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Horse profile

Diamond Circle (GB)

3yo filly (at last run, Oct 2005) · Last trainer B W Hills · Last owner Maktoum Al Maktoum
by Halling (USA) out of Canadian Mill (USA) (Mill Reef)
6 runs · 4 courses · from Jun 2005
As at 21 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 28 Oct 2005 — 7,662 days ago. Our archive can't say whether the horse is still in training.
Last run Oct 2005 · 6th of 11 2 wins · Newmarket & Ripon Last raced off OR 85
KTB Profile

Diamond Circle (GB) is 2 from 6. Hasn't won since Oct 2005. Last raced off a career-high mark of 85.

Based on 6 archived runs · updated 21 Oct 2026
KTB at a glance OR at career high

Progeny in our archive

Produce record

As a dam, Diamond Circle (GB) has 3 produce in the archive, 2 winners — most wins Beauty Happy (IRE) (1 win).

The wins came over 5½f–1m2f; the highest grade won is Class 6 (Amalfi Gem (IRE)).

ProduceRunsWinsWin tripsBest grade
Beauty Happy (IRE)411m2f—
Amalfi Gem (IRE)1715½fClass 6
Cincinnati Girl (IRE)80——
Official rating85At career-high mark
85 77–85

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 90C the best of the last 3 rated runs · Newmarket, 1 Oct 2005 Official rating 85 at the last run, 28 Oct 2005

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 5 figures · best 90C · median 67
GoingRunsBestMedianSince 21 Oct 2025
Good to Firm370C67—
Soft290C71.5—
DistanceRunsBestMedianSince 21 Oct 2025
1m5f – 2m390C70—
1m2f – 1m4f267C54—

Of 6 runs looked at, 1 has no figure: no runner of known ability in the race — the level cannot be solved (1).

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 5 figures from 6 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
Halling (USA)

Progeny in our archive have won 11% of 6,095 runs since Jan 2008 (409 horses).

Weakest over 2m5f – 3m (all codes): 4.8% from 187.

GoingRunsWinsSRvs sireThis horse
Firm72811.1%+0.1—
Good to Firm1,15114612.7%+1.71 from 4
Good1,60617911.1%+0.1—
Good to Soft7518311.1%+0.1—
Soft7898911.3%+0.31 from 2
Heavy2562810.9%−0.1—
Standard (AW)1,4701369.3%−1.7—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f3638.3%−2.7—
6f – 7f578488.3%−2.7—
1m – 1m1f979939.5%−1.5—
1m2f – 1m4f2,07924711.9%+0.91 from 3
1m5f – 2m1,59219612.3%+1.31 from 3
2m1f – 2m4f6146811.1%+0.1—
2m5f – 3m18794.8%−6.2—
Over 3m30516.7%+5.7—

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

Dam
Canadian Mill (USA) (Mill Reef)

No other produce in our archive. It holds racing in Great Britain, Ireland and France from 2005, so siblings racing elsewhere won’t appear here.

Record by conditions

GoingRunsWinsSR£1
Good to Firm 4 1 25% −0.25
Soft 2 1 50% +15.00

ClassRunsWinsSR£1
Class 4 3 1 33% +14.00
Class 3 2 0 0% −2.00
Class 5 1 1 100% +2.75

CourseRunsWinsSR£1
Newmarket 3 1 33% +14.00
Windsor 1 0 0% −1.00
Chester 1 0 0% −1.00
Ripon 1 1 100% +2.75

DistanceRunsWinsSR£1
1m5f – 2m 3 1 33% +14.00
1m2f – 1m4f 3 1 33% +0.75

JockeyRunsWinsSR£1
Martin Dwyer 2 1 50% +15.00
Darryll Holland 1 0 0% −1.00
Steve Drowne 1 0 0% −1.00
Michael Hills 1 0 0% −1.00
Paul Hanagan 1 1 100% +2.75

HeadgearRunsWinsSR£1
None 4 1 25% −0.25
Cheekpieces 2 1 50% +15.00

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
28 Oct 05+27d Newmarket Lloyds TSB Handicap Class 3 · 16f · Soft · 11 ran 6/11 5 8-12 8553C Martin Dwyer 4/1
01 Oct 05+28d Newmarket Home Of Horse Racing Handicap Class 4 · 14f · Soft · 17 ran 1/17 9-0 7990C Martin Dwyer 16/1
03 Sep 05+28d Newmarket 32redpoker.com Handicap Class 4 · 15f · Good To Firm · 8 ran 2/8 1 9-3 7770C Darryll Holland 14/1
06 Aug 05+29d Windsor Intercasino.com Handicap Class 3 · 11.5f · Good To Firm · 9 ran 7/9 1¼ 8-8 7967C Steve Drowne 16/1
08 Jul 05+27d Chester Ethel Austin Handicap Class 4 · 10.5f · Good To Firm · 7 ran 7/7 9 9-2 8241C Michael Hills 7/2
11 Jun 05 Ripon Toteexacta Maiden Fillies' Stakes Class 5 · 10f · Good To Firm · 9 ran 1/9 8-11 —— Paul Hanagan 11/4F

Quick answers

How many races has Diamond Circle (GB) won?
Diamond Circle (GB) won 2 of 6 archived starts in 2005, a strike rate of 33.3%. Placed 3 times in total (50% of starts).
Who trained Diamond Circle (GB)?
Diamond Circle (GB) was trained by B W Hills on the most recent run on record, at Newmarket on 28 October 2005.
Who is Diamond Circle (GB)'s sire?
Diamond Circle (GB) is by Halling (USA) out of Canadian Mill (USA), whose sire is Mill Reef.
What going does Diamond Circle (GB) prefer?
Diamond Circle (GB) has the best record on good to firm going: 1 win from 4 starts (25%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is Diamond Circle (GB)'s official rating?
The most recent official rating on record is 85, from the run on 28 October 2005. That is also the highest on record.
What is Diamond Circle (GB)'s sire's record?
Halling (USA)'s progeny in our archive have won 11% of 6,095 runs since Jan 2008 (409 horses), Flat and jumps together. Weakest over 2m5f – 3m (all codes): 4.8% from 187.
Has Diamond Circle (GB) produced winners?
As a dam, Diamond Circle (GB) has 3 produce in our archive, 2 of them winners. Most wins: Beauty Happy (IRE) (1). Highest grade won: Class 6 (Amalfi Gem (IRE)). The wins came over 5½f–1m2f. As at Oct 2026.

Record shown from June 2005. 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.