| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| OGGIE | Mare | BAY | 106430 | 06/10/1982 | Stud Book | Deceased |
| OGILIVES LEA | Mare | BROWN | 73741 | 18/11/1984 | Stud Book | Not Eligible |
| OGILVIE | Gelding | BAY | 58399 | Stud Book | Not Eligible | |
| OGILVYS QUARTPOT | Mare | CHESTNUT | 28071 | 01/08/1961 | Stud Book | Deceased |
| OGLE SEA STAR | Mare | CHESTNUT | 24980 | 10/09/1968 | Stud Book | Deceased |
| OGO CHARLOTTE | Mare | BUCKSKIN | 175831 | 16/10/2005 | Stud Book | Eligible |
| OGO CHARLY SPIN | Mare | CHESTNUT | 175832 | 17/11/2003 | Stud Book | Not Eligible |
| OGO CHERRY LEE | Mare | CHESTNUT | 113589 | 11/12/1989 | Stud Book | Deceased |
| OGO COLONEL CADET | Stallion | CHESTNUT | 149423 | 05/08/1995 | Stud Book | Not Eligible |
| OGO CRUISE TECH - HSH | Gelding | BROWN | 190675 | 02/01/2007 | Stud Book | Not Eligible |
| OGO DIESEL | Stallion | GREY | 119320 | 29/12/1992 | Stud Book | Deceased |
| OGO ENNA SWAG | Mare | BROWN | 126701 | 10/03/1994 | Stud Book | Not Eligible |
| OGO JAZZMAN | Mare | BAY | 113588 | 06/11/1989 | Stud Book | Eligible |
| OGO JESSY ROSE - HSH | Mare | CHESTNUT | 150226 | 23/09/1999 | Stud Book | Not Eligible |
| OGO JOHNNY XMAS | Gelding | CHESTNUT | 160978 | 25/12/1997 | Stud Book | Not Eligible |
| OGO MIMIC BLUE | Mare | GREY | 160981 | 20/12/1998 | Stud Book | Not Eligible |
| OGO TOM BOY | Gelding | CHESTNUT | 160979 | 01/11/2000 | Stud Book | Deceased |
| OGOLDY | Mare | CHESTNUT | 29860 | 01/01/1969 | Stud Book | Deceased |
| OGY | Gelding | BROWN | 11723 | 01/01/1968 | Stud Book | Deceased |
| OH BOY | Gelding | BAY | 71343 | 01/01/1978 | Stud Book | Not Eligible |
| OH DANNY BOY | Gelding | CHESTNUT | 35191 | 03/08/1972 | Stud Book | Deceased |
| OH HOUSTON | Mare | BAY | C1-258459 | 28/08/2017 | First Cross | Eligible |
| OH NO | Mare | GREY | 811 | Stud Book | Deceased | |
| OH SO FANCY | Mare | CHESTNUT | 68983 | 19/09/1980 | Stud Book | Not Eligible |
| OH SO FROSTY | Gelding | ROAN | C2-229322 | 27/09/2010 | Second Cross | Eligible |
| OH SO SMART | Mare | BUCKSKIN | C1-247837 | 01/02/2014 | First Cross | Eligible |
| OHANA HOMESTEAD TIMETRAVELLER | Gelding | BLACK/ROAN | C1-263136 | 22/10/2018 | First Cross | Not Eligible |
| OHARAS SERENA | Mare | BLACK | 25899 | 01/10/1966 | Stud Book | Deceased |
| OHAYCEE BAYMAX | Gelding | BLACK/GREY | C1-245599 | 08/10/2015 | First Cross | Eligible |
| OHAYCEE BLUEISH | Gelding | BLACK/ROAN | R-267801 | 08/10/2022 | Base Registry | Eligible |
| OHAYCEE BONNIE DUCK | Mare | BLACK | C2-257354 | 14/10/2019 | Second Cross | Eligible |
| OHAYCEE BOULET | Stallion | BROWN | C2-237472 | 13/10/2014 | Second Cross | Eligible |
| OHAYCEE COLDPLAY | Gelding | BROWN | C2-230695 | 04/11/2012 | Second Cross | Not Eligible |
