Stemster (GB)
Stemster (GB) is 3 from 36. Hasn't won since Oct 2016. All 3 wins have come on turf — 0 from 13 on the all-weather. All 3 wins have come over 1m – 1m1f.
- 3–36Wins / Runs
- 8.3%Strike rate
- 8 (22.2%)Placed
- −9.70£1 level staken=36 at SP
- 1.13Fair A/E n=35 · 0.94 incl. margin
- 75dAvg 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
No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · 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 is derived from in-running commentary, which our data provider does not supply for this horse's races.
Pedigree intelligence
Progeny in our archive have won 11.9% of 20,818 runs since Jan 2008 (1,573 horses).
Strongest on firm going: 16.1% from 161. Weakest over 1m5f – 2m (all codes): 7.8% from 843.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 161 | 26 | 16.1% | +4.2 | — |
| Good to Firm | 3,581 | 463 | 12.9% | +1 | — |
| Good | 4,529 | 487 | 10.8% | −1.1 | 1 from 10 |
| Good to Soft | 2,132 | 254 | 11.9% | 0 | 1 from 8 |
| Soft | 2,758 | 303 | 11% | −0.9 | 0 from 2 |
| Heavy | 790 | 76 | 9.6% | −2.3 | 1 from 3 |
| Standard (AW) | 6,866 | 866 | 12.6% | +0.7 | 0 from 13 |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 3,049 | 399 | 13.1% | +1.2 | 0 from 1 |
| 6f – 7f | 9,829 | 1,178 | 12% | +0.1 | 0 from 10 |
| 1m – 1m1f | 4,502 | 542 | 12% | +0.1 | 3 from 20 |
| 1m2f – 1m4f | 2,139 | 249 | 11.6% | −0.3 | 0 from 5 |
| 1m5f – 2m | 843 | 66 | 7.8% | −4.1 | — |
| 2m1f – 2m4f | 360 | 33 | 9.2% | −2.7 | — |
| 2m5f – 3m | 89 | 8 | 9% | −2.9 | — |
| Over 3m | 7 | 1 | 14.3% | +2.4 | — |
Flat and jumps together (all codes) · since Jan 2008 · as at 21 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
2 siblings in the archive, 2 winners — best of them Grizzly James (FR) (1 win).
The wins came over 2m1½f–2m5f; the highest grade won is Class 5 (Grizzly James (FR)).
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Grizzly James (FR) | 17 | 1 | 2m5f | Class 5 |
| Father James (FR) | 4 | 1 | 2m1½f | — |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Standard (AW) | 13 | 0 | 0% | −13.00 |
| Good | 10 | 1 | 10% | −2.40 |
| Good to Soft | 8 | 1 | 13% | +3.50 |
| Heavy | 3 | 1 | 33% | +4.20 |
| Soft | 2 | 0 | 0% | −2.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Chantilly (FR) | 11 | 0 | 0% | −11.00 |
| Deauville (FR) | 10 | 1 | 10% | −2.40 |
| Maisons-Laffitte (FR) | 6 | 1 | 17% | +1.20 |
| Longchamp (FR) | 4 | 0 | 0% | −4.00 |
| Saint-Cloud (FR) | 2 | 1 | 50% | +9.50 |
| Le Croise-Laroche (FR) | 1 | 0 | 0% | −1.00 |
| Clairefontaine (FR) | 1 | 0 | 0% | −1.00 |
| Tarbes | 1 | 0 | 0% | −1.00 |
| Distance | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 1m – 1m1f | 20 | 3 | 15% | +6.30 |
| 6f – 7f | 10 | 0 | 0% | −10.00 |
| 1m2f – 1m4f | 5 | 0 | 0% | −5.00 |
| Under 6f | 1 | 0 | 0% | −1.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Tony Piccone | 6 | 0 | 0% | −6.00 |
| Anthony Crastus | 5 | 2 | 40% | +9.80 |
| Mme Lea Bails | 3 | 0 | 0% | −3.00 |
| Mlle Pauline Dominois | 3 | 0 | 0% | −3.00 |
| Mme Perrine Cheyer | 2 | 0 | 0% | −2.00 |
| Delphine Santiago | 2 | 0 | 0% | −2.00 |
| Maxime Guyon | 2 | 0 | 0% | −2.00 |
| Christophe Soumillon | 2 | 0 | 0% | −2.00 |
| Mme Alison Massin | 1 | 0 | 0% | −1.00 |
| Benjamin Marie | 1 | 0 | 0% | −1.00 |
| Alberto Berton | 1 | 0 | 0% | −1.00 |
| Gearoid Brouder | 1 | 0 | 0% | −1.00 |
| Mme Anna Van Den Troost | 1 | 0 | 0% | −1.00 |
| David Breux | 1 | 1 | 100% | +10.50 |
| Jente Marien | 1 | 0 | 0% | −1.00 |
| Eddy Hardouin | 1 | 0 | 0% | −1.00 |
| Sirhan Bigot | 1 | 0 | 0% | −1.00 |
| Cristian Demuro | 1 | 0 | 0% | −1.00 |
| David Michaux | 1 | 0 | 0% | −1.00 |
| Headgear | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| None | 31 | 3 | 10% | −4.70 |
| Cheekpieces | 4 | 0 | 0% | −4.00 |
| Blinkers | 1 | 0 | 0% | −1.00 |
| Season | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 2021 | 1 | 0 | 0% | −1.00 |
| 2020 | 6 | 0 | 0% | −6.00 |
| 2019 | 8 | 0 | 0% | −8.00 |
| 2018 | 5 | 0 | 0% | −5.00 |
| 2017 | 1 | 0 | 0% | −1.00 |
| 2016 | 2 | 2 | 100% | +17.10 |
| 2015 | 9 | 1 | 11% | −1.80 |
| 2014 | 4 | 0 | 0% | −4.00 |
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
Quick answers
- How many races has Stemster (GB) won?
- Stemster (GB) won 3 of 36 archived starts between 2014 and 2021, a strike rate of 8.3%. Placed 8 times in total (22.2% of starts).
- Who trained Stemster (GB)?
- Stemster (GB) was trained by Rosine Bouckhuyt on the most recent run on record, at Longchamp (FR) on 8 July 2021.
- Who is Stemster (GB)'s sire?
- Stemster (GB) is by Invincible Spirit (IRE) out of Mariyara (FR), whose sire is Daylami.
- What going does Stemster (GB) prefer?
- Stemster (GB) has the best record on heavy going: 1 win from 3 starts (33.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
- What is Stemster (GB)'s sire's record?
- Invincible Spirit (IRE)'s progeny in our archive have won 11.9% of 20,818 runs since Jan 2008 (1,573 horses), Flat and jumps together. Strongest on firm going: 16.1% from 161. Weakest over 1m5f – 2m (all codes): 7.8% from 843.
- Who are Stemster (GB)'s siblings?
- Out of Mariyara (FR), Stemster (GB) has 2 other produce in our archive, 2 of them winners. Most wins: Grizzly James (FR) (1). Highest grade won: Class 5 (Grizzly James (FR)). The wins came over 2m1½f–2m5f. As at Oct 2026.