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Horse profile

Magnesium (GB)

2yo filly · Trainer John Butler · Owner Abdullateef Al Zeer
by Ubettabelieveit (IRE) out of Dharwa (GB) (Equiano)
5 runs · 2 courses · from May 2026
As at 18 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
Won last time out 2 wins · Kempton (AW) Ran 42 days ago · 1st of 8 Last raced off OR 71
KTB Profile

Magnesium won two of five starts. Both wins came at Kempton on standard AW, one in a Class 4 novice over 6f to 7f in May 2026 and the latest in a Class 5 fillies nursery handicap over 1m to 1m1f in Sep 2026. She has never won on turf from three starts. The filly was aged 2 at her last run in Sep 2026.

Based on 5 archived runs · run-style from 3 commented runs · updated 18 Oct 2026

KTB Speed and Rating

KTB Speed

Best recent Speed 75 the best of the last 3 graded (A or B) runs · Kempton (AW), 20 May 2026

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 →

Flat 5 figures · best 75A · median 73
GoingRunsBestMedianSince 18 Oct 2025
Standard (AW)275A74.52 · 75 / 74.5
Good to Firm273A612 · 73 / 61
Good1——1 · —
DistanceRunsBestMedianSince 18 Oct 2025
6f – 7f375A733 · 75 / 73
1m – 1m1f1——1 · —
Under 6f1——1 · —

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 5 figures from 5 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 91A the best of the last 3 rated runs · Kempton (AW), 5 Sep 2026 Official rating 71 at the last run, 5 Sep 2026

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 91A · median 77
GoingRunsBestMedianSince 18 Oct 2025
Standard (AW)291A862 · 91 / 86
Good to Firm277A73.52 · 77 / 73.5
Good1——1 · —
DistanceRunsBestMedianSince 18 Oct 2025
6f – 7f381A773 · 81 / 77
1m – 1m1f1——1 · —
Under 6f1——1 · —

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 5 figures from 5 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 from 3 analysed runs

  • Midfield 1 (33%) · 0 wins
  • Held up 1 (33%) · 0 wins
  • Led 1 (33%) · 1 win

Pedigree intelligence

Sire

Progeny in our archive have won 10.6% of 452 runs since Jan 2008 (77 horses).

GoingRunsWinsSRvs sireThis horse
Firm6233.3%+22.7—
Good to Firm971414.4%+3.80 from 2
Good1341410.4%−0.20 from 1
Good to Soft4524.4%−6.2—
Soft2827.1%−3.5—
Heavy300%−10.6—
Standard (AW)1391410.1%−0.52 from 2
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f147149.5%−1.10 from 1
6f – 7f2342510.7%+0.11 from 3
1m – 1m1f48612.5%+1.91 from 1
1m2f – 1m4f23313%+2.4—

Flat and jumps together (all codes) · since Jan 2008 · as at 18 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Dharwa (GB) (Equiano)

4 siblings in the archive, 3 winners — best of them I'm Next (GB) (6 wins).

The wins came over 5f–1m2f; the highest grade won is Class 3 (I'm Next (GB)).

ProduceRunsWinsWin tripsBest grade
I'm Next (GB)2665fClass 3
Estepona Sun (GB)4127f–1m2f—
Gundogan (GB)3116fClass 5
Jazper (GB)30——

Record by conditions

GoingRunsWinsSR£1
Standard (AW) 2 2 100% +12.50
Good to Firm 2 0 0% −2.00
Good 1 0 0% −1.00

ClassRunsWinsSR£1
Class 1 2 0 0% −2.00
Class 5 1 1 100% +6.50
Class 4 1 1 100% +6.00
Class 2 1 0 0% −1.00

CourseRunsWinsSR£1
Ascot 3 0 0% −3.00
Kempton (AW) 2 2 100% +12.50

DistanceRunsWinsSR£1
6f – 7f 3 1 33% +4.00
1m – 1m1f 1 1 100% +6.50
Under 6f 1 0 0% −1.00

JockeyRunsWinsSR£1
David Egan 2 1 50% +5.00
Rossa Ryan 1 1 100% +6.50
Silvestre De Sousa 1 0 0% −1.00
Ray Dawson 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

DateCourseRace PosBtn Wgt ORSpdKTB Jockey SP
05 Sep 26+42d Kempton (AW) William Hill Epic Boost Fillies' Nursery Handicap Stakes Class 5 · 8f · Standard / Slow · 8 ran settled in the pack - pushed forward to challenge 2f out - shared advantage entering final furlong - edged clear close home to score 1/8 9-5 7174A91A Rossa Ryan 13/2
25 Jul 26+36d Ascot Princess Margaret Japan Cup Stakes (Group 3) Class 1 · 6f · Good To Firm · 11 ran Settled in the middle of the track and went up with the front-runner - dropped back and driven over two furlongs out before soon struggling without a chance 10/11 3½ 9-2 7473A70A Silvestre De Sousa 200/1
19 Jun 26+30d Ascot Albany Stakes (Fillies' Group 3) Class 1 · 6f · Good To Firm · 25 ran Held up in the pack - pushed along and dropped away 2f out - unable to threaten leaders in the closing stages - well held in 18th 18/25 hd 9-2 —49C77A Ray Dawson 300/1
20 May 26+12d Kempton (AW) Unibet/British Stallion Studs EBF Fillies' Restricted Novice Stakes (GBB Race) Class 4 · 6f · Standard To Slow · 10 ran Set the pace from the start - came under pressure over a furlong out but kept finding more - driven out inside the final 110 yards - held on to prevail 1/10 8-13 —75A81A David Egan 6/1
08 May 26 Ascot Juddmonte EBF Fillies' Restricted Novice Stakes (GBB Race) Class 2 · 5f · Good · 12 ran Drifted right at the off - settled towards the back - nudged into contention approaching final furlong before fading late 7/12 nse 8-13 —72A70A David Egan 16/1

Quick answers

How many races has Magnesium (GB) won?
Magnesium (GB) won 2 of 5 archived starts in 2026, a strike rate of 40%. Placed 2 times in total (40% of starts).
Who trains Magnesium (GB)?
Magnesium (GB) is trained by John Butler, who saddled the horse on its most recent run on 5 September 2026.
Who is Magnesium (GB)'s sire?
Magnesium (GB) is by Ubettabelieveit (IRE) out of Dharwa (GB), whose sire is Equiano.
What is Magnesium (GB)'s official rating?
The most recent official rating on record is 71, from the run on 5 September 2026. The highest on record is 74.
What is Magnesium (GB)'s sire's record?
Ubettabelieveit (IRE)'s progeny in our archive have won 10.6% of 452 runs since Jan 2008 (77 horses), Flat and jumps together.
Who are Magnesium (GB)'s siblings?
Out of Dharwa (GB), Magnesium (GB) has 4 other produce in our archive, 3 of them winners. Most wins: I'm Next (GB) (6). Highest grade won: Class 3 (I'm Next (GB)). The wins came over 5f–1m2f. As at Oct 2026.

Record shown from May 2026. 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.