| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OBRIENS MINUETTE | Mare | BAY | 10974 | Stud Book | Deceased | |
| OBRIENS MONUETTE | Gelding | CHESTNUT | 51888 | 18/12/1977 | Stud Book | Not Eligible |
| OBRIENS MUNDINE | Gelding | BROWN | C1-248863 | 02/12/2014 | First Cross | Eligible |
| OBRIENS NONAMEYETTE - HSH | Gelding | BROWN | 167135 | 30/09/2002 | Stud Book | Eligible |
| OBRIENS NUGGET | Gelding | BROWN | 258256 | 24/06/2013 | Stud Book | Eligible |
| OBRIENS OZETTE - HSH | Stallion | BROWN/BLACK | 196056 | 05/11/2010 | Stud Book | Eligible |
| OBRIENS PALETTE | Gelding | BROWN | 185636 | 23/08/2007 | Stud Book | Not Eligible |
| OBRIENS PEDRO | Gelding | GREY | 70336 | 01/09/1971 | Stud Book | Deceased |
| OBRIENS PIROUETTE | Mare | CHESTNUT | 48151 | 25/12/1974 | Stud Book | Deceased |
| OBRIENS POLYESTER | Mare | BAY | 244952 | 10/11/2011 | Stud Book | Not Eligible |
| OBRIENS PROSPECT - HSH | Gelding | BAY/BROWN | 133379 | 02/12/1995 | Stud Book | Deceased |
| OBRIENS PYRETTE | Gelding | BAY | 235614 | 02/12/2011 | Stud Book | Eligible |
| OBRIENS QUAKETTE | Mare | BROWN/BLACK | 116738 | 28/12/1989 | Stud Book | Not Eligible |
| OBRIENS RED CHAN - HSH | Gelding | BAY | 72366 | 01/01/1984 | Stud Book | Deceased |
| OBRIENS REDETTE - HSH | Gelding | CHESTNUT | 256004 | 20/12/2016 | Stud Book | Eligible |
| OBRIENS REFINE | Gelding | CHESTNUT | 234597 | 30/10/2013 | Stud Book | Eligible |
| OBRIENS REGRETTE - HSH | Mare | BLACK | 253203 | 15/12/2016 | Stud Book | Eligible |
| OBRIENS REMINISE | Mare | BAY | 248889 | 01/11/2014 | Stud Book | Eligible |
| OBRIENS RESETTE | Stallion | BAY | 187115 | 20/10/2005 | Stud Book | Eligible |
| OBRIENS RINGLETTE - HSH | Mare | BAY | 189623 | 10/10/2006 | Stud Book | Deceased |
| OBRIENS RIVOLETTE - HSH | Gelding | CHESTNUT | 52618 | 01/03/1975 | Stud Book | Deceased |
| OBRIENS ROCKETTE - HSH | Gelding | BAY | 260530 | 12/10/2016 | Stud Book | Not Eligible |
| OBRIENS ROSETTE | Mare | BLACK | 166402 | 02/11/2002 | Stud Book | Eligible |
| OBRIENS ROULETTE | Gelding | CHESTNUT | 11648 | Stud Book | Deceased | |
| OBRIENS SAVANNAH | Mare | BLACK | 132262 | 25/11/1996 | Stud Book | Not Eligible |
| OBRIENS SCARLETTE - HSH | Mare | CHESTNUT | F128327 | 23/12/1994 | Foal Recorded | Not Eligible |
| OBRIENS SHARLETTE - HSH | Mare | BROWN | 249896 | 02/12/2015 | Stud Book | Eligible |
| OBRIENS SHAUNETTE - HSH | Gelding | GREY | 67942 | 06/01/1977 | Stud Book | Deceased |
| OBRIENS SONNETTE - HSH | Mare | BROWN | 67941 | 13/11/1980 | Stud Book | Deceased |
| OBRIENS SPARKLE | Mare | BROWN | C1-187194 | 01/10/1996 | First Cross | Eligible |
| OBRIENS SPARKNOAK | Gelding | BAY | C2-187195 | 01/11/2003 | Second Cross | Eligible |
| OBRIENS STARLETTE | Mare | BROWN/BLACK | 252607 | 04/12/2016 | Stud Book | Eligible |
