| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| SIR WILLIAM | Stallion | CHESTNUT | 2211 | 01/11/1970 | Stud Book | Deceased |
| SIR WIZARD OF OZ | Gelding | BAY/PIED | 73294 | 21/04/1981 | Stud Book | Not Eligible |
| SIR WONGA CHIEF | Stallion | BLACK | 77689 | 08/08/1984 | Stud Book | Not Eligible |
| SIRCAC | Gelding | BROWN | 27974 | Stud Book | Not Eligible | |
| SIRENS ROCK | Gelding | GREY | 67913 | 01/08/1977 | Stud Book | Not Eligible |
| SIRICCA | Mare | BAY | 34483 | 17/09/1972 | Stud Book | Not Eligible |
| SIRIKIT | Mare | BROWN | 2019 | 01/08/1961 | Stud Book | Deceased |
| SIRIQUE CHIQUITA | Mare | BAY | 40668 | Stud Book | Not Eligible | |
| SIRIQUE GYPSY | Mare | BLACK | 36022 | 15/10/1969 | Stud Book | Deceased |
| SIRIQUI GREY DOVE | Mare | GREY | 17048 | 01/01/1968 | Stud Book | Deceased |
| SIRIUS | Mare | CHESTNUT | F39047 | 20/12/1984 | Foal Recorded | Deceased |
| SIRIUS BERMUDA - HSH | Mare | BROWN | 183113 | 24/12/2005 | Stud Book | Not Eligible |
| SIRIUS BHUTAN - HSH | Mare | BROWN/BLACK | 186184 | 01/11/2007 | Stud Book | Not Eligible |
| SIRIUS BURMA - HSH | Mare | CHESTNUT | SM-181312 | 01/10/1995 | Special Merit - Stud Book | Not Eligible |
| SIRIUS MELBOURNE | Gelding | BLACK | 186182 | 23/10/2007 | Stud Book | Not Eligible |
| SIRIUS MEMOIR | Mare | BROWN | 181231 | 01/10/1999 | Stud Book | Not Eligible |
| SIRIUS SWANSONG | Mare | BROWN/BLACK | 181232 | 01/01/2001 | Stud Book | Not Eligible |
| SIRLETTE - HSH | Stallion | BROWN | 106363 | 04/12/1985 | Stud Book | Not Eligible |
| SIROCAN PALM | Gelding | GREY | 25951 | 15/09/1973 | Stud Book | Not Eligible |
| SIROCCO | Stallion | BAY | F38792 | 26/12/1984 | Foal Recorded | Not Eligible |
| SIROCCO I | Mare | CHESTNUT | 10254 | Stud Book | Deceased | |
| SIROCCO MAC - HSH | Gelding | BROWN/BLACK | 133017 | 02/11/1995 | Stud Book | Not Eligible |
| SIROCCO TOPAZ | Gelding | CHESTNUT | 25955 | Stud Book | Deceased | |
| SIROD QUEEN | Mare | CHESTNUT | 55811 | Stud Book | Not Eligible | |
| SIRRAH BLOSSOM - HSH | Mare | BROWN | 243209 | 29/10/2013 | Stud Book | Eligible |
| SIRRAH CARBON COPY - HSH | Mare | BAY | 267881 | 07/08/2023 | Stud Book | Eligible |
| SIRRAH CHATTAHOOCHEE | Gelding | BROWN/BLACK | C1-257830 | 24/09/2015 | First Cross | Not Eligible |
| SIRRAH CHICKADEE - HSH | Mare | BROWN | 243210 | 30/10/2015 | Stud Book | Eligible |
| SIRRAH CLASSIC BERT | Gelding | CHESTNUT | 259856 | 21/09/2021 | Stud Book | Not Eligible |
| SIRRAH CLASSIC POPPY | Mare | BROWN | 259167 | 11/11/2020 | Stud Book | Eligible |
| SIRRAH DOVE - HSH | Mare | BAY/BROWN | 267880 | 18/11/2023 | Stud Book | Eligible |
| SIRRAH ELVIRA - HSH | Mare | BLACK/GREY | 267879 | 14/11/2023 | Stud Book | Eligible |
