| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| ORCA | Gelding | GREY | 50583 | 11/10/1974 | Stud Book | Not Eligible |
| ORCHID PATROL - HSH | Mare | CHESTNUT | 57036 | 18/09/1976 | Stud Book | Not Eligible |
| ORCHID RAY DEE | Mare | PALOMINO | C2-157596 | 01/09/2000 | Second Cross | Not Eligible |
| ORE BIN | Stallion | BROWN | 31018 | 13/09/1966 | Stud Book | Deceased |
| OREAKA | Mare | BAY | 1615 | 01/08/1969 | Stud Book | Deceased |
| OREGON CHIEF | Gelding | CHESTNUT | 63144 | 28/10/1978 | Stud Book | Not Eligible |
| OREGON RAY DEE - HSH | Mare | CHESTNUT | 121202 | 01/11/1992 | Stud Book | Deceased |
| OREILLYS ANNIE | Mare | BAY | 162568 | 20/10/1999 | Stud Book | Eligible |
| OREILLYS ANYTIME | Mare | CHESTNUT | 52665 | Stud Book | Not Eligible | |
| OREILLYS BLUE MELODY | Mare | BLACK/GREY | 267795 | 04/10/2019 | Stud Book | Eligible |
| OREILLYS BOXER - HSH | Gelding | BAY | 76418 | 28/08/1982 | Stud Book | Not Eligible |
| OREILLYS CASH CONDUCTOR | Gelding | BROWN | 229089 | 08/09/2010 | Stud Book | Eligible |
| OREILLYS CHANTELLE - HSH | Mare | CHESTNUT | 103951 | 19/09/1985 | Stud Book | Eligible |
| OREILLYS CINDY | Mare | CHESTNUT | SM-133888 | 07/01/1997 | Special Merit - Stud Book | Not Eligible |
| OREILLYS CONTACT | Mare | BAY/BROWN | 245306 | 03/09/2016 | Stud Book | Eligible |
| OREILLYS COOLABAH | Mare | CHESTNUT | 27795 | Stud Book | Not Eligible | |
| OREILLYS COVER GIRL | Mare | BAY | 185884 | 25/11/2006 | Stud Book | Not Eligible |
| OREILLYS DAWN | Mare | CHESTNUT | 21349 | Stud Book | Deceased | |
| OREILLYS DOUBLE O SEVEN | Gelding | CHESTNUT | 193428 | 11/11/2007 | Stud Book | Not Eligible |
| OREILLYS DOVE | Mare | BAY | 199901 | 19/10/2007 | Stud Book | Not Eligible |
| OREILLYS DUNTROON - HSH | Stallion | BROWN | 72509 | 29/09/1980 | Stud Book | Not Eligible |
| OREILLYS EBONY ROSE | Mare | BLACK | 232397 | 17/08/2009 | Stud Book | Eligible |
| OREILLYS EIGHTY EIGHT ACRES | Mare | BAY | 229017 | 08/11/2007 | Stud Book | Eligible |
| OREILLYS ERVINES MELODY | Mare | BROWN/GREY | 262428 | 01/10/2022 | Stud Book | Eligible |
| OREILLYS FOUR OAKS | Mare | BAY | 245305 | 22/09/2016 | Stud Book | Eligible |
| OREILLYS GENEVA | Gelding | CHESTNUT | 43052 | 01/01/1970 | Stud Book | Deceased |
| OREILLYS GOLDIELOCKS | Mare | BUCKSKIN | 254747 | 28/09/2016 | Stud Book | Eligible |
| OREILLYS HOLLY - HSH | Mare | CHESTNUT | 196937 | 19/08/1986 | Stud Book | Not Eligible |
| OREILLYS IMAGE - HSH | Mare | CHESTNUT | 162566 | 18/10/2000 | Stud Book | Eligible |
| OREILLYS JAMIE | Mare | CHESTNUT | F22754 | 07/12/1979 | Foal Recorded | Not Eligible |
| OREILLYS LEGACY | Gelding | BAY/BROWN | 185615 | 16/10/2006 | Stud Book | Eligible |
| OREILLYS MAC - HSH | Gelding | BROWN | 74517 | 28/11/1982 | Stud Book | Eligible |
