Mergus Serrator (IRE)
Mergus Serrator is a gelding by Masar out of an Almareekh mare who has failed to win in six starts on turf. He showed his best effort when fourth of nine at Killarney in May 2026. The horse has raced twice over 1m5f to 2m, twice over 1m2f to 1m4f and twice over 1m to 1m1f, mostly on soft ground. He finished sixth of eight in a handicap at Listowel in Sep 2026 off an official rating of 83.
- 0–6Wins / Runs
- 0%Strike rate
- 0 (0%)Placed
- −6.00£1 level staken=6 at SP
- 0.00Fair A/E n=6 · 0.00 incl. margin
- 84Highest OR
- 39dBetween runs (median)longest 189 d
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 112
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 5 Nov 2025 |
|---|---|---|---|---|
| Soft | 3 | 112A | 87 | 2 runs · 112 / 94.5 |
| Good | 1 | — | — | 1 run · — |
| Good to Soft | 1 | — | — | 1 run · — |
| Distance | Runs | Best | Median | Since 5 Nov 2025 |
|---|---|---|---|---|
| 1m5f – 2m | 2 | 112A | 94.5 | 2 runs · 112 / 94.5 |
| 1m – 1m1f | 2 | 93A | 90 | 1 run · — |
| 1m2f – 1m4f | 1 | — | — | 1 run · — |
Of 6 runs looked at, 1 has no figure: not enough races on the card to set the day (under 4) (1).
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 5 figures from 6 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 6 analysed runs since Oct 2025
- Prominent 3 (50%) · 0 wins
- Mid-division 2 (33%) · 0 wins
- Held up 1 (17%) · 0 wins
Pedigree intelligence
Progeny in our archive have won 11.7% of 1,240 runs since Apr 2023 (177 horses).
Strongest on good to firm going: 15.6% from 167. Weakest on good to soft going: 8.2% from 134. Strongest over 1m5f – 2m (all codes): 14.7% from 170. Weakest over 6f – 7f (all codes): 8.1% from 223.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 2 | 0 | 0% | −11.7 | — |
| Good to Firm | 167 | 26 | 15.6% | +3.9 | — |
| Good | 308 | 35 | 11.4% | −0.3 | 0 from 1 |
| Good to Soft | 134 | 11 | 8.2% | −3.5 | 0 from 1 |
| Soft | 150 | 17 | 11.3% | −0.4 | 0 from 4 |
| Heavy | 39 | 2 | 5.1% | −6.6 | — |
| Standard (AW) | 440 | 54 | 12.3% | +0.6 | — |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 9 | 1 | 11.1% | −0.6 | — |
| 6f – 7f | 223 | 18 | 8.1% | −3.6 | — |
| 1m – 1m1f | 319 | 32 | 10% | −1.7 | 0 from 2 |
| 1m2f – 1m4f | 447 | 65 | 14.5% | +2.8 | 0 from 2 |
| 1m5f – 2m | 170 | 25 | 14.7% | +3 | 0 from 2 |
| 2m1f – 2m4f | 60 | 2 | 3.3% | −8.4 | — |
| 2m5f – 3m | 12 | 2 | 16.7% | +5 | — |
Flat and jumps together (all codes) · since Apr 2023 · as at 4 Nov 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
1 sibling in the archive, 1 winner — best of them Ayuq (IRE) (1 win).
The wins came over 1m; the highest grade won is Class 3 (Ayuq (IRE)).
