Supreme Diamond (IRE)
Supreme Diamond won one of five starts on turf, the success coming in a Class 5 maiden at Bath over under 6f on heavy ground in Sep 2025. The filly, by Supremacy out of a Siyouni mare, was second of four when she led in a Class 5 nursery at Ffos Las later that month. She raced off her career-high mark of 71 at Ffos Las. Aged 2 at her last run in Sep 2025.
- 1–5Wins / Runs
- 20%Strike rate
- 2 (40%)Placed
- −1.50£1 level staken=5 at SP
- 1.28Fair A/E n=5 · 1.12 incl. margin
- 71Highest OR
- 36dAvg between runs
A/E compares actual wins with what starting prices implied. "Fair" strips the bookmaker margin from the expectation, so favourites and longshots are judged on the same footing — figures near 1.00 mean the market priced this horse about right.
KTB Speed and Rating
Best recent Speed 83
How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →
| Going | Runs | Best | Median | Since 25 Oct 2025 |
|---|---|---|---|---|
| Heavy | 2 | 88C | 85.5 | — |
| Good to Firm | 2 | 77A | 76 | — |
| Good | 1 | — | — | — |
| Distance | Runs | Best | Median | Since 25 Oct 2025 |
|---|---|---|---|---|
| Under 6f | 3 | 88C | 83 | — |
| 6f – 7f | 2 | 77A | 67 | — |
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 5 figures from 5 runs · as at 3 Oct 2026 · a record, not a forecast
Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.
Run style from 5 analysed runs since May 2025
- Prominent 3 (60%) · 1 win
- Led 2 (40%) · 0 wins
Pedigree intelligence
Progeny in our archive have won 8.4% of 558 runs since Jan 2008 (93 horses).
Weakest on standard (aw) going: 4.7% from 149.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 2 | 0 | 0% | −8.4 | — |
| Good to Firm | 114 | 10 | 8.8% | +0.4 | 0 from 2 |
| Good | 163 | 16 | 9.8% | +1.4 | 0 from 1 |
| Good to Soft | 45 | 4 | 8.9% | +0.5 | — |
| Soft | 71 | 9 | 12.7% | +4.3 | — |
| Heavy | 14 | 1 | 7.1% | −1.3 | 1 from 2 |
| Standard (AW) | 149 | 7 | 4.7% | −3.7 | — |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 99 | 16 | 16.2% | +7.8 | 1 from 3 |
| 6f – 7f | 324 | 19 | 5.9% | −2.5 | 0 from 2 |
| 1m – 1m1f | 104 | 6 | 5.8% | −2.6 | — |
| 1m2f – 1m4f | 22 | 4 | 18.2% | +9.8 | — |
| 1m5f – 2m | 7 | 1 | 14.3% | +5.9 | — |
| 2m1f – 2m4f | 2 | 1 | 50% | +41.6 | — |
Flat and jumps together (all codes) · since Jan 2008 · as at 24 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
3 siblings in the archive, 1 winner — best of them Sayidah Dariyan (IRE) (3 wins).
The wins came over 6f; the highest grade won is Group 3 (Sayidah Dariyan (IRE)).
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Sayidah Dariyan (IRE) | 13 | 3 | 6f | Group 3 |
| Rubyroo (IRE) | 3 | 0 | — | — |
| Hard Rock (FR) | 1 | 0 | — | — |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Heavy | 2 | 1 | 50% | +1.50 |
| Good to Firm | 2 | 0 | 0% | −2.00 |
| Good | 1 | 0 | 0% | −1.00 |
| Class | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Class 5 | 2 | 1 | 50% | +1.50 |
| Class 4 | 2 | 0 | 0% | −2.00 |
| Class 2 | 1 | 0 | 0% | −1.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Ffos Las | 1 | 0 | 0% | −1.00 |
| Bath | 1 | 1 | 100% | +2.50 |
| Salisbury | 1 | 0 | 0% | −1.00 |
| Goodwood | 1 | 0 | 0% | −1.00 |
| Ascot | 1 | 0 | 0% | −1.00 |
| Distance | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Under 6f | 3 | 1 | 33% | +0.50 |
| 6f – 7f | 2 | 0 | 0% | −2.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Joe Leavy | 2 | 1 | 50% | +1.50 |
| David Probert | 2 | 0 | 0% | −2.00 |
| Rossa Ryan | 1 | 0 | 0% | −1.00 |
Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.
Form
| Date | Course | Race | Pos | Btn | Wgt | OR | Spd | KTB | Jockey | SP |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025 · 5 runs | ||||||||||
| 28 Sep 25+14d | Ffos Las | Congratulations To Felinfoel RFC Nursery Set the pace early - urged on with two furlongs left before losing top spot inside the final furlong - unable to find more close home | 2/4 | 4¼ | 9-9 | 71 | 88C | 72B | Joe Leavy | 11/4 |
| 14 Sep 25+96d | Bath | Blackmore Building Contractors Restricted Maiden Fillies' Stakes (GBB Race) Sat close to pace early - went ahead approaching 2f out then edged left under pressure inside the last furlong - responded strongly to hold rivals - held on grimly for the win | 1/8 | 9-2 | 68 | 83A | 76A | Joe Leavy | 5/2F | |
| 10 Jun 25+17d | Salisbury | Clive Cox Racing British EBF Restricted Novice Stakes (GBB Race) (Div 1) Sat close to pace until inside final 2f - pressed for effort inside final furlong but found nothing more - held for third | 3/12 | 3 | 8-13 | — | 77A | 69A | David Probert | 14/1 |
| 24 May 25+15d | Goodwood | James Reid 60th Birthday EBF Maiden Fillies' Stakes (GBB Race) Set the early pace - roused approaching the furlong marker as the advantage slipped away - squeezed for space close home and found nothing more - finished fifth beaten just over 2 lengths | 5/6 | ½ | 9-2 | — | 57A | 65B | David Probert | 11/2 |
| 09 May 25 | Ascot | Juddmonte British EBF Restricted Maiden Fillies' Stakes (GBB Race) Sat close to the pace early - dropped away inside final 2f - well held at the finish | 9/13 | 1¾ | 9-2 | — | 75C | 48A | Rossa Ryan | 15/2 |
Quick answers
- How many races has Supreme Diamond won?
- Supreme Diamond (IRE) won 1 of 5 archived starts in 2025, a strike rate of 20%. Placed 2 times in total (40% of starts).
- Who trained Supreme Diamond?
- Supreme Diamond (IRE) was trained by Clive Cox on the most recent run on record, at Ffos Las on 28 September 2025.
- Who is Supreme Diamond's sire?
- Supreme Diamond (IRE) is by Supremacy (IRE) out of Tencaratrubieslace (FR), whose sire is Siyouni.
- What is Supreme Diamond's official rating?
- The most recent official rating on record is 71, from the run on 28 September 2025. That is also the highest on record.
- What is Supreme Diamond's sire's record?
- Supremacy (IRE)'s progeny in our archive have won 8.4% of 558 runs since Jan 2008 (93 horses), Flat and jumps together. Weakest on standard (aw) going: 4.7% from 149.
- Who are Supreme Diamond's siblings?
- Out of Tencaratrubieslace (FR), Supreme Diamond (IRE) has 3 other produce in our archive, 1 of them a winner. Most wins: Sayidah Dariyan (IRE) (3). Highest grade won: Group 3 (Sayidah Dariyan (IRE)). The wins came over 6f. As at Oct 2026.