| OHAYCEE CURTIS | Gelding | BROWN | C1-266060 | 06/11/2020 | First Cross | Eligible |
| OHAYCEE DALEY BILL | Gelding | BAY | R-273903 | 07/12/2023 | Base Registry | Eligible |
| OHAYCEE DEFINITELY FAMOUS | Mare | BROWN | B2-272840 | 14/08/2019 | Breeding Purposes Only - Second Cross | Not Eligible |
| OHAYCEE DEMI MOORE | Mare | BROWN | C1-262923 | 25/10/2021 | First Cross | Not Eligible |
| OHAYCEE DROPLETT | Mare | BAY | C1-193149 | 13/12/2003 | First Cross | Eligible |
| OHAYCEE ELLA BAE | Mare | BAY | R-263792 | 01/09/2021 | Base Registry | Not Eligible |
| OHAYCEE ENTIRELY MOORE | Mare | BROWN | C2-246215 | 13/10/2016 | Second Cross | Eligible |
| OHAYCEE EVE | Mare | BROWN | C2-233822 | 24/12/2013 | Second Cross | Eligible |
| OHAYCEE GALLAGHER | Gelding | BROWN | 270311 | 27/09/2023 | Stud Book | Eligible |
| OHAYCEE GEORGIE GIRL | Mare | CHESTNUT | C1-241812 | 10/11/2013 | First Cross | Eligible |
| OHAYCEE HALEN | Gelding | BAY | C2-265252 | 19/03/2021 | Second Cross | Eligible |
| OHAYCEE HAMMER | Stallion | BLACK | R-267800 | 25/09/2022 | Base Registry | Eligible |
| OHAYCEE HENDRIX | Gelding | BROWN | C2-258545 | 11/12/2020 | Second Cross | Not Eligible |
| OHAYCEE JACQUELINE | Mare | BAY | C1-176071 | 01/11/2006 | First Cross | Eligible |
| OHAYCEE JEZZABELLE | Mare | BAY | C2-195568 | 24/10/2007 | Second Cross | Eligible |
| OHAYCEE KOHLI | Stallion | BROWN | 252847 | 19/01/2019 | Stud Book | Eligible |
| OHAYCEE ODARREN | Gelding | CHESTNUT | 252848 | 29/09/2018 | Stud Book | Eligible |
| OHAYCEE RARITY | Stallion | BROWN/BLACK | C2-247365 | 23/12/2017 | Second Cross | Eligible |
| OHAYCEE REMEMBRANCE | Mare | BAY | C2-193767 | 11/11/2008 | Second Cross | Eligible |
| OHAYCEE REYN BEAU | Gelding | BROWN | C2-198608 | 12/09/2011 | Second Cross | Eligible |
| OHAYCEE RIELLE | Mare | BAY | C2-237473 | 30/11/2014 | Second Cross | Eligible |
| OHAYCEE SASHA | Mare | BROWN/BLACK | C1-245600 | 12/11/2016 | First Cross | Not Eligible |
| OHAYCEE VAMIKA | Mare | BAY | C1-270259 | 17/09/2023 | First Cross | Eligible |
| OHIO | Gelding | GREY | 10091 | Stud Book | Deceased | |
| OHIO BESS - HSH | Mare | BLACK | 42353 | 01/08/1975 | Stud Book | Not Eligible |
| OHIO BROWNIE | Mare | BAY | F8610 | 27/10/1976 | Foal Recorded | Not Eligible |
| OHIO CARNATION | Mare | CHESTNUT | 28319 | 11/12/1970 | Stud Book | Deceased |
| OHIO CHANCE | Mare | BAY | 5246 | Stud Book | Deceased | |
| OHIO CHEERS | Mare | CHESTNUT | 42352 | 01/01/1973 | Stud Book | Not Eligible |
| OHIO CINDY | Mare | CHESTNUT | 46391 | 17/11/1975 | Stud Book | Not Eligible |
| OHIO DUTCHESS | Mare | BLACK | 33345 | Stud Book | Not Eligible | |
| OHIO ELLA | Mare | CHESTNUT | 52280 | 11/10/1977 | Stud Book | Not Eligible |
