| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OSLAND PASTURES TRIXY | Mare | BLACK | 241446 | 14/11/2011 | Stud Book | Eligible |
| OSLAND PASTURES TWIGGY | Mare | BROWN | C1-186561 | 07/12/2006 | First Cross | Deceased |
| OSLAND PASTURES VAL - HSH | Mare | BROWN | 71022 | 02/11/1979 | Stud Book | Deceased |
| OSLAND PASTURES VALENTINE | Mare | CHESTNUT | 135421 | 20/11/1995 | Stud Book | Eligible |
| OSLAND PASTURES VALETTE | Mare | BLACK | 186552 | 29/09/2005 | Stud Book | Eligible |
| OSLAND PASTURES VALVOLINE - HSH | Mare | BROWN | 135419 | 16/12/1998 | Stud Book | Deceased |
| OSLAND PASTURES VEGAS | Stallion | CHESTNUT | 193047 | 20/11/2009 | Stud Book | Not Eligible |
| OSLANDS ABBEYS GIFT - HSH | Stallion | BLACK | 57762 | 24/01/1979 | Stud Book | Deceased |
| OSLANDS BELLE - HSH | Mare | BAY | 239 | 01/08/1964 | Stud Book | Deceased |
| OSLANDS DAWN - HSH | Mare | BAY | 681 | 01/08/1961 | Stud Book | Deceased |
| OSMOLITE | Mare | BAY | B2-234465 | 05/02/1999 | Breeding Purposes Only - Second Cross | Not Eligible |
| OSSETORY | Mare | CHESTNUT | 2369 | Stud Book | Deceased | |
| OSTAL | Gelding | BAY | 69604 | 01/08/1980 | Stud Book | Deceased |
| OSTEO HUSTLE - HSH | Gelding | BLACK/GREY | 268583 | 19/10/2019 | Stud Book | Eligible |
| OSTERLEY BRIGADOON | Gelding | BLACK | 111028 | 17/12/1988 | Stud Book | Deceased |
| OSTERLEY CAMEO | Mare | GREY | 220769 | 17/01/1988 | Stud Book | Not Eligible |
| OSTERLEY CELEBRATION | Gelding | CHESTNUT | 102794 | 01/01/1987 | Stud Book | Not Eligible |
| OSTERLEY FLAIR - HSH | Mare | BROWN | 116991 | 14/10/1992 | Stud Book | Not Eligible |
| OSTERLEY GIFT | Mare | CHESTNUT | 113668 | 03/09/1989 | Stud Book | Deceased |
| OSTERLEY GLOW | Mare | CHESTNUT | 76308 | 01/08/1981 | Stud Book | Deceased |
| OSTERLEY HAVANA | Gelding | BROWN | 116998 | 21/12/1994 | Stud Book | Eligible |
| OSTERLEY HIGHLIGHT | Stallion | CHESTNUT | F111027 | 01/08/1988 | Foal Recorded | Deceased |
| OSTERLEY IMPACT | Gelding | BROWN | 116988 | 13/11/1990 | Stud Book | Not Eligible |
| OSTERLEY JAVA - HSH | Stallion | BROWN | 133173 | 18/09/1996 | Stud Book | Not Eligible |
| OSTERLEY KISMET | Mare | GREY | 116990 | 13/10/1992 | Stud Book | Not Eligible |
| OSTERLEY MAGICAL | Gelding | GREY | 113667 | 16/09/1989 | Stud Book | Not Eligible |
| OSTERLEY MARCELLE | Mare | BROWN | 76309 | 30/10/1982 | Stud Book | Deceased |
| OSTERLEY REJOICE | Mare | BROWN/BLACK | 101660 | 17/12/1986 | Stud Book | Not Eligible |
| OSTERLEY ROMANCE | Mare | GREY | 106730 | 25/12/1986 | Stud Book | Not Eligible |
| OSTERLEY ROYALE | Gelding | BAY | 116986 | 20/09/1990 | Stud Book | Not Eligible |
| OSTERLEY SERENE | Mare | GREY | 76310 | 01/01/1975 | Stud Book | Not Eligible |
| OSTERLEY SILK - HSH | Mare | BROWN/BLACK | 111026 | 10/08/1988 | Stud Book | Not Eligible |
| OSTERLEY SPADES - HSH | Stallion | BROWN/BLACK | 111025 | 25/08/1987 | Stud Book | Not Eligible |
