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Horse profile

You'll Be Mine (USA)

3yo filly (at last run, Nov 2010) · Last trainer A P O'Brien · Last owner Mrs Richard Henry
by Kingmambo (USA) out of Quarter Moon (IRE) (Sadler's Wells)
10 runs · 6 courses · from Aug 2009
As at 28 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 12 Nov 2010 — 5,829 days ago. Our archive can't say whether the horse is still in training.
Last run Nov 2010 · 7th of 14 Won at Leopardstown Last raced off OR 102
KTB Profile

You'll Be Mine (USA) is 1 from 10. Hasn't won since Sep 2009.

Based on 10 archived runs · updated 28 Oct 2026

Progeny in our archive

Produce record

As a dam, You'll Be Mine (USA) has 4 produce in the archive, 3 winners — most wins Eminent (IRE) (3 wins).

The wins came over 6f–1m2f; the highest grade won is Group 2 (Eminent (IRE)).

ProduceRunsWinsWin tripsBest grade
Eminent (IRE)1131m–1m2fGroup 2
As Good As Gold (IRE)1626fClass 5
King Frankel (IRE)1011m2fClass 5
Copper Point (IRE)70——
Official rating102↓ 3lb off peak
102 97–105

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 84A the best of the last 3 rated runs · Dundalk (AW), 12 Nov 2010 Official rating 102 at the last run, 12 Nov 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 10 figures · best 93A · median 80.5
GoingRunsBestMedianSince 28 Oct 2025
Standard (AW)284A83.5—
Good to Firm275A68.5—
Good to Soft293A89.5—
Soft278A73—
Good288A83—
DistanceRunsBestMedianSince 28 Oct 2025
1m – 1m1f488A81—
1m2f – 1m4f386A83—
6f – 7f393A78—

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 10 figures from 10 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
Kingmambo (USA)

Progeny in our archive have won 14.5% of 1,093 runs since Jan 2008 (137 horses).

Weakest on soft going: 10.9% from 138. Strongest over 1m – 1m1f (all codes): 18.1% from 243.

GoingRunsWinsSRvs sireThis horse
Firm19631.6%+17.1—
Good to Firm2363715.7%+1.20 from 2
Good3264814.7%+0.20 from 2
Good to Soft1461812.3%−2.21 from 2
Soft1381510.9%−3.60 from 2
Heavy52815.4%+0.9—
Standard (AW)1762614.8%+0.30 from 2
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f10110%−4.5—
6f – 7f1502114%−0.51 from 3
1m – 1m1f2434418.1%+3.60 from 4
1m2f – 1m4f3725715.3%+0.80 from 3
1m5f – 2m1552214.2%−0.3—
2m1f – 2m4f8478.3%−6.2—
2m5f – 3m6557.7%−6.8—
Over 3m1417.1%−7.4—

Flat and jumps together (all codes) · since Jan 2008 · as at 28 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Quarter Moon (IRE) (Sadler's Wells)

8 siblings in the archive, 6 winners — best of them Diamondsandrubies (IRE) (3 wins).

The wins came over 7f–1m3½f; the highest grade won is Group 1 (Diamondsandrubies (IRE)).

ProduceRunsWinsWin tripsBest grade
Diamondsandrubies (IRE)931m1f–1m3½fGroup 1
War Tiger (USA)621m1½fClass 4
How High The Moon (IRE)1117f—
Born To Be King (USA)717f—
King Of Westphalia (USA)1311m2f—
Dance With Another (IRE)1211m—
Hibernian Warrior (USA)100——
Half Moon (IRE)40——

Record by conditions

GoingRunsWinsSR£1
Standard (AW) 2 0 0% −2.00
Good to Firm 2 0 0% −2.00
Good to Soft 2 1 50% +0.75
Soft 2 0 0% −2.00
Good 2 0 0% −2.00

ClassRunsWinsSR£1
Class 1 2 0 0% −2.00

CourseRunsWinsSR£1
Leopardstown 4 1 25% −1.25
Dundalk (AW) 2 0 0% −2.00
Newmarket 1 0 0% −1.00
Gowran Park 1 0 0% −1.00
Curragh 1 0 0% −1.00
Ascot 1 0 0% −1.00

