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Horse profile

Sirious Oss (GB)

3yo gelding (at last run, May 2012) · Last trainer Michael Easterby · Last owner Backup Technology Steve Hull 1
by Sir Percy (GB) out of Groom Landing (PR) (Runaway Groom)
4 runs · 4 courses · from Oct 2011
As at 5 Nov 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 18 May 2012 — 5,284 days ago. Our archive can't say whether the horse is still in training.
Last run May 2012 · 11th of 11 Last raced off OR 69
KTB Profile

Sirious Oss (GB) is yet to win from 4 starts.

Based on 4 archived runs · updated 5 Nov 2026

KTB Speed and Rating

KTB Speed

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

KTB Rating

Best recent KTB Rating 54C the best of the last 3 rated runs · Doncaster, 21 Oct 2011 Official rating 69 at the last run, 18 May 2012

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code — its best recent day. The KTB Rating on a racecard is a different reading of the same figures: the level the horse has been running to, an average of up to its last six runs with the latest counting most, so the two can differ. A, B or C on a run is how much known form was in that race. What this means →

Flat 4 figures · best 77A · median 52
GoingRunsBestMedianSince 5 Nov 2025
Good254C52—
Good to Soft1———
Soft1———
DistanceRunsBestMedianSince 5 Nov 2025
1m2f – 1m4f250C47.5—
6f – 7f1———
1m – 1m1f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 4 figures from 4 runs · as at 4 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 is derived from in-running commentary, which our data provider does not supply for this horse's races.

Pedigree intelligence

Sire
Sir Percy (GB)

Progeny in our archive have won 11.2% of 7,153 runs since May 2011 (473 horses).

GoingRunsWinsSRvs sireThis horse
Firm52815.4%+4.2—
Good to Firm1,17614912.7%+1.5—
Good1,73619111%−0.20 from 2
Good to Soft908859.4%−1.80 from 1
Soft8598610%−1.20 from 1
Heavy2052713.2%+2—
Standard (AW)2,21725211.4%+0.2—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f90910%−1.2—
6f – 7f967848.7%−2.50 from 1
1m – 1m1f1,15211610.1%−1.10 from 1
1m2f – 1m4f2,51929911.9%+0.70 from 2
1m5f – 2m1,59219011.9%+0.7—
2m1f – 2m4f5156212%+0.8—
2m5f – 3m2482811.3%+0.1—
Over 3m701014.3%+3.1—

Flat and jumps together (all codes) · since May 2011 · as at 5 Nov 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Groom Landing (PR) (Runaway Groom)

2 siblings in the archive, 0 winners.

ProduceRunsWinsWin tripsBest grade
My Peggy Sue (GB)20——
Soaring Heights (GB)10——

Record by conditions

GoingRunsWinsSR£1
Good 2 0 0% −2.00
Good to Soft 1 0 0% −1.00
Soft 1 0 0% −1.00

ClassRunsWinsSR£1
Class 5 3 0 0% −3.00
Class 4 1 0 0% −1.00

CourseRunsWinsSR£1
York 1 0 0% −1.00
Thirsk 1 0 0% −1.00
Doncaster 1 0 0% −1.00
Newcastle 1 0 0% −1.00

DistanceRunsWinsSR£1
1m2f – 1m4f 2 0 0% −2.00
6f – 7f 1 0 0% −1.00
1m – 1m1f 1 0 0% −1.00

JockeyRunsWinsSR£1
James Sullivan 3 0 0% −3.00
Paul Mulrennan 1 0 0% −1.00

SeasonRunsWinsSR£1
2012 2 0 0% −2.00
2011 2 0 0% −2.00

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

DateCourseRace PosBtn Wgt ORKTB Jockey SP
2012 · 2 runs
18 May 12+13d York Sportingbet Handicap Class 4 · 1m4f · Good · 11 ran 11/11 9 8-11 6950C Paul Mulrennan 40/1
05 May 12+197d Thirsk Bet totepool Text tote To 89660 Maiden Stakes (Div 1) Class 5 · 1m4f · Good To Soft · 12 ran 9/12 9 8-9 —45C James Sullivan 28/1
2011 · 2 runs
21 Oct 11+10d Doncaster E.B.F. Mercedes-Benz Of Doncaster Fleet Maiden Stakes Class 5 · 7f · Good · 16 ran 14/16 8 9-3 —54C James Sullivan 50/1
11 Oct 11 Newcastle British Stallion Studs Supporting British Racing E.B.F. Maiden Stakes (Str) Class 5 · 1m · Soft · 13 ran 5/13 ½ 9-0 —77A James Sullivan 100/1

Quick answers

How many races has Sirious Oss won?
Sirious Oss (GB) has yet to win, from 4 archived starts between 2011 and 2012.
Who trained Sirious Oss?
Sirious Oss (GB) was trained by Michael Easterby on the most recent run on record, at York on 18 May 2012.
Who is Sirious Oss's sire?
Sirious Oss (GB) is by Sir Percy (GB) out of Groom Landing (PR), whose sire is Runaway Groom.
What is Sirious Oss's official rating?
The most recent official rating on record is 69, from the run on 18 May 2012. That is also the highest on record.
What is Sirious Oss's sire's record?
Sir Percy (GB)'s progeny in our archive have won 11.2% of 7,153 runs since May 2011 (473 horses), Flat and jumps together.
Who are Sirious Oss's siblings?
Out of Groom Landing (PR), Sirious Oss (GB) has 2 other produce in our archive, 0 of them winners. As at Nov 2026.

Record shown from October 2011. Our archive holds racing in Great Britain, Ireland and France from January 2005. Any runs before that, or in other countries, are not in it. In-running comments are available from 2024 onward.