| SIRRAH FONZ | Gelding | BROWN | C1-257831 | 07/09/2018 | First Cross | Not Eligible |
| SIRRAH FOREMAN - HSH | Gelding | CHESTNUT | 263121 | 18/11/2022 | Stud Book | Eligible |
| SIRRAH GENERAL - HSH | Gelding | BAY | C2-259857 | 03/08/2020 | Second Cross | Not Eligible |
| SIRRAH GENIE - HSH | Mare | BAY | 251381 | 03/01/2018 | Stud Book | Eligible |
| SIRRAH JINX | Gelding | BLACK | 267882 | 07/12/2023 | Stud Book | Eligible |
| SIRRAH LOVEBIRD - HSH | Mare | BROWN | 269102 | 13/11/2024 | Stud Book | Eligible |
| SIRRAH MAESTRO - HSH | Stallion | BLACK/GREY | 269100 | 19/09/2024 | Stud Book | Eligible |
| SIRRAH RADAR | Gelding | BAY | 254639 | 07/12/2019 | Stud Book | Eligible |
| SIRRAH RELIC | Mare | CHESTNUT | C1-267878 | 31/10/2023 | First Cross | Eligible |
| SIRRAH ROSELLA - HSH | Mare | BROWN | 260787 | 02/12/2021 | Stud Book | Eligible |
| SIRRAH ROYAL MINT - HSH | Stallion | BROWN/BLACK | 269101 | 17/12/2024 | Stud Book | Eligible |
| SIRRAH STORM TROOPER | Gelding | BAY | C2-269103 | 25/10/2024 | Second Cross | Eligible |
| SIRRANIC | Gelding | BAY | 9127 | 01/08/1970 | Stud Book | Deceased |
| SIRREF LADY MANERVA | Mare | CHESTNUT | F21843 | 16/02/1980 | Foal Recorded | Not Eligible |
| SIRREF LADYBIRD | Mare | BAY | 30339 | 22/05/1970 | Stud Book | Deceased |
| SIRROCO | Gelding | BAY | 65342 | 12/10/1968 | Stud Book | Deceased |
| SIRROM | Mare | BROWN | 40009 | Stud Book | Not Eligible | |
| SIRRONVALE AUSSIE SOLDIER | Gelding | BAY | C1-188209 | 05/01/2005 | First Cross | Eligible |
| SIRRONVALE BERT | Gelding | CHESTNUT | C1-178203 | 06/11/2002 | First Cross | Not Eligible |
| SIRRONVALE CLOUD - HSH | Gelding | CHESTNUT/TAFFY | 182378 | 16/10/2005 | Stud Book | Not Eligible |
| SIRRONVALE HILARY | Mare | BAY | C1-232987 | 20/11/2009 | First Cross | Eligible |
| SIRRONVALE JAG - HSH | Stallion | DUN | 192265 | 18/12/2009 | Stud Book | Not Eligible |
| SIRRONVALE SWIPER - HSH | Gelding | BLACK | 232968 | 21/01/2009 | Stud Book | Deceased |
| SIRSI LIL ASSASSIN | Mare | BLACK | 269512 | 29/12/2023 | Stud Book | Not Eligible |
| SISALANA ARROW | Gelding | BAY/PIED | 61023 | 01/09/1976 | Stud Book | Deceased |
| SISALANA BO L E BARS | Mare | BLACK/PIED | 68457 | 16/11/1980 | Stud Book | Deceased |
| SISALANA CHARMANE | Mare | CHESTNUT/PIED | 61128 | 01/01/1973 | Stud Book | Not Eligible |
| SISALANA CINDY | Mare | GREY | 61025 | 01/01/1968 | Stud Book | Deceased |
| SISALANA COPPER PRINCESS | Mare | CHESTNUT/PIED | 62663 | 12/03/1971 | Stud Book | Deceased |
| SISALANA DESERT ROSE | Mare | BAY | 61129 | 01/01/1969 | Stud Book | Deceased |
| SISALANA DUSTY ROCHELLE | Mare | BROWN | 62664 | 06/10/1975 | Stud Book | Not Eligible |
| SISALANA ECHO | Gelding | BAY/PIED | 61024 | 01/05/1975 | Stud Book | Deceased |