| OHIO FLASHLIGHT | Mare | CHESTNUT | F6794 | 26/03/1977 | Foal Recorded | Not Eligible |
| OHIO GREYLIGHT - HSH | Gelding | GREY | 19311 | 12/11/1972 | Stud Book | Not Eligible |
| OHIO HAZE | Mare | CHESTNUT | 123069 | 24/09/1992 | Stud Book | Not Eligible |
| OHIO JANE | Mare | BROWN | 42354 | 04/09/1973 | Stud Book | Deceased |
| OHIO JEANETTE | Mare | CHESTNUT | 64257 | 01/11/1978 | Stud Book | Not Eligible |
| OHIO JIN | Mare | CHESTNUT | 26571 | 01/08/1952 | Stud Book | Deceased |
| OHIO MAGPIE - HSH | Gelding | BLACK | 63190 | 01/04/1979 | Stud Book | Not Eligible |
| OHIO POLLY | Mare | CHESTNUT | 51561 | Stud Book | Not Eligible | |
| OHIO SERENE | Mare | CHESTNUT | 41106 | 30/09/1976 | Stud Book | Not Eligible |
| OHIO SHADOW | Mare | BAY | F18376 | 15/10/1978 | Foal Recorded | Not Eligible |
| OHIO SMILEY | Mare | BAY | F28539 | 06/09/1980 | Foal Recorded | Not Eligible |
| OHIO SOLIDARITY | Stallion | BROWN | F28538 | 18/10/1980 | Foal Recorded | Not Eligible |
| OHIO WARRIAGLE - HSH | Stallion | BROWN | 42351 | 01/12/1975 | Stud Book | Deceased |
| OK ELECTRO | Mare | BROWN | 4027 | Stud Book | Deceased | |
| OK PHALARUS | Mare | BAY | 11094 | Stud Book | Deceased | |
| OK SPUTNICK | Mare | BAY | 4026 | Stud Book | Deceased | |
| OKA BALI | Mare | CHESTNUT | 80178 | 08/08/1984 | Stud Book | Not Eligible |
| OKA BLONDIE | Mare | PALOMINO | 80177 | 01/08/1987 | Stud Book | Deceased |
| OKA BRIGLOW BID | Gelding | BROWN | 144875 | 16/11/1999 | Stud Book | Deceased |
| OKA CAMEO | Gelding | PALOMINO | 127959 | 30/09/1996 | Stud Book | Deceased |
| OKA CONJUR | Mare | BROWN/BLACK | 155202 | 23/02/2001 | Stud Book | Eligible |
| OKA COOLIBAH KATE - HSH | Mare | BROWN/BLACK | F133222 | 12/08/1997 | Foal Recorded | Not Eligible |
| OKA DOCS ABDUL | Gelding | CHESTNUT | 155204 | 25/12/2000 | Stud Book | Not Eligible |
| OKA FOX | Gelding | DUN | 155201 | 02/01/2000 | Stud Book | Deceased |
| OKA GAUCHO | Gelding | BROWN | 124791 | 20/11/1994 | Stud Book | Not Eligible |
| OKA GOLDEN CRUMPET | Mare | PALOMINO | 80175 | 16/10/1983 | Stud Book | Deceased |
| OKA GYDGEE | Mare | BAY | F127963 | 01/12/1995 | Foal Recorded | Deceased |
| OKA HOOK - HSH | Gelding | CHESTNUT | 124788 | 25/11/1994 | Stud Book | Not Eligible |
| OKA KINKARA | Mare | CHESTNUT | F135165 | 21/12/1997 | Foal Recorded | Deceased |
| OKA LARA | Mare | PALOMINO | 155203 | 17/12/2000 | Stud Book | Deceased |
| OKA LEILA - HSH | Mare | CHESTNUT | F127961 | 12/01/1997 | Foal Recorded | Not Eligible |
| OKA MARIAH | Mare | BAY | 80181 | 01/08/1983 | Stud Book | Eligible |
| OKA OAKS MANTILLA | Mare | CHESTNUT | 147879 | 28/08/1999 | Stud Book | Deceased |
| OKA PAGAN | Mare | BAY | F135167 | 22/02/1998 | Foal Recorded | Deceased |
| OKA SARI | Mare | GREY | 80179 | 10/01/1985 | Stud Book | Deceased |