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Ayuq (IRE) | 2 | 1 | 1m | Class 3 |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Soft | 4 | 0 | 0% | −4.00 |
| Good | 1 | 0 | 0% | −1.00 |
| Good to Soft | 1 | 0 | 0% | −1.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Listowel (IRE) | 1 | 0 | 0% | −1.00 |
| Galway (IRE) | 1 | 0 | 0% | −1.00 |
| Down Royal | 1 | 0 | 0% | −1.00 |
| Killarney | 1 | 0 | 0% | −1.00 |
| Navan | 1 | 0 | 0% | −1.00 |
| Leopardstown | 1 | 0 | 0% | −1.00 |
| Distance | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 1m5f – 2m | 2 | 0 | 0% | −2.00 |
| 1m2f – 1m4f | 2 | 0 | 0% | −2.00 |
| 1m – 1m1f | 2 | 0 | 0% | −2.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Gary Carroll | 3 | 0 | 0% | −3.00 |
| G. F. Carroll | 1 | 0 | 0% | −1.00 |
| Mr D G Lavery | 1 | 0 | 0% | −1.00 |
| Robert Whearty | 1 | 0 | 0% | −1.00 |
| Season | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 2026 | 5 | 0 | 0% | −5.00 |
| 2025 | 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 · 5 runs | ||||||||||
| 22 Sep 26+55d | Listowel (IRE) | Jet, Peggy & Eamonn O'Carroll Memorial Handicap Tracked the front early - second at halfway then third turning in - lacked response and dropped away inside the final furlong | 6/8 | 10 | 9-10 | 83 | 77A | 65A | G. F. Carroll | 11/1 |
| 29 Jul 26+39d | Galway (IRE) | Visit Tote26 On Course Today (Q.R.) Maiden Settled in the pack - urged forward with 2f to run and 7th turning in - unable to find more late | 5/18 | 9½ | 11-1 | 84 | — | 63C | Mr D G Lavery | 5/1 |
| 20 Jun 26+39d | Down Royal | BOYLE Sports Ulster Derby (Premier Handicap) Held up early - improved on outer approaching 3f out - pressed for 6th spot 2f out - up to 3rd for a moment before unable to find more and finished 5th | 5/9 | ¾ | 8-10 | 84 | 112A | 78A | Gary Carroll | 7/2J |
| 12 May 26+17d | Killarney | Irish Stallion Farms EBF (C & G) Maiden Sat close to pace early - drifted to midfield after 2f and 6th at halfway - pressed for effort 2f out without gaining ground - stayed on to finish fourth | 4/9 | hd | 9-8 | — | 93A | 80A | Gary Carroll | 7/1 |
| 25 Apr 26+189d | Navan | Irish Stallion Farms EBF Median Auction Maiden (Smullen Series) Settled in the pack early - 7th at halfway - urged forward 3f out but made no headway - up to 5th inside final furlong - stayed on same gear to finish 4th | 4/18 | ½ | 9-8 | — | 120C | 85A | Gary Carroll | 8/1 |
| 2025 · 1 run | ||||||||||
| 18 Oct 25 | Leopardstown | Irish EBF (C & G) Maiden (Smullen Series) Sat close to front group early - 5th at halfway then pressed without gaining ground 1 1/2f out - stayed on same stride to finish sixth | 6/11 | 1 | 9-5 | — | 87A | 85A | Robert Whearty | 50/1 |
Quick answers
- How many races has Mergus Serrator won?
- Mergus Serrator (IRE) has yet to win, from 6 archived starts between 2025 and 2026.
- Who trains Mergus Serrator?
- Mergus Serrator (IRE) is trained by Gavin Cromwell, who saddled the horse on its most recent run on 22 September 2026.
- Who is Mergus Serrator's sire?
- Mergus Serrator (IRE) is by Masar (IRE) out of Almareekh (USA), whose sire is War Front.
- What is Mergus Serrator's official rating?
- The most recent official rating on record is 83, from the run on 22 September 2026. The highest on record is 84.
- What is Mergus Serrator's sire's record?
- Masar (IRE)'s progeny in our archive have won 11.7% of 1,240 runs since Apr 2023 (177 horses), Flat and jumps together. Strongest on good to firm going: 15.6% from 167. Weakest on good to soft going: 8.2% from 134. Strongest over 1m5f – 2m (all codes): 14.7% from 170. Weakest over 6f – 7f (all codes): 8.1% from 223.
- Who are Mergus Serrator's siblings?
- Out of Almareekh (USA), Mergus Serrator (IRE) has 1 other produce in our archive, 1 of them a winner. Most wins: Ayuq (IRE) (1). Highest grade won: Class 3 (Ayuq (IRE)). The wins came over 1m. As at Nov 2026.