| OREILLYS MAGGIE - HSH | Mare | BROWN | 162565 | 09/10/1989 | Stud Book | Eligible |
| OREILLYS MELODY | Mare | BAY | 169987 | 15/10/2003 | Stud Book | Eligible |
| OREILLYS MISS REDFORD | Mare | BAY | 199775 | 14/10/2008 | Stud Book | Not Eligible |
| OREILLYS MISTY | Mare | GREY | 52663 | Stud Book | Not Eligible | |
| OREILLYS REGRET | Mare | GREY | 254748 | 17/09/2016 | Stud Book | Eligible |
| OREILLYS SPORT GIRL | Mare | BROWN/BLACK | 233602 | 14/08/2012 | Stud Book | Not Eligible |
| OREILLYS SUSIE | Mare | BAY/BROWN | 166044 | 04/10/2003 | Stud Book | Eligible |
| OREILLYS TWINKLE | Mare | CHESTNUT | 43053 | 01/08/1971 | Stud Book | Deceased |
| OREILLYS UNDER COVER GIRL | Mare | CHESTNUT | 233603 | 01/08/2011 | Stud Book | Not Eligible |
| OREILLYS VALENTINE - HSH | Mare | CHESTNUT | 52664 | 01/08/1975 | Stud Book | Deceased |
| OREOCALLIS BENITA | Mare | BROWN | 122330 | 01/11/1991 | Stud Book | Not Eligible |
| OREOCALLIS DECKER | Gelding | BAY | 126040 | 15/08/1994 | Stud Book | Not Eligible |
| OREOCALLIS NINA | Mare | CHESTNUT | 118771 | 06/12/1990 | Stud Book | Not Eligible |
| OREOCALLIS SLATER | Gelding | BROWN | 123000 | 06/09/1993 | Stud Book | Not Eligible |
| ORESTELLE | Gelding | BUCKSKIN | C2-244859 | 22/10/2014 | Second Cross | Not Eligible |
| ORESTES | Stallion | CHESTNUT | 54584 | 13/12/1973 | Stud Book | Not Eligible |
| ORIAD LASS | Mare | CHESTNUT | 47914 | 15/01/1976 | Stud Book | Not Eligible |
| ORIANA GIRL | Mare | BAY | 34306 | 28/10/1966 | Stud Book | Deceased |
| ORIANA TRISTI DOR | Mare | BAY/BLACK | 63966 | 01/10/1978 | Stud Book | Not Eligible |
| ORIANT FANTASTIC | Gelding | CHESTNUT | 80644 | 20/02/1994 | Stud Book | Eligible |
| ORIELLS OBSESSION | Mare | CHESTNUT | 77881 | 04/11/1989 | Stud Book | Not Eligible |
| ORIENT STAR | Stallion | BAY | 5669 | 17/11/1965 | Stud Book | Deceased |
| ORIENTAL | Gelding | BAY | 42167 | 17/03/1977 | Stud Book | Deceased |
| ORIGAN | Mare | BROWN | 46336 | 01/08/1977 | Stud Book | Not Eligible |
| ORIGIN | Mare | CHESTNUT | F113815 | 21/11/1989 | Foal Recorded | Not Eligible |
| ORILEYS JULIETT - HSH | Mare | GREY | 179975 | 30/10/2006 | Stud Book | Eligible |
| ORINOCO | Gelding | CHESTNUT/GREY | F110920 | 04/12/1988 | Foal Recorded | Not Eligible |
| ORIOLE | Mare | BROWN | 56215 | 25/09/1969 | Stud Book | Deceased |
| ORION BONITA | Mare | CHESTNUT | F27018 | 23/02/1981 | Foal Recorded | Not Eligible |
| ORION CITADELL | Mare | CHESTNUT | 104539 | 06/08/1984 | Stud Book | Not Eligible |
| ORION EL CAMPO CHRISTY | Mare | BAY | 57389 | 25/12/1976 | Stud Book | Not Eligible |
| ORION JUNITA | Mare | BAY | 48597 | 01/05/1977 | Stud Book | Deceased |
| ORION LETOKA | Gelding | CHESTNUT | 63769 | 20/09/1980 | Stud Book | Not Eligible |
| ORION PADDY | Mare | BAY | 54385 | 01/03/1973 | Stud Book | Deceased |
| ORION RILL | Mare | CHESTNUT/ROAN | 54386 | Stud Book | Deceased | |
