| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OSLAND PASTURES CARNEGIE | Gelding | CHESTNUT | 230711 | 29/11/2010 | Stud Book | Eligible |
| OSLAND PASTURES BETINA | Mare | BAY | 40539 | 01/01/1974 | Stud Book | Not Eligible |
| OSLAND PASTURES ARCHIE | Gelding | CHESTNUT | 241440 | 07/10/2015 | Stud Book | Not Eligible |
| OSLAND PASTURES APRIL - HSH | Mare | CHESTNUT | C2-186555 | 22/04/2008 | Second Cross | Not Eligible |
| OSLAND PASTURES ANGELA | Mare | BROWN | 241092 | 01/10/2012 | Stud Book | Not Eligible |
| OSLAND PASTURES AMELIA | Mare | BAY | 70361 | 01/12/1983 | Stud Book | Deceased |
| OSLAND PASTURES AMBASSADOR | Gelding | BLACK | 241091 | 19/11/2013 | Stud Book | Not Eligible |
| OSLAND PASTURES ACE | Gelding | BROWN | 135420 | 13/10/1995 | Stud Book | Deceased |
| OSLAND PASTURES ABILENE - HSH | Mare | BROWN | 156756 | 18/08/1995 | Stud Book | Eligible |
| OSHEA BROWN LADY | Mare | BROWN | 58802 | Stud Book | Not Eligible | |
| OSHEA | Mare | CHESTNUT | 55789 | 20/10/1976 | Stud Book | Not Eligible |
| OSHANNCESSY | Mare | BROWN | 21037 | 20/10/1966 | Stud Book | Deceased |
| OSFRAN CINDY | Mare | GREY | 9677 | Stud Book | Deceased | |
| OSDORP STARMAN | Gelding | BLACK | 269867 | 05/11/2023 | Stud Book | Eligible |
| OSDORP ROULETTE - HSH | Gelding | BAY | 255448 | 15/11/2016 | Stud Book | Eligible |
| OSDORP ISABELLE | Mare | BAY | 259822 | 09/11/2020 | Stud Book | Eligible |
| OSDORP APACHE | Gelding | BROWN/BLACK | 269868 | 14/11/2024 | Stud Book | Eligible |
| OSCHATZ | Mare | BROWN | 77275 | 03/11/1982 | Stud Book | Deceased |
| OSCARS DESTINY | Gelding | BROWN | C2-245338 | 01/09/2010 | Second Cross | Not Eligible |
| OSCAR WILD | Gelding | BAY | C2-241322 | 07/10/2014 | Second Cross | Eligible |
| OSCAR LE BEAU | Gelding | CHESTNUT | C1-250191 | 01/04/1984 | First Cross | Not Eligible |
| OSCAR LASS | Mare | CHESTNUT | 1770 | 01/08/1967 | Stud Book | Deceased |
| OSCAR | Gelding | BAY/BROWN | 70160 | 01/08/1979 | Stud Book | Not Eligible |
| OSBORNS GIDGET | Mare | BAY | 19210 | Stud Book | Deceased | |
| OSBORNE VALE ELITE | Mare | BROWN | 111247 | 18/11/1988 | Stud Book | Not Eligible |
| OS SPINNER | Mare | BROWN | 103975 | 01/12/1986 | Stud Book | Not Eligible |
| OS SINGER | Mare | BROWN | 103974 | 01/10/1985 | Stud Book | Not Eligible |
| OS LILLIE | Mare | BAY | 72965 | 01/10/1983 | Stud Book | Not Eligible |
| OS JAMICE | Mare | BROWN | 103976 | 01/08/1987 | Stud Book | Not Eligible |
| OS CONNIE | Mare | BROWN | 103973 | 01/11/1985 | Stud Book | Not Eligible |
| ORWELL TOP O THE MORNIN | Gelding | BROWN | C1-122747 | 27/11/1989 | First Cross | Not Eligible |
| ORWELL SWALLOW | Mare | CHESTNUT | 31569 | 01/11/1974 | Stud Book | Not Eligible |
| ORWELL MAYDAY | Mare | BLACK | 71934 | 20/11/1977 | Stud Book | Not Eligible |