| OSTERLEY TABOO - HSH | Mare | BLACK | 116997 | 29/11/1994 | Stud Book | Not Eligible |
| OSTERLEY TRUMPS - HSH | Gelding | BROWN | 116987 | 20/10/1990 | Stud Book | Not Eligible |
| OSULLIVANS CASCADE | Gelding | CHESTNUT | 72094 | 01/08/1974 | Stud Book | Not Eligible |
| OSULLIVANS RUSS | Gelding | BUCKSKIN | 262123 | 15/11/2014 | Stud Book | Not Eligible |
| OSUZANA | Mare | BAY | 28558 | Stud Book | Deceased | |
| OTAGO ARCHENAR | Mare | GREY | 3481 | Stud Book | Deceased | |
| OTAGO TAMMY BRUCE | Mare | BROWN | 3480 | 01/01/1967 | Stud Book | Deceased |
| OTARRA CARIBOU | Stallion | BAY | F20078 | 15/10/1979 | Foal Recorded | Not Eligible |
| OTARRA KAMARI | Mare | CHESTNUT | 54172 | 28/07/1973 | Stud Book | Not Eligible |
| OTFORD VALEY APRIL - HSH | Mare | CHESTNUT | 182692 | 27/12/2005 | Stud Book | Eligible |
| OTFORDVALLEY ACRES OF CHROME | Gelding | CHESTNUT | 180692 | 20/09/2006 | Stud Book | Eligible |
| OTFORDVALLEY ANNIE | Mare | GREY | 193000 | 16/08/2009 | Stud Book | Not Eligible |
| OTFORDVALLEY APOLLO - HSH | Gelding | CHESTNUT | 189283 | 28/08/2008 | Stud Book | Eligible |
| OTFORDVALLEY BELLA | Mare | BLACK | 232119 | 17/10/2013 | Stud Book | Eligible |
| OTFORDVALLEY BELLE - HSH | Mare | CHESTNUT | 170108 | 06/11/2004 | Stud Book | Eligible |
| OTFORDVALLEY BINDY - HSH | Mare | CHESTNUT | 189284 | 10/10/2008 | Stud Book | Deceased |
| OTFORDVALLEY BRITTNEY - HSH | Mare | BLACK | 229083 | 20/09/2012 | Stud Book | Eligible |
| OTFORDVALLEY CADETTE - HSH | Mare | GREY | 173791 | 06/10/2004 | Stud Book | Not Eligible |
| OTFORDVALLEY CEDAR - HSH | Stallion | BLACK | 194184 | 13/10/2010 | Stud Book | Not Eligible |
| OTFORDVALLEY CHANEL - HSH | Mare | BROWN | 165838 | 24/12/2002 | Stud Book | Not Eligible |
| OTFORDVALLEY CHANTELE - HSH | Mare | CHESTNUT | 182691 | 15/08/2007 | Stud Book | Eligible |
| OTFORDVALLEY DUET - HSH | Mare | BAY | 180202 | 16/08/2005 | Stud Book | Eligible |
| OTFORDVALLEY EBONY - HSH | Mare | BLACK | 165840 | 30/11/2002 | Stud Book | Not Eligible |
| OTFORDVALLEY ECLIPSE | Gelding | BLACK | 191395 | 21/08/2009 | Stud Book | Eligible |
| OTFORDVALLEY ENIGMA - HSH | Gelding | PALOMINO/TAFFY | F165841 | 29/12/2002 | Foal Recorded | Not Eligible |
| OTFORDVALLEY HORNETS REVENGE - HSH | Gelding | GREY | 165848 | 26/02/2003 | Stud Book | Not Eligible |
| OTFORDVALLEY JACK - HSH | Gelding | BAY | 186358 | 27/12/2007 | Stud Book | Deceased |
| OTFORDVALLEY JARRAH - HSH | Gelding | BAY | 189282 | 12/11/2008 | Stud Book | Not Eligible |
| OTFORDVALLEY JEWEL | Mare | BROWN | 186356 | 12/09/2007 | Stud Book | Eligible |
| OTFORDVALLEY JOLYN - HSH | Mare | BAY | 182686 | 25/08/2006 | Stud Book | Eligible |
| OTFORDVALLEY JORDAN - HSH | Mare | BAY | 186357 | 10/08/2007 | Stud Book | Not Eligible |
| OTFORDVALLEY LUNAH - HSH | Mare | BLACK | 173567 | 07/08/2004 | Stud Book | Not Eligible |
| OTFORDVALLEY MAVERICK - HSH | Gelding | BAY | 189281 | 15/11/2008 | Stud Book | Deceased |
