Zambezi Shark (GB)
Zambezi Shark is a colt by Aclaim out of River Song. He has failed to win or place in four starts between Jun 2026 and Oct 2026, all over 6f – 7f. He has raced on good to firm, good to soft, soft and standard going, and has contested one nursery. His last run, at Newmarket in Oct 2026, saw him finish 11 of 13 in a Class 4 nursery off an official rating of 65.
- 0–4Wins / Runs
- 0%Strike rate
- 0 (0%)Placed
- −4.00£1 level staken=4 at SP
- 65Highest OR
- 27dBetween runs (median)longest 86 d
KTB Speed and Rating
Best recent Speed 62
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 4 Nov 2025 |
|---|---|---|---|---|
| Soft | 1 | — | — | 1 run · — |
| Standard (AW) | 1 | — | — | 1 run · — |
| Good to Firm | 1 | — | — | 1 run · — |
| Good to Soft | 1 | — | — | 1 run · — |
| Distance | Runs | Best | Median | Since 4 Nov 2025 |
|---|---|---|---|---|
| 6f – 7f | 4 | 75C | 63.5 | 4 runs · 75 / 63.5 |
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 4 figures from 4 runs · as at 29 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 4 analysed runs since Jun 2026
- Prominent 2 (50%) · 0 wins
- Held up 2 (50%) · 0 wins
Pedigree intelligence
Progeny in our archive have won 9.9% of 2,550 runs since Mar 2021 (201 horses).
Weakest over 1m – 1m1f (all codes): 6.7% from 390.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 10 | 1 | 10% | +0.1 | — |
| Good to Firm | 410 | 43 | 10.5% | +0.6 | 0 from 1 |
| Good | 547 | 49 | 9% | −0.9 | — |
| Good to Soft | 216 | 25 | 11.6% | +1.7 | 0 from 1 |
| Soft | 256 | 29 | 11.3% | +1.4 | 0 from 1 |
| Heavy | 74 | 6 | 8.1% | −1.8 | — |
| Standard (AW) | 1,037 | 100 | 9.6% | −0.3 | 0 from 1 |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 482 | 51 | 10.6% | +0.7 | — |
| 6f – 7f | 1,508 | 161 | 10.7% | +0.8 | 0 from 4 |
| 1m – 1m1f | 390 | 26 | 6.7% | −3.2 | — |
| 1m2f – 1m4f | 128 | 11 | 8.6% | −1.3 | — |
| 1m5f – 2m | 22 | 2 | 9.1% | −0.8 | — |
| 2m1f – 2m4f | 17 | 2 | 11.8% | +1.9 | — |
| 2m5f – 3m | 3 | 0 | 0% | −9.9 | — |
Flat and jumps together (all codes) · since Mar 2021 · as at 3 Nov 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
8 siblings in the archive, 5 winners — best of them Queen Jo Jo (GB) (3 wins).
The wins came over 5f–1m; the highest grade won is Group 3 (Queen Jo Jo (GB)).
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Queen Jo Jo (GB) | 14 | 3 | 5f–6f | Group 3 |
| Mr Minerals (GB) | 30 | 2 | 7f–1m | Class 4 |
| Only Dream Big (GB) | 17 | 2 | 7f–1m | Class 6 |
| Ormskirk (GB) | 42 | 1 | 6f | Class 5 |
| Insomnia (GB) | 9 | 1 | 7f | Class 5 |
| Reflection (GB) | 15 | 0 | — | — |
| Riviera Song (GB) | 2 | 0 | — | — |
| Romany Gypsy (GB) | 3 | 0 | — | — |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Soft | 1 | 0 | 0% | −1.00 |
| Standard (AW) | 1 | 0 | 0% | −1.00 |
| Good to Firm | 1 | 0 | 0% | −1.00 |
| Good to Soft | 1 | 0 | 0% | −1.00 |
| Class | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Class 2 | 3 | 0 | 0% | −3.00 |
| Class 4 | 1 | 0 | 0% | −1.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Newmarket | 1 | 0 | 0% | −1.00 |
| Southwell (AW) | 1 | 0 | 0% | −1.00 |
| Newbury | 1 | 0 | 0% | −1.00 |
| Chester | 1 | 0 | 0% | −1.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Kieran O'Neill | 1 | 0 | 0% | −1.00 |
| Pat Cosgrave | 1 | 0 | 0% | −1.00 |
| Ross Coakley | 1 | 0 | 0% | −1.00 |
| Cieren Fallon | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · 4 runs | ||||||||||
| 21 Oct 26+86d | Newmarket | Copybet Overnight Best Odds Guaranteed Nursery Handicap Stakes Against the far rail - up with the pace - pushed along over 3f out - drifted left over 2f out - faded inside final furlong | 11/13 | ½ | 8-3 | 65 | 65C | 57A | Kieran O'Neill | 66/1 |
| 27 Jul 26+18d | Southwell (AW) | Prestige Safety Your Competent H&S Service Ebf Restricted Novice Stakes (for Horses In Bands B, C And D) (Ebf Restricted Race Qualifier) (GBB Race) slow into stride - settled at the back - not a threat at any stage | 8/12 | 2¼ | 9-4 | — | 38A | 42A | Pat Cosgrave | 50/1 |
| 09 Jul 26+27d | Newbury | Juddmonte EBF Restricted Novice Stakes (GBB Race) Tracked the pace - dropped away 2f out - no longer competitive by 1f out | 12/18 | ¾ | 9-7 | — | 75C | 67A | Ross Coakley | 40/1 |
| 12 Jun 26 | Chester | Juddmonte EBF Restricted Novice Stakes (GBB Race) Settled at the back early - crept into contention two out - pushed along soon after - kept on late but never got close enough to finish 5th | 5/9 | shd | 9-4 | — | 62A | 76A | Cieren Fallon | 14/1 |
Quick answers
- How many races has Zambezi Shark won?
- Zambezi Shark (GB) has yet to win, from 4 archived starts in 2026.
- Who trains Zambezi Shark?
- Zambezi Shark (GB) is trained by Stuart Williams, who saddled the horse on its most recent run on 21 October 2026.
- Who is Zambezi Shark's sire?
- Zambezi Shark (GB) is by Aclaim (IRE) out of River Song (USA), whose sire is Siphon.
- What is Zambezi Shark's official rating?
- The most recent official rating on record is 65, from the run on 21 October 2026. That is also the highest on record.
- What is Zambezi Shark's sire's record?
- Aclaim (IRE)'s progeny in our archive have won 9.9% of 2,550 runs since Mar 2021 (201 horses), Flat and jumps together. Weakest over 1m – 1m1f (all codes): 6.7% from 390.
- Who are Zambezi Shark's siblings?
- Out of River Song (USA), Zambezi Shark (GB) has 8 other produce in our archive, 5 of them winners. Most wins: Queen Jo Jo (GB) (3). Highest grade won: Group 3 (Queen Jo Jo (GB)). The wins came over 5f–1m. As at Nov 2026.