| ORTBRUCHE PRISCILLA - HSH | Mare | BAY | 272026 | 29/11/2023 | Stud Book | Eligible |
| ORRS TULIP | Mare | CHESTNUT | 21549 | Stud Book | Deceased | |
| ORRO KIA | Gelding | BROWN/BLACK | 68200 | 10/10/1980 | Stud Book | Not Eligible |
| ORRELLS SILVER | Mare | GREY | 14789 | Stud Book | Deceased | |
| ORRELLS GLORY | Mare | GREY | 14790 | Stud Book | Deceased | |
| ORPHEOUS | Gelding | BROWN | 63418 | 16/12/1977 | Stud Book | Not Eligible |
| ORPHAN CONNIE | Mare | GREY | 38541 | 29/10/1974 | Stud Book | Not Eligible |
| ORPHAN BLUEY | Mare | PALOMINO | 19562 | Stud Book | Deceased | |
| ORPHAN ANNIE | Mare | GREY | 28516 | 11/11/1968 | Stud Book | Deceased |
| OROY AFFAIR | Mare | BAY | C1-264012 | 06/03/2015 | First Cross | Not Eligible |
| OROX | Stallion | CHESTNUT | 9010 | 01/08/1967 | Stud Book | Deceased |
| OROTONS DESTINY | Mare | CHESTNUT | C1-180686 | 16/10/2001 | First Cross | Eligible |
| ORO TIA MARIA - HSH | Mare | CHESTNUT | 116364 | 21/10/1991 | Stud Book | Eligible |
| ORO TEQUILA SUNRISE - HSH | Mare | PALOMINO | 111784 | 25/09/1988 | Stud Book | Deceased |
| ORO SUPER BRAT | Stallion | PALOMINO | SM-120349 | 17/11/1991 | Special Merit - Stud Book | Not Eligible |
| ORO GOLDEN HOPE - HSH | Mare | PALOMINO | 102840 | 19/10/1987 | Stud Book | Deceased |
| ORO GOLDEN CHIQUITA - HSH | Mare | PALOMINO | 116365 | 22/12/1990 | Stud Book | Deceased |
| ORO COCONUT - HSH | Mare | PALOMINO | 114854 | 23/10/1990 | Stud Book | Deceased |
| ORO BESS | Mare | BROWN | 23331 | Stud Book | Deceased | |
| ORO BANDA | Mare | CHESTNUT | 30311 | 02/08/1969 | Stud Book | Deceased |
| ORNUM PARK KALEENA | Mare | BROWN | 42690 | 01/01/1975 | Stud Book | Not Eligible |
| ORMOLU COPPER | Mare | CHESTNUT | 75382 | 10/09/1979 | Stud Book | Not Eligible |
| ORMIDALE PRINCESS | Mare | GREY | 21143 | 09/09/1971 | Stud Book | Deceased |
| ORMIDALE DUCHESS | Mare | BAY | 25910 | 01/01/1974 | Stud Book | Not Eligible |
| ORMIDALE CADET | Gelding | BROWN | 46013 | 12/12/1974 | Stud Book | Not Eligible |
| ORMADALE KING | Gelding | BAY | 35676 | 09/09/1972 | Stud Book | Not Eligible |
| ORLEAN | Gelding | BROWN | 26672 | Stud Book | Not Eligible | |
| ORLANGA TIMMY | Stallion | BAY | 194649 | 14/11/2010 | Stud Book | Not Eligible |
| ORLANGA REBA | Mare | BAY | 185714 | 30/08/2007 | Stud Book | Eligible |
| ORLANGA MK TEDDY | Gelding | BROWN/BLACK | 237536 | 09/09/2014 | Stud Book | Not Eligible |
| ORLANGA MK ROSETTE | Mare | BAY | C1-199598 | 03/01/2012 | First Cross | Not Eligible |
| ORLANGA MK POPCORN | Gelding | BAY | C1-199597 | 23/10/2011 | First Cross | Not Eligible |
| ORLANGA MK DELTA - HSH | Mare | BROWN | 233348 | 24/11/2013 | Stud Book | Not Eligible |
| ORLANGA MK COCONUT - HSH | Mare | BROWN | 241560 | 12/10/2015 | Stud Book | Not Eligible |