| OBRIENS STATUETTE | Gelding | BROWN | 119448 | 18/08/1990 | Stud Book | Eligible |
| OBRIENS STORM | Mare | GREY | 258687 | 23/04/2015 | Stud Book | Eligible |
| OBRIENS SUNSETTE | Mare | BAY | 167137 | 14/10/2002 | Stud Book | Eligible |
| OBRIENS SUSETTE - HSH | Mare | CHESTNUT | 44355 | 29/01/1976 | Stud Book | Deceased |
| OBRIENS SWANREACH SOLITAIRE | Gelding | BAY | C1-193444 | 02/12/2004 | First Cross | Not Eligible |
| OBRIENS TINY | Gelding | BROWN/BLACK | C1-258059 | 20/10/2016 | First Cross | Eligible |
| OBRIENS TRANQUILETTE | Mare | GREY | 48421 | 29/01/1976 | Stud Book | Deceased |
| OBRIENS TRENDSETTE - HSH | Mare | BROWN | 234598 | 15/11/2013 | Stud Book | Eligible |
| OBRIENS TRUDETTE | Mare | BROWN | 126042 | 17/11/1993 | Stud Book | Eligible |
| OBRIENS TYSON | Gelding | BAY | C1-248864 | 26/11/2014 | First Cross | Not Eligible |
| OBRIENS VEDETTE - HSH | Stallion | BROWN | 161200 | 08/12/2000 | Stud Book | Eligible |
| OBRIENS VELVETTE | Mare | BROWN/BLACK | 193929 | 06/10/2007 | Stud Book | Eligible |
| OBRIENS VOODETTE - HSH | Mare | BROWN/BLACK | 239252 | 29/10/2011 | Stud Book | Eligible |
| OBRIENS WATCHETTE - HSH | Mare | DUN | 248830 | 05/11/2011 | Stud Book | Eligible |
| OBVIATE | Gelding | BAY | SM-250271 | 04/11/1993 | Special Merit - Stud Book | Not Eligible |
| OCANNER | Mare | BAY | 9520 | Stud Book | Deceased | |
| OCEAN AFFAIR | Mare | BROWN | 155384 | 24/12/2000 | Stud Book | Not Eligible |
| OCEAN ALBA - HSH | Gelding | BLACK | 241933 | 15/12/2015 | Stud Book | Not Eligible |
| OCEAN BANDI - HSH | Gelding | BAY | 142799 | 19/01/1996 | Stud Book | Not Eligible |
| OCEAN BELLA | Mare | BROWN | 156606 | 26/02/2003 | Stud Book | Eligible |
| OCEAN BLUE | Stallion | CHESTNUT | 155812 | 11/11/2002 | Stud Book | Deceased |
| OCEAN BOB ACRE | Gelding | BROWN | 163512 | 27/12/2002 | Stud Book | Not Eligible |
| OCEAN BRONCO - HSH | Gelding | BAY | 144715 | 05/10/1999 | Stud Book | Not Eligible |
| OCEAN BRONZE | Stallion | CHESTNUT | F39891 | 18/10/1984 | Foal Recorded | Not Eligible |
| OCEAN CALM - HSH | Stallion | BAY | F124821 | 27/12/1993 | Foal Recorded | Deceased |
| OCEAN CHANEL | Mare | BAY | 245814 | 25/11/2016 | Stud Book | Eligible |
| OCEAN CHESTER | Gelding | BROWN | 156501 | 25/11/2008 | Stud Book | Not Eligible |
| OCEAN CHIME | Mare | CHESTNUT | 156500 | 04/12/2008 | Stud Book | Eligible |
| OCEAN CHINA | Mare | BLACK | 239248 | 10/11/2008 | Stud Book | Eligible |
| OCEAN CHISHOLM | Gelding | BROWN/BLACK | C2-156499 | 02/01/2009 | Second Cross | Not Eligible |
| OCEAN CIRCLE - HSH | Gelding | BROWN | 257044 | 14/10/2016 | Stud Book | Eligible |
| OCEAN COAST - HSH | Gelding | BROWN | 163523 | 29/11/2002 | Stud Book | Not Eligible |
| OCEAN CROW - HSH | Gelding | BLACK/GREY | 140355 | 10/10/1998 | Stud Book | Deceased |
| OCEAN DALE | Mare | GREY | 33695 | Stud Book | Not Eligible | |
