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Horse profile

Boombox (IRE)

5yo mare · Trainer Harry Derham · Owner Olbg Racing (boombox)
by Jukebox Jury (IRE) out of Soeur Dee (IRE) (Definite Article)
2 runs · 2 courses · from May 2026
As at 25 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
New yard Last run 21 Oct 2026 · 2nd of 9
KTB Profile

Boombox is a lightly raced mare with two placed efforts from two starts since May 2026. She finished second of nine at Worcester in Oct 2026, having raced prominently in the Richard And Ann Hitchings Memorial Mares' Novices' Hurdle Race, a Class 4 event over 2m1f – 2m4f on good to soft. Her last run, at Worcester in Oct 2026, was her first for Harry Derham. By Jukebox Jury, whose progeny have won 299 of 2,221 runs since Jan 2008. Her dam has produced two winners from three runners to date.

Based on 2 archived runs · run-style from 1 commented run since Oct 2026 · updated 25 Oct 2026

KTB Speed and Rating

KTB Speed

Best recent Speed 110 the best of the last 2 graded (A or B) runs · Worcester, 21 Oct 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 →

Jumps 2 figures · best 110A · median 105.5
GoingRunsBestMedianSince 25 Oct 2025
Good to Soft2110A105.52 runs · 110 / 105.5
DistanceRunsBestMedianSince 25 Oct 2025
1m5f – 2m1——1 run · —
2m1f – 2m4f1——1 run · —

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 2 figures from 2 runs · as at 25 Oct 2026 · 1 recent figure provisional (may move for 7 days) · a record, not a forecast

KTB Rating

Best recent KTB Rating 131B the best of the last 2 rated runs · Worcester, 21 Oct 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 →

Jumps 2 figures · best 131B · median 120
GoingRunsBestMedianSince 25 Oct 2025
Good to Soft2131B1202 runs · 131 / 120
DistanceRunsBestMedianSince 25 Oct 2025
1m5f – 2m1——1 run · —
2m1f – 2m4f1——1 run · —

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 2 figures from 2 runs · as at 25 Oct 2026 · 1 recent figure provisional (may move for 7 days) · 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.

Pedigree intelligence

Sire

Progeny in our archive have won 13.4% of 2,230 runs since Jan 2008 (254 horses).

Weakest on standard (aw) going: 10.3% from 155.

GoingRunsWinsSRvs sireThis horse
Good to Firm601016.7%+3.3—
Good6278012.8%−0.6—
Good to Soft4695010.7%−2.70 from 2
Soft65810215.5%+2.1—
Heavy2614115.7%+2.3—
Standard (AW)1551610.3%−3.1—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f200%−13.4—
6f – 7f6346.3%−7.1—
1m – 1m1f961010.4%−3—
1m2f – 1m4f1461812.3%−1.1—
1m5f – 2m6669213.8%+0.40 from 1
2m1f – 2m4f74710514.1%+0.70 from 1
2m5f – 3m4295713.3%−0.1—
Over 3m811316%+2.6—

Flat and jumps together (all codes) · since Jan 2008 · as at 25 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Soeur Dee (IRE) (Definite Article)

3 siblings in the archive, 2 winners — best of them Mclaurey (IRE) (2 wins).

The wins came over 2m–2m2½f; the highest grade won is Listed (Mclaurey (IRE)).

ProduceRunsWinsWin tripsBest grade
Mclaurey (IRE)1222mListed
Telnobody (IRE)812m2½f—
Papillondelumiere (IRE)50——

Too few runs for meaningful splits. The full record is below.

Form

DateCourseRace PosBtn Wgt SpdKTB Jockey SP
2026 · 2 runs
21 Oct 26+163d Worcester Richard And Ann Hitchings Memorial Mares' Novices' Hurdle Race (Herring Queen Mares' Novices' Hurdle Series Qualifier) (Div I) (GBB Race) Class 4 · 16f · Good To Soft · 9 ran sat close behind the winner - cruised up to loom alongside before 2 out - responded again after the last - edged in front near the finish - collared on the line to finish second by a short head 2/9 shd 11-0 110A131B Paul O'Brien 13/8
11 May 26 Killarney Executive Helicopters Ladies (Pro/Am) Flat Race 17f · Good To Yielding · 11 ran Settled early - moved into third by halfway - pushed into second inside the last two furlongs but couldn't reel in the front-runner - stayed on to finish second 2/11 3¼ 11-0 101A109A Miss N Lockhead Anderson 9/1

Quick answers

How many races has Boombox won?
Boombox (IRE) has yet to win, from 2 archived starts in 2026. Placed 2 times in total (100% of starts).
Who trains Boombox?
Boombox (IRE) is trained by Harry Derham, who saddled the horse on its most recent run on 21 October 2026.
Who is Boombox's sire?
Boombox (IRE) is by Jukebox Jury (IRE) out of Soeur Dee (IRE), whose sire is Definite Article.
What is Boombox's sire's record?
Jukebox Jury (IRE)'s progeny in our archive have won 13.4% of 2,230 runs since Jan 2008 (254 horses), Flat and jumps together. Weakest on standard (aw) going: 10.3% from 155.
Who are Boombox's siblings?
Out of Soeur Dee (IRE), Boombox (IRE) has 3 other produce in our archive, 2 of them winners. Most wins: Mclaurey (IRE) (2). Highest grade won: Listed (Mclaurey (IRE)). The wins came over 2m–2m2½f. 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.