Skip to content
Trainer profile

B De Montzey

501 runners in the lifetime window · 171 individual horses
As at 12 Nov 2026 · KTB archive: 2005–present, updated daily
Last runner yesterday 90% of runners on the flat
Last 5 seasons Lifetime (2008→)
from 1 Jan 2008 — the aggregate floor: every horse in the window has a complete captured career behind it
57–501
Wins / Runs
11.4%
Strike rate
n=501
130 (26%)
Placed
1.02
Fair A/E
n=411 · 0.97 incl. margin
+15.45
£1 level stake
n=448 at SP · +3.4%
£1.75m
Prize money (window)
Strike by season
9.1%
KTB Yard Profile

Sends out around 30 runners a season, almost all on the flat, winning with 11% of them — level with the margin-free market read across the lifetime window (Fair A/E 1.02). Horses in first-time headgear strike at 15% (46 runs, true-first definition).

Deterministic profile computed from 501 archived runs (lifetime window) · updated 12 Nov 2026
KTB at a glance 40% when favourite Thierry Jarnet: 15.2% from 66 Sends off the favourite in 8% of races
The read

It is weakest at Longchamp (FR) (5.6% over 54 runners) — the widest gap in the record. A horse in first-time headgear has been a positive signal at 15.2% (n=46, Fair A/E 1.56), but runners with a claiming rider up have been a poor signal at 6.7% (n=60, Fair A/E 0.74). The market has consistently overbet horses returning fresh after 61+ days: 7.1% strike, Fair A/E 0.78 and −41.20 to a £1 stake over 126 runners — those runners underperform what the price implies. Thierry Jarnet rides 13% of the entries and edges the yard's average (15.2% vs 11.4%, A/E 1.67) — the partnership beats the margin-free market read. The yard also reads well off a 31-60-day break (18.1%, n=72). The record reads poorly off a break of 180+ days — 4.3% over 46 runners, 7.1pts below the baseline. 10 Group and Graded wins sit in the archive record — the biggest prize the yard has landed: the Prix de Sandringham at Chantilly (FR) (Jun 2017, £63,333).

Written from the figures on this page — every claim carries its sample. Descriptive, not a tip.

Yard patterns

the angles behind the record · vs 11.4% baseline
Fresh · 61+ days off
7.1%−4.3
n=126 · A/E 0.78 · £1 −41.20
New recruits · first run for the yard
11.8%+0.4
n=17 · A/E 1.03 · £1 −9.40
Debutants · first career start
11%−0.4
n=154 · A/E 0.97 · £1 −48.65
First-time headgear · true-first definition
15.2%+3.8
n=46 · A/E 1.56 · £1 +4.75
Headgear returns · back on after a bare run
0%−11.4
n=8 · A/E 0.00 · £1 −6.00
When favourite
40%
n=40 · A/E 1.37 · £1 +69.35
Claiming riders · a claimer in the saddle
6.7%−4.7
n=60 · A/E 0.74 · £1 −32.80
Group / Graded races · pattern & listed
10.3%−1.1
n=97 · A/E 1.38 · £1 +58.80

Each tile is the record in that situation vs the 11.4% baseline — descriptive splits with the sample always shown, for you to weigh. Tiles under 30 runs render muted. Headgear figures use the true-first definition (first gear appearance in the captured career); returns are gear back on after a bare run. Claiming riders are runs where the booked rider carried a weight claim. Group / Graded covers pattern and listed races. The same beliefs, tested across every yard and every GB and Irish race since 2005: Racing myths.

Notable angles

vs their own baseline
Off a 31-60-day break 18.1% vs 11.4% · n=72
Off a break of 180+ days 4.3% vs 11.4% · n=46
At Longchamp (FR) 5.6% vs 11.4% · n=54
With Jimmy Martin 17.5% vs 11.4% · n=40
At Saint-Cloud (FR) 6% vs 11.4% · n=50
With claiming riders up 6.7% vs 11.4% · n=60
Descriptive splits ranked by divergence × sample — insight, not instruction. Every angle carries its N; nothing under 30 runs qualifies. Rows within 2pts of the baseline appear only when the market-relative read (Fair A/E) diverges, and show it.

