Not Eligible |
| OVER FLOW GOLD TOP | Gelding | GREY | 47166 | 01/01/1966 | Stud Book | Deceased |
| OVER FLOW DOWNS BLACK MISS | Mare | BLACK | 73273 | 01/01/1980 | Stud Book | Not Eligible |
| OVER FLOW BULIMBIA | Mare | BAY | 47169 | 01/01/1976 | Stud Book | Not Eligible |
| OVER FLOW BEVERLEY | Mare | BAY | 57893 | 01/09/1975 | Stud Book | Not Eligible |
| OVER DRAWN | Mare | BAY | 42905 | Stud Book | Deceased | |
| OVER DEW - HSH | Mare | BAY | 110341 | 03/12/1988 | Stud Book | Eligible |
| OVALTINE II | Gelding | BLACK | 75561 | 17/09/1983 | Stud Book | Deceased |
| OVAL R DUTCHESS | Mare | BLACK | 8597 | Stud Book | Deceased | |
| OUTTA THE BLUE | Gelding | BUCKSKIN | 243157 | 22/11/2015 | Stud Book | Eligible |
| OUTSPAN TRUE BLUE | Gelding | CHESTNUT | 128075 | 08/09/1996 | Stud Book | Eligible |
| OUTSPAN RIMFIRE | Gelding | BAY | 192584 | 31/01/2008 | Stud Book | Not Eligible |
| OUTSPAN DAINTY BESS | Mare | BAY/BROWN | 166342 | 03/11/2002 | Stud Book | Not Eligible |
| OUTRIGHT | Stallion | BROWN | 65644 | 30/08/1975 | Stud Book | Not Eligible |
| OUTRAGEOUS | Gelding | CHESTNUT | C1-169286 | 05/08/2001 | First Cross | Not Eligible |
| OUTLAW JANE | Mare | BROWN/BLACK | C1-262143 | 11/01/2018 | First Cross | Not Eligible |
| OUTLAW BONNIE - HSH | Mare | BROWN/BLACK | 253033 | 03/09/2018 | Stud Book | Eligible |
| OUTLAW | Gelding | BROWN | 25034 | 01/11/1970 | Stud Book | Deceased |
| OUTENABOUT | Mare | CHESTNUT | F29870 | 29/06/1981 | Foal Recorded | Not Eligible |
| OUTBOUND | Gelding | BROWN | 10340 | Stud Book | Deceased | |
| OUTBACK YNABLA ANTHEM - HSH | Mare | BAY/BROWN | 163997 | 10/09/2002 | Stud Book | Eligible |
| OUTBACK WHISTLER | Gelding | BLACK | 137878 | 10/09/1999 | Stud Book | Eligible |
| OUTBACK WHIRL AWAY | Gelding | BAY | 139569 | 20/10/1998 | Stud Book | Deceased |
| OUTBACK WEALTHY OVERSEER | Stallion | BAY | 127946 | 03/09/1995 | Stud Book | Deceased |
| OUTBACK UPPITEE - HSH | Mare | BAY | 157436 | 16/01/2001 | Stud Book | Deceased |
| OUTBACK SQUATTERS PRIDE - HSH | Gelding | BAY/GREY | 119960 | 27/10/1992 | Stud Book | Deceased |
| OUTBACK SISTER SERENA | Mare | BROWN | B2-255146 | 22/10/2007 | Breeding Purposes Only - Second Cross | Not Eligible |
| OUTBACK RUBICON | Stallion | CHESTNUT | 184761 | 11/09/2006 | Stud Book | Eligible |
| OUTBACK RENO - HSH | Gelding | BROWN | 255145 | 08/11/2015 | Stud Book | Not Eligible |
| OUTBACK QUEST - HSH | Mare | BROWN | 127045 | 16/04/1995 | Stud Book | Not Eligible |