| OTFORDVALLEY MELODY - HSH | Mare | BAY | 174013 | 20/11/2005 | Stud Book | Eligible |
| OTFORDVALLEY MONIQUE - HSH | Mare | BAY | 174006 | 26/10/2004 | Stud Book | Eligible |
| OTFORDVALLEY MYSTERY - HSH | Stallion | GREY | 184727 | 04/11/2006 | Stud Book | Deceased |
| OTFORDVALLEY MYSTIQUE - HSH | Mare | BAY | 165387 | 12/12/2004 | Stud Book | Eligible |
| OTFORDVALLEY OAK - HSH | Stallion | BAY | 197894 | 03/12/2011 | Stud Book | Deceased |
| OTFORDVALLEY OLIVIA - HSH | Mare | BAY | 194544 | 12/09/2010 | Stud Book | Not Eligible |
| OTFORDVALLEY PARIS - HSH | Mare | BLACK | 182684 | 31/10/2006 | Stud Book | Eligible |
| OTFORDVALLEY PENNY - HSH | Mare | BAY | 194185 | 19/11/2009 | Stud Book | Eligible |
| OTFORDVALLEY PIVOT - HSH | Gelding | BAY | 174011 | 10/09/2005 | Stud Book | Not Eligible |
| OTFORDVALLEY REFLECTION | Gelding | BLACK | 197893 | 17/08/2011 | Stud Book | Not Eligible |
| OTFORDVALLEY RIVER PHOENIX - HSH | Mare | BROWN | 182685 | 03/09/2006 | Stud Book | Eligible |
| OTFORDVALLEY SAVANA - HSH | Mare | CHESTNUT | 197892 | 07/08/2011 | Stud Book | Not Eligible |
| OTFORDVALLEY SERENDIPITY - HSH | Mare | BROWN | 165839 | 11/10/2002 | Stud Book | Not Eligible |
| OTFORDVALLEY SHAKIRRA - HSH | Mare | GREY | 186355 | 20/12/2007 | Stud Book | Eligible |
| OTFORDVALLEY SLATER - HSH | Gelding | CHESTNUT | 169431 | 07/10/2004 | Stud Book | Not Eligible |
| OTFORDVALLEY SOLAR | Gelding | BLACK | 194818 | 04/08/2010 | Stud Book | Eligible |
| OTFORDVALLEY SUGAR | Mare | GREY | C2-174012 | 07/11/2005 | Second Cross | Eligible |
| OTFORDVALLEY WILLOW - HSH | Mare | BAY | 174010 | 28/12/2005 | Stud Book | Not Eligible |
| OTHELLO | Gelding | BLACK | 45497 | 01/01/1969 | Stud Book | Deceased |
| OTOE MIO | Mare | CHESTNUT | 72334 | 30/11/1981 | Stud Book | Not Eligible |
| OTOES BILLY BREEZE | Stallion | DUN | F38571 | 16/09/1984 | Foal Recorded | Not Eligible |
| OTOES MISS ROCK | Mare | CHESTNUT | 114813 | 29/08/1989 | Stud Book | Not Eligible |
| OTOES RUSTY SPOON | Mare | DUN | 76440 | 19/08/1978 | Stud Book | Not Eligible |
| OTTA HOWE | Mare | CHESTNUT | 31005 | 01/12/1973 | Stud Book | Not Eligible |
| OTTLEY ANN | Mare | CHESTNUT | 2773 | 01/01/1967 | Stud Book | Deceased |
| OTTLEY BANILLA | Mare | BROWN | 10653 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY BARBARA | Mare | BROWN | 10649 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY BERYL | Mare | CHESTNUT | 10646 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY BETTY | Mare | BAY | 10647 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY BEVERLEY | Mare | CHESTNUT | 10652 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY BONNY | Mare | BROWN | 2770 | 01/01/1968 | Stud Book | Deceased |
| OTTLEY CAMION | Mare | BROWN | 2774 | Stud Book | Deceased | |
| OTTLEY CHIMES | Mare | BROWN | 2769 | Stud Book | Deceased | |
| OTTLEY GLENEALY | Mare | CHESTNUT | 2771 | Stud Book | Deceased |