Record by conditions

same window as header

Race type

TypeRWSR£1
Flat 451 52 11.5% +2.35
Hurdle 40 3 7.5% −27.30
Chase 10 2 20% +40.40

Going

GoingRWSR£1
Standard (AW) 131 16 12.2% +14.30
Soft 111 14 12.6% +12.50
Good to Soft 99 11 11.1% +28.85
Good 99 9 9.1% −54.20
Heavy 60 7 11.7% +15.00
Good to Firm 1 0 0% −1.00

Courses

CourseRWSR£1
Deauville (FR) 145 18 12.4% +11.30
Longchamp (FR) 54 3 5.6% −30.60
Chantilly (FR) 53 4 7.5% −8.70
Saint-Cloud (FR) 50 3 6% −36.00
Bordeaux Le Bouscat 36 6 16.7% +9.50
Maisons-Laffitte (FR) 33 5 15.2% +24.30
La Teste De Buch 27 6 22.2% +51.95
Toulouse 27 1 3.7% −18.20
Auteuil (FR) 18 2 11.1% +34.40
Mont-De-Marsan 12 2 16.7% −4.10
Dax 11 4 36.4% +1.90
Pau 9 1 11.1% −7.00
Vichy (FR) 4 0 0% −4.00
Marseille Borely 4 0 0% −4.00
Tarbes (FR) 3 1 33.3% +6.70

Class

ClassRWSR£1
Class 1 98 10 10.2% +57.80
Class 2 2 0 0% −2.00
Class 3 1 0 0% −1.00

Market position

In the bettingRWSRA/E£1
Favourite 41 16 39% 1.34 +68.35
2nd–3rd fav 109 15 13.8% 0.79 −34.30
4th–6th fav 151 11 7.3% 0.87 −30.00
7th+ in betting 147 8 5.4% 1.45 +11.40
Fair A/E per band is the tell: near 1.00 the market had it priced right; well above, the wins came where the market didn't expect them.

Rows below n=30 are shown faded — a small sample is a fact, not a trend. Every figure carries its N.

Horses trained

same window as header · most-raced first
HorseRWPlLast ran
O Trasno (FR) 14 1 6 15 Apr 24
Milano Blues (FR) 14 2 2 12 Aug 14
Zaal (FR) 13 2 4 14 May 13
Heidikly (FR)then F Vermeulen 13 3 6 2 Jan 12
Californiavitality (FR) 11 2 4 13 May 12
Penorka (FR) 10 2 5 27 Dec 15
Daidaidai (FR)then Gary Moore 10 0 0 25 May 14
Dulce Panem (FR)then Rebecca Menzies 9 0 2 5 May 17
Alkatara (FR) 9 0 3 2 May 15
Foresta (FR) 9 0 1 31 Dec 10
Montgaroult (FR) 8 0 0 30 Jun 19
Sirma Traou Land (FR)then R Le Gal 8 1 3 30 Apr 17
Showing the 60 most-raced of the 171 horses sent out in this window — each ran at least 3 times. Horses with fewer runs aren't listed; search finds any horse since 2005. Runs, wins and places only: a strike rate or a return on a handful of runs is noise, so none is quoted per horse — each horse's full record is on its own page.
Where they came from · where they went next

Of the 60 horses listed, 5 arrived from another yard in our archive; 55 had their first archived run for this yard.

25 have since run for another yard, most often for F Vermeulen (2) and Paul Nicholls (2); 35 have no later run for another yard in our archive.

Read from each listed horse's whole archived career (2005 onwards), not only this window, and counted over the horses listed above, not the whole string. “First archived run” means our archive holds nothing earlier, not that the horse was unraced. A horse with no later run elsewhere may still be here, be off the track, or have run somewhere our archive does not cover — none of that is asserted.

Current form

significance-gated

Last 14 days

Small sample
0 from 1
Only 1 runners in the last 14 days — too few to read against the baseline (gate: n≥15). The card states the sample and stays neutral.

When the yard fires

strike by month, lifetime
JFMAMJJASOND
14179512111812148179
A flat yard: the season runs Mar–Oct. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Jockey bookings

same window · biggest samples first
Go-to riderThierry Jarnet
13% of all rides
15.2% SR · A/E 1.67
RiderRWSR£1
Thierry Jarnet 66 10 15.2% +26.10
Jimmy Martin 40 7 17.5% +56.40
Francois-Xavier Bertras 32 5 15.6% +5.90
Muted rows are under 30 rides and sit behind "Show all".

Career highlights

lifetime archive, 2005→
63
Archived wins
10
Pattern / graded wins
£1.86m
Prize money
2011
Best season · 8 wins
In our archive from its very first year (2005), so this career almost certainly began earlier than our record does. The figures above count 2005 onwards only — what the archive holds, not a full-career total. This card is the full archive census (2005→); the statistics in the header aggregate from 2008 — the floor that guarantees every horse a complete captured career — so this card can legitimately show more wins than the header.
La Sardane (FR) — Prix de Sandringham (3yo Fillies) (Turf) Chantilly (FR) · Jun 2017 · Group 2
£63,333
Monette (FR) — Criterium du Bequet - Ventes Osarus () (2yo) (Turf) La Teste De Buch (FR) · Jul 2018 · Listed
£26,549
Zorken (FR) — Criterium de Vitesse () (2yo) (Straight Course) (Turf) Deauville (FR) · Oct 2023 · Listed
£26,549
Notable horses
Miss Julia Star (FR) Heidikly (FR) Yellow Ball (FR) Zorken (FR) Milano Blues (FR) Zaal (FR)