| OCEAN DARKEY | Gelding | BLACK | 266221 | 14/12/2019 | Stud Book | Eligible |
| OCEAN DARREN | Gelding | BLACK | 256893 | 24/01/2018 | Stud Book | Not Eligible |
| OCEAN DAWN - HSH | Mare | BAY/BROWN | 124820 | 07/11/1993 | Stud Book | Eligible |
| OCEAN DECOY - HSH | Stallion | BAY | F144720 | 07/10/1998 | Foal Recorded | Deceased |
| OCEAN DELAY | Mare | CHESTNUT | 155381 | 01/01/2001 | Stud Book | Eligible |
| OCEAN DELTA | Mare | GREY | 260144 | 02/02/2008 | Stud Book | Eligible |
| OCEAN DEMISE - HSH | Stallion | BROWN | 111163 | 17/09/1989 | Stud Book | Deceased |
| OCEAN DETAIL - HSH | Stallion | CHESTNUT | 131076 | 23/11/1994 | Stud Book | Not Eligible |
| OCEAN DETROIT - HSH | Mare | BAY | 156490 | 07/10/2007 | Stud Book | Not Eligible |
| OCEAN DEXTER - HSH | Gelding | BROWN | 156491 | 28/12/2007 | Stud Book | Not Eligible |
| OCEAN DIVA - HSH | Mare | BAY | 190500 | 05/10/2004 | Stud Book | Eligible |
| OCEAN DRIVE - HSH | Gelding | BAY | 149551 | 30/10/1999 | Stud Book | Not Eligible |
| OCEAN DULUX | Gelding | CHESTNUT/ROAN | C2-258118 | 19/12/2011 | Second Cross | Eligible |
| OCEAN DUSK - HSH | Mare | BAY | 144712 | 02/02/1999 | Stud Book | Not Eligible |
| OCEAN EXPIRE | Mare | BAY | 230768 | 23/10/2009 | Stud Book | Not Eligible |
| OCEAN EXPLOIT | Gelding | BROWN/GREY | 156497 | 01/01/2010 | Stud Book | Not Eligible |
| OCEAN EXPO | Gelding | BAY | C2-193380 | 09/01/2010 | Second Cross | Not Eligible |
| OCEAN EXPRESS | Gelding | CHESTNUT | 156496 | 25/10/2009 | Stud Book | Not Eligible |
| OCEAN EXTRA | Mare | CHESTNUT | 239495 | 15/12/2009 | Stud Book | Not Eligible |
| OCEAN GERTIE - HSH | Mare | BAY | 241935 | 22/12/2015 | Stud Book | Eligible |
| OCEAN GETTO - HSH | Gelding | BAY | 241936 | 19/12/2015 | Stud Book | Eligible |
| OCEAN GRIZZLY | Gelding | CHESTNUT | 145216 | 05/10/1999 | Stud Book | Not Eligible |
| OCEAN IDYLL | Gelding | BROWN | 144711 | 28/01/1999 | Stud Book | Deceased |
| OCEAN JACKPOT | Gelding | BAY | C2-176831 | 20/10/2005 | Second Cross | Deceased |
| OCEAN JETSET | Gelding | BLACK | 235967 | 18/11/2012 | Stud Book | Not Eligible |
| OCEAN JETSTAR | Mare | BROWN/BLACK | 235775 | 24/11/2014 | Stud Book | Not Eligible |
| OCEAN JEWEL | Mare | CHESTNUT | C2-156600 | 08/10/2001 | Second Cross | Not Eligible |
| OCEAN JIVE | Mare | BROWN | 138789 | 21/10/1997 | Stud Book | Not Eligible |
| OCEAN JULACRE | Mare | BROWN | 239249 | 17/11/2014 | Stud Book | Eligible |
| OCEAN JULENA | Mare | BLACK/GREY | 156425 | 12/01/2002 | Stud Book | Eligible |
| OCEAN LEVI - HSH | Gelding | BAY | 245815 | 05/12/2016 | Stud Book | Eligible |
| OCEAN LOUI | Gelding | BLACK | 245816 | 05/10/2016 | Stud Book | Not Eligible |
| OCEAN MACINTYRE - HSH | Gelding | BROWN | 138115 | 03/11/1996 | Stud Book | Not Eligible |
| OCEAN MAGIC | Mare | BAY | 75978 | 04/10/1983 | Stud Book | Not Eligible |