| ORLANGA JAZZ | Mare | CHESTNUT | 195753 | 29/02/2008 | Stud Book | Eligible |
| ORLANGA IMPACT | Gelding | CHESTNUT | 184647 | 02/08/2006 | Stud Book | Not Eligible |
| ORLANGA HOLLY | Mare | GREY | C1-196427 | 22/10/2006 | First Cross | Eligible |
| ORLANGA FENNESS - HSH | Mare | BAY | 184399 | 20/09/1991 | Stud Book | Deceased |
| ORLANGA DANNY BOY | Gelding | BROWN | 191170 | 05/11/2009 | Stud Book | Deceased |
| ORLANGA BOBBY BOY | Gelding | BAY | 184603 | 15/08/2006 | Stud Book | Not Eligible |
| ORLANGA ADAM | Stallion | BAY | SM-161663 | 23/11/2001 | Special Merit - Stud Book | Eligible |
| ORLANDOS GAMBLE | Mare | BLACK | 271653 | 16/11/2024 | Stud Book | Not Eligible |
| ORLANDOPARK SORRENTO GOLD | Gelding | PALOMINO | C1-171848 | 17/10/2002 | First Cross | Not Eligible |
| ORLANDOPARK IVORY N GOLD | Mare | PALOMINO | C1-171851 | 27/09/2001 | First Cross | Deceased |
| ORLANDOPARK FOCUS ON GOLD | Gelding | PALOMINO | C1-171847 | 31/10/2002 | First Cross | Not Eligible |
| ORLANDO BLOOM | Gelding | CHESTNUT | C2-236200 | 27/11/2012 | Second Cross | Eligible |
| ORLANDO | Gelding | BROWN | 14220 | 05/03/1964 | Stud Book | Deceased |
| ORION SOUVENIR | Mare | BLACK | F35702 | 10/09/1982 | Foal Recorded | Not Eligible |
| ORION RILL | Mare | CHESTNUT/ROAN | 54386 | Stud Book | Deceased | |
| ORION PADDY | Mare | BAY | 54385 | 01/03/1973 | Stud Book | Deceased |
| ORION LETOKA | Gelding | CHESTNUT | 63769 | 20/09/1980 | Stud Book | Not Eligible |
| ORION JUNITA | Mare | BAY | 48597 | 01/05/1977 | Stud Book | Deceased |
| ORION EL CAMPO CHRISTY | Mare | BAY | 57389 | 25/12/1976 | Stud Book | Not Eligible |
| ORION CITADELL | Mare | CHESTNUT | 104539 | 06/08/1984 | Stud Book | Not Eligible |
| ORION BONITA | Mare | CHESTNUT | F27018 | 23/02/1981 | Foal Recorded | Not Eligible |
| ORIOLE | Mare | BROWN | 56215 | 25/09/1969 | Stud Book | Deceased |
| ORINOCO | Gelding | CHESTNUT/GREY | F110920 | 04/12/1988 | Foal Recorded | Not Eligible |
| ORILEYS JULIETT - HSH | Mare | GREY | 179975 | 30/10/2006 | Stud Book | Eligible |
| ORIGIN | Mare | CHESTNUT | F113815 | 21/11/1989 | Foal Recorded | Not Eligible |
| ORIGAN | Mare | BROWN | 46336 | 01/08/1977 | Stud Book | Not Eligible |
| ORIENTAL | Gelding | BAY | 42167 | 17/03/1977 | Stud Book | Deceased |
| ORIENT STAR | Stallion | BAY | 5669 | 17/11/1965 | Stud Book | Deceased |
| ORIELLS OBSESSION | Mare | CHESTNUT | 77881 | 04/11/1989 | Stud Book | Not Eligible |
| ORIANT FANTASTIC | Gelding | CHESTNUT | 80644 | 20/02/1994 | Stud Book | Eligible |
| ORIANA TRISTI DOR | Mare | BAY/BLACK | 63966 | 01/10/1978 | Stud Book | Not Eligible |
| ORIANA GIRL | Mare | BAY | 34306 | 28/10/1966 | Stud Book | Deceased |
| ORIAD LASS | Mare | CHESTNUT | 47914 | 15/01/1976 | Stud Book | Not Eligible |