| ORION SOUVENIR | Mare | BLACK | F35702 | 10/09/1982 | Foal Recorded | Not Eligible |
| ORLANDO | Gelding | BROWN | 14220 | 05/03/1964 | Stud Book | Deceased |
| ORLANDO BLOOM | Gelding | CHESTNUT | C2-236200 | 27/11/2012 | Second Cross | Eligible |
| ORLANDOPARK FOCUS ON GOLD | Gelding | PALOMINO | C1-171847 | 31/10/2002 | First Cross | Not Eligible |
| ORLANDOPARK IVORY N GOLD | Mare | PALOMINO | C1-171851 | 27/09/2001 | First Cross | Deceased |
| ORLANDOPARK SORRENTO GOLD | Gelding | PALOMINO | C1-171848 | 17/10/2002 | First Cross | Not Eligible |
| ORLANDOS GAMBLE | Mare | BLACK | 271653 | 16/11/2024 | Stud Book | Eligible |
| ORLANGA ADAM | Stallion | BAY | SM-161663 | 23/11/2001 | Special Merit - Stud Book | Eligible |
| ORLANGA BOBBY BOY | Gelding | BAY | 184603 | 15/08/2006 | Stud Book | Not Eligible |
| ORLANGA DANNY BOY | Gelding | BROWN | 191170 | 05/11/2009 | Stud Book | Deceased |
| ORLANGA FENNESS - HSH | Mare | BAY | 184399 | 20/09/1991 | Stud Book | Deceased |
| ORLANGA HOLLY | Mare | GREY | C1-196427 | 22/10/2006 | First Cross | Eligible |
| ORLANGA IMPACT | Gelding | CHESTNUT | 184647 | 02/08/2006 | Stud Book | Not Eligible |
| ORLANGA JAZZ | Mare | CHESTNUT | 195753 | 29/02/2008 | Stud Book | Not Eligible |
| ORLANGA MK COCONUT - HSH | Mare | BROWN | 241560 | 12/10/2015 | Stud Book | Eligible |
| ORLANGA MK DELTA - HSH | Mare | BROWN | 233348 | 24/11/2013 | Stud Book | Not Eligible |
| ORLANGA MK POPCORN | Gelding | BAY | C1-199597 | 23/10/2011 | First Cross | Eligible |
| ORLANGA MK ROSETTE | Mare | BAY | C1-199598 | 03/01/2012 | First Cross | Eligible |
| ORLANGA MK TEDDY | Gelding | BROWN/BLACK | 237536 | 09/09/2014 | Stud Book | Eligible |
| ORLANGA REBA | Mare | BAY | 185714 | 30/08/2007 | Stud Book | Eligible |
| ORLANGA TIMMY | Stallion | BAY | 194649 | 14/11/2010 | Stud Book | Not Eligible |
| ORLEAN | Gelding | BROWN | 26672 | Stud Book | Not Eligible | |
| ORMADALE KING | Gelding | BAY | 35676 | 09/09/1972 | Stud Book | Not Eligible |
| ORMIDALE CADET | Gelding | BROWN | 46013 | 12/12/1974 | Stud Book | Not Eligible |
| ORMIDALE DUCHESS | Mare | BAY | 25910 | 01/01/1974 | Stud Book | Not Eligible |
| ORMIDALE PRINCESS | Mare | GREY | 21143 | 09/09/1971 | Stud Book | Deceased |
| ORMOLU COPPER | Mare | CHESTNUT | 75382 | 10/09/1979 | Stud Book | Not Eligible |
| ORNUM PARK KALEENA | Mare | BROWN | 42690 | 01/01/1975 | Stud Book | Not Eligible |
| ORO BANDA | Mare | CHESTNUT | 30311 | 02/08/1969 | Stud Book | Deceased |
| ORO BESS | Mare | BROWN | 23331 | Stud Book | Deceased | |
| ORO COCONUT - HSH | Mare | PALOMINO | 114854 | 23/10/1990 | Stud Book | Deceased |
| ORO GOLDEN CHIQUITA - HSH | Mare | PALOMINO | 116365 | 22/12/1990 | Stud Book | Deceased |
| ORO GOLDEN HOPE - HSH | Mare | PALOMINO | 102840 | 19/10/1987 | Stud Book | Deceased |