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Horse profile

Emperor Claudius (USA)

3yo colt (at last run, Jun 2010) · Last trainer A P O'Brien · Last owner Michael Tabor
by Giant's Causeway (USA) out of Virginia Waters (USA) (Kingmambo)
8 runs · 7 courses · from May 2009
As at 27 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 27 Jun 2010 — 5,966 days ago. Our archive can't say whether the horse is still in training.
Last run Jun 2010 · 1st of 10 Won last time out 4 wins · Curragh, Naas & Fairyhouse Last raced off OR 106
KTB Profile

Emperor Claudius (USA) is 4 from 8, including a Listed win. Won last time out in the Woodies D.I.Y. Celebration Stakes at Curragh — a first Listed win in our archive. Last raced off a career-high mark of 106.

Based on 8 archived runs · updated 27 Oct 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 94A the best of the last 3 rated runs · Curragh, 27 Jun 2010 Official rating 106 at the last run, 27 Jun 2010

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. A, B or C on a run is how much known form was in that race. What this means →

Flat 8 figures · best 106A · median 86.5
GoingRunsBestMedianSince 27 Oct 2025
Good to Firm7106A88—
Good1———
DistanceRunsBestMedianSince 27 Oct 2025
6f – 7f7106A85—
1m – 1m1f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 8 figures from 8 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
Giant's Causeway (USA)

Progeny in our archive have won 11.6% of 3,018 runs since Jan 2008 (320 horses).

Weakest on soft going: 7.1% from 394. Weakest over 1m5f – 2m (all codes): 8.3% from 422.

GoingRunsWinsSRvs sireThis horse
Firm3937.7%−3.9—
Good to Firm6058313.7%+2.14 from 7
Good6556710.2%−1.40 from 1
Good to Soft290227.6%−4—
Soft394287.1%−4.5—
Heavy1582012.7%+1.1—
Standard (AW)87712614.4%+2.8—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f27518.5%+6.9—
6f – 7f5957312.3%+0.73 from 7
1m – 1m1f7368912.1%+0.51 from 1
1m2f – 1m4f84610712.6%+1—
1m5f – 2m422358.3%−3.3—
2m1f – 2m4f202199.4%−2.2—
2m5f – 3m123118.9%−2.7—
Over 3m671014.9%+3.3—

Flat and jumps together (all codes) · since Jan 2008 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam

9 siblings in the archive, 3 winners — best of them Dove Mountain (IRE) (4 wins).

The wins came over 7f–2m; the highest grade won is Class 4 (Dove Mountain (IRE)).

ProduceRunsWinsWin tripsBest grade
Dove Mountain (IRE)5347f–2mClass 4
Dark Lochnagar (USA)2221m1f–1m2½fClass 4
Lizard Point (IRE)4211m2½f—
Where (IRE)40——
Ballroom (IRE)70——
Tefnut (USA)110——
Hyper Dream (IRE)20——
Marie Toulouse (IRE)50——
Visalia (IRE)10——

Record by conditions

GoingRunsWinsSR£1
Good to Firm 7 4 57% +2.55
Good 1 0 0% −1.00

ClassRunsWinsSR£1
Class 1 3 0 0% −3.00

CourseRunsWinsSR£1
Fairyhouse 2 2 100% +3.05
Curragh 1 1 100% +2.00
Naas 1 1 100% +0.50
Doncaster 1 0 0% −1.00
Newmarket 1 0 0% −1.00
Ascot 1 0 0% −1.00
Leopardstown 1 0 0% −1.00

DistanceRunsWinsSR£1
6f – 7f 7 3 43% −0.45
1m – 1m1f 1 1 100% +2.00

JockeyRunsWinsSR£1
Johnny Murtagh 3 2 67% +1.80
Sean Levey 2 1 50% +1.25
Joseph O'Brien 1 1 100% +0.50
Ryan Moore 1 0 0% −1.00
Seamie Heffernan 1 0 0% −1.00

SeasonRunsWinsSR£1
2010 3 3 100% +4.75
2009 5 1 20% −3.20

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
2010 · 3 runs
27 Jun 10+4d Curragh Woodies D.I.Y. Celebration Stakes (Listed) 8f · Good To Firm · 10 ran 1/10 8-13 10694A Johnny Murtagh 2/1F
23 Jun 10+7d Naas Naas Summer Evenings Race 7f · Good To Firm · 3 ran 1/3 8-9 10675C Joseph O'Brien 1/2F
16 Jun 10+277d Fairyhouse Bobbyjo Bistro Race 7f · Good To Firm · 5 ran 1/5 9-0 10688B Sean Levey 9/4
2009 · 5 runs
12 Sep 09+64d Doncaster DFS Champagne Stakes (Group 2) Class 1 · 7f · Good To Firm · 7 ran 6/7 1½ 8-12 —76A Sean Levey 16/1
10 Jul 09+20d Newmarket Meydan Superlative Stakes (Group 2) Class 1 · 7f · Good To Firm · 8 ran 6/8 nse 9-0 —85A Johnny Murtagh 13/8F
20 Jun 09+17d Ascot Chesham Stakes (Listed) Class 1 · 7f · Good To Firm · 16 ran 2/16 shd 9-3 —106A Ryan Moore 4/1J
03 Jun 09+24d Fairyhouse Irish Stallion Farms E.B.F Auction Maiden 6f · Good To Firm · 17 ran 1/17 9-0 —104A Johnny Murtagh 4/5F
10 May 09 Leopardstown Irish Stallion Farms E.B.F Auction Maiden 6f · Good · 10 ran 3/10 1¼ 9-0 —77A Seamie Heffernan 5/4F

Quick answers

How many races has Emperor Claudius won?
Emperor Claudius (USA) won 4 of 8 archived starts between 2009 and 2010, a strike rate of 50%. Placed 6 times in total (75% of starts).
Who trained Emperor Claudius?
Emperor Claudius (USA) was trained by A P O'Brien on the most recent run on record, at Curragh on 27 June 2010.
Who is Emperor Claudius's sire?
Emperor Claudius (USA) is by Giant's Causeway (USA) out of Virginia Waters (USA), whose sire is Kingmambo.
What going does Emperor Claudius prefer?
Emperor Claudius (USA) has the best record on good to firm going: 4 wins from 7 starts (57.1%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is Emperor Claudius's official rating?
The most recent official rating on record is 106, from the run on 27 June 2010. That is also the highest on record.
What is Emperor Claudius's sire's record?
Giant's Causeway (USA)'s progeny in our archive have won 11.6% of 3,018 runs since Jan 2008 (320 horses), Flat and jumps together. Weakest on soft going: 7.1% from 394. Weakest over 1m5f – 2m (all codes): 8.3% from 422.
Who are Emperor Claudius's siblings?
Out of Virginia Waters (USA), Emperor Claudius (USA) has 9 other produce in our archive, 3 of them winners. Most wins: Dove Mountain (IRE) (4). Highest grade won: Class 4 (Dove Mountain (IRE)). The wins came over 7f–2m. As at Oct 2026.

Record shown from May 2009. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.