| SISALANA MANCHO MAN | Gelding | CHESTNUT/PIED | 65168 | 04/09/1979 | Stud Book | Not Eligible |
| SISALANA MIGHTY MISSY | Mare | CHESTNUT | 68204 | 16/12/1977 | Stud Book | Not Eligible |
| SISALANA MILLIE | Mare | CHESTNUT/PIED | 67045 | 01/08/1969 | Stud Book | Deceased |
| SISALANA NO SECRET | Mare | BROWN | 68205 | 12/02/1982 | Stud Book | Not Eligible |
| SISALANA SHIELA | Mare | BLACK | 61021 | 01/07/1968 | Stud Book | Deceased |
| SISALANA SLEEPY RODEO GIRL | Mare | CHESTNUT | 68206 | 19/02/1982 | Stud Book | Deceased |
| SISALANA SLEEPYS ANITA | Mare | BROWN | 61022 | 22/01/1978 | Stud Book | Deceased |
| SISALANA SNOWFLAKE | Mare | CHESTNUT | 61026 | 26/11/1978 | Stud Book | Deceased |
| SISKA | Mare | GREY | 13464 | 01/01/1966 | Stud Book | Deceased |
| SISKAS LASS | Mare | CHESTNUT | 21940 | 18/09/1970 | Stud Book | Deceased |
| SISS DAINTY | Mare | GREY | 77097 | 20/11/1984 | Stud Book | Not Eligible |
| SISSAN | Mare | CHESTNUT | 25065 | Stud Book | Not Eligible | |
| SISSONS BRANDY | Mare | CHESTNUT | 26201 | Stud Book | Not Eligible | |
| SISSY | Mare | CHESTNUT | 1300 | Stud Book | Deceased | |
| SISSY GIRL | Mare | BAY | 21365 | 05/09/1968 | Stud Book | Deceased |
| SISTER | Mare | CHESTNUT | 268 | 01/08/1962 | Stud Book | Deceased |
| SISTER AGATHA | Mare | BAY | BP-183104 | 12/10/1999 | Breeding Purposes Only - Stud Book | Not Eligible |
| SISTER BELLE | Mare | GREY | 32164 | 01/12/1972 | Stud Book | Not Eligible |
| SISTER BINE | Mare | BAY | 30335 | 01/08/1970 | Stud Book | Deceased |
| SISTER CAROL | Mare | CHESTNUT | 2203 | Stud Book | Deceased | |
| SISTER CINDY | Mare | BAY | 27269 | Stud Book | Not Eligible | |
| SISTER GERRARD | Mare | BLACK | 19507 | Stud Book | Deceased | |
| SISTER JANE | Mare | BROWN | 22540 | 18/09/1972 | Stud Book | Not Eligible |
| SISTER LEE | Mare | CHESTNUT | 38510 | 20/09/1971 | Stud Book | Deceased |
| SISTER LULU | Mare | BROWN | 3445 | Stud Book | Deceased | |
| SISTER MEG - HSH | Mare | BAY | 45023 | 01/11/1972 | Stud Book | Deceased |
| SISTER MONTY - FM HSH | Mare | BLACK | 3542 | 01/08/1956 | Stud Book | Deceased |
| SISTER ROBYN | Mare | CHESTNUT | 77655 | 13/10/1986 | Stud Book | Deceased |
| SISTER RUSH | Mare | BROWN | 41276 | 01/01/1971 | Stud Book | Deceased |
| SISTER SUE | Mare | GREY | 4791 | Stud Book | Deceased | |
| SISTER TEMBU | Mare | BAY | 19572 | Stud Book | Deceased | |
| SISTER TILQUIN | Mare | GREY/WHITE | 57083 | 02/06/1973 | Stud Book | Deceased |
| SISTERS DREAM | Mare | BROWN | 214127 | 25/01/1983 | Stud Book | Not Eligible |
| SISTERSHIP | Mare | PALOMINO | 37024 | Stud Book | Not Eligible | |
| SIT DOWN | Gelding | GREY | 75104 | 01/01/1981 | Stud Book | Not Eligible |
| SITRA LANDING | Mare | BAY | F28346 | 07/08/1980 | Foal Recorded | Not Eligible |