DistanceRunsWinsSR£1
1m – 1m1f 4 0 0% −4.00
1m2f – 1m4f 3 0 0% −3.00
6f – 7f 3 1 33% −0.25

JockeyRunsWinsSR£1
Johnny Murtagh 7 1 14% −4.25
Seamie Heffernan 2 0 0% −2.00
Colm O'Donoghue 1 0 0% −1.00

SeasonRunsWinsSR£1
2010 7 0 0% −7.00
2009 3 1 33% −0.25

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 · 7 runs
12 Nov 10+6d Dundalk (AW) Irish Stallion Farms European Breeders Fund Cooley Fillies Stakes (Listed) 8f · Standard · 14 ran 7/14 hd 8-12 10284A Johnny Murtagh 9/2
06 Nov 10+12d Dundalk (AW) Carlingford Stakes (Listed) 10.5f · Standard · 12 ran 4/12 1 8-12 10383A Seamie Heffernan 8/1
25 Oct 10+9d Leopardstown Trigo Stakes (Listed) 10f · Good To Firm · 14 ran 9/14 ½ 8-12 10375A Johnny Murtagh 5/1
16 Oct 10+21d Newmarket Pride Stakes (Fillies Group 2) Class 1 · 12f · Good To Soft · 12 ran 6/12 ½ 8-10 9786A Johnny Murtagh 33/1
25 Sep 10+27d Gowran Park Denny Cordell Lavarack & Lanwades Stud Fillies Stakes (Group 3) 9.5f · Yielding · 12 ran 7/12 4 8-11 10278A Colm O'Donoghue 16/1
29 Aug 10+154d Curragh Dance Design Stakes (Fillies' Group 3) 9f · Good To Firm · 12 ran 11/12 3 8-12 10562A Johnny Murtagh 9/2
28 Mar 10+183d Leopardstown Leopardstown 1,000 Guineas Trial Stakes (group 3) 7f · Soft · 11 ran 9/11 ½ 9-0 10568A Seamie Heffernan 6/1
2009 · 3 runs
26 Sep 09+21d Ascot Meon Valley Stud Fillies' Mile (Group 1) Class 1 · 8f · Good · 9 ran 3/9 1½ 8-12 —88A Johnny Murtagh 7/2
05 Sep 09+23d Leopardstown Irish Independent E.B.F. Fillies Maiden 7f · Good To Yielding · 18 ran 1/18 9-0 —93A Johnny Murtagh 7/4F
13 Aug 09 Leopardstown Tattersalls E.B.F Fillies Maiden 7f · Good · 15 ran 4/15 2 9-0 —78A Johnny Murtagh 11/2

Quick answers

How many races has You'll Be Mine won?
You'll Be Mine (USA) won 1 of 10 archived starts between 2009 and 2010, a strike rate of 10%. Placed 2 times in total (20% of starts).
Who trained You'll Be Mine?
You'll Be Mine (USA) was trained by A P O'Brien on the most recent run on record, at Dundalk (AW) on 12 November 2010.
Who is You'll Be Mine's sire?
You'll Be Mine (USA) is by Kingmambo (USA) out of Quarter Moon (IRE), whose sire is Sadler's Wells.
What is You'll Be Mine's official rating?
The most recent official rating on record is 102, from the run on 12 November 2010. The highest on record is 105.
What is You'll Be Mine's sire's record?
Kingmambo (USA)'s progeny in our archive have won 14.5% of 1,093 runs since Jan 2008 (137 horses), Flat and jumps together. Weakest on soft going: 10.9% from 138. Strongest over 1m – 1m1f (all codes): 18.1% from 243.
Who are You'll Be Mine's siblings?
Out of Quarter Moon (IRE), You'll Be Mine (USA) has 8 other produce in our archive, 6 of them winners. Most wins: Diamondsandrubies (IRE) (3). Highest grade won: Group 1 (Diamondsandrubies (IRE)). The wins came over 7f–1m3½f. As at Oct 2026.
Has You'll Be Mine produced winners?
As a dam, You'll Be Mine (USA) has 4 produce in our archive, 3 of them winners. Most wins: Eminent (IRE) (3). Highest grade won: Group 2 (Eminent (IRE)). The wins came over 6f–1m2f. As at Oct 2026.

Record shown from August 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.