Sires in the string

progeny record · win % by ground and trip
Panis (USA) 10.3% · 3–29
Progeny have won 8.4% of 1,982 runs since 2008 (211 horses). Strongest on Heavy going: 12.2% from 147. Weakest over 2m1f – 2m4f (all codes): 4.3% from 116.
Goken (FR) 15.4% · 4–26
Progeny have won 9.6% of 2,123 runs since 2020 (249 horses). Strongest on Good going: 12.6% from 246. Strongest at trips under 6f (all codes): 15% from 200.
Milanais (FR) 4.8% · 1–21
Progeny have won 5% of 218 runs since 2015 (30 horses).
Air Chief Marshal (IRE) 10% · 2–20
Progeny have won 8.7% of 1,985 runs since 2014 (190 horses). Weakest on Standard (AW) going: 5.2% from 672. Strongest over 1m5f – 2m (all codes): 14.6% from 267. Weakest over 1m – 1m1f (all codes): 5.3% from 565.
American Post (GB) 20% · 3–15
Progeny have won 10.1% of 2,964 runs since 2008 (263 horses). Strongest on Good to Firm going: 13.9% from 108.
Anabaa Blue (GB) 14.3% · 2–14
Progeny have won 9.3% of 1,937 runs since 2008 (227 horses). Strongest on Good to Soft going: 12.6% from 278. Weakest on Standard (AW) going: 6% from 417.
Top line: the yard's own record with each sire's runners (win %, wins–runs), same window as the header; faded under 30 runs. Beneath it: every run by that sire's progeny in our archive since 2008, as at 12 Nov 2026 — what they have done, not a forecast. A going or a distance is named only where at least 100 progeny runs sit 3 or more points from the sire's own win rate. Distance bands cover Flat and jumps together.

The record

latest 50 of 519 · newest first

The latest 50 of 519 archived runners, newest first. The full record runs from 17 May 2005 to 11 November 2026.

DateCourseHorseRaceFinishSP
11 Nov 26 Toulouse (FR) Maka Des Granges (FR)J: Hugo Mouesan Prix Paulin Grefeuille8f · Soft · 11 ran 9th 40/1
29 Oct 26 Bordeaux Le Bouscat (FR) Deesse D'argent (FR)J: Guillaume Guedj-Gay Prix De PauillacClass 2 · 9.5f · Heavy · 9 ran 3rd 10/1
16 Oct 26 Toulouse (FR) El Diablo (FR)J: Marie Velon Prix De Laharie6f · Soft · 9 ran 9th 9/1
14 Oct 26 Saint-Cloud (FR) Deesse D'argent (FR)J: Eddy Hardouin Prix De La Fontaine8f · Good To Soft · 9 ran 6th 9/2
02 Oct 26 Dax (FR) Lupin D'oc (FR)J: Mme Mia Bars-Hugonot Prix Chateau De PoyanneClass 3 · 19f · Soft · 11 ran 3rd 12/1
23 Sep 26 Toulouse (FR) Aspic (FR)J: Jean-Bernard Eyquem Prix Du Bas Armagnac10.5f · Good · 15 ran 7th 7/4F
23 Sep 26 Toulouse (FR) El Diablo (FR)J: S Topin Prix Georges Sicard7f · Good · 10 ran 5th 14/1
16 Sep 26 Toulouse (FR) Deesse D'argent (FR)J: Guillaume Guedj-Gay Prix Des Violettes8f · Good To Soft · 10 ran 4th 16/1
05 Sep 26 La Teste De Buch (FR) El Diablo (FR)J: Delphine Santiago Prix Agri 338f · Good · 11 ran 8th 20/1
02 Sep 26 Toulouse (FR) Raqtaa (FR)J: Samy Le Quilleuc Prix Sergio Raffaello10f · Good · 15 ran 8th 11/1
26 Aug 26 La Teste De Buch (FR) Deesse D'argent (FR)J: Guillaume Guedj-Gay Prix Jonathan Besse8f · Soft · 12 ran 5th 16/1
23 Aug 26 Dax (FR) El Diablo (FR)J: Delphine Santiago Prix Charles & Eric Boulart7f · Very Soft · 12 ran 5th 7/1
19 Aug 26 La Teste De Buch (FR) Aspic (FR)J: Guillaume Guedj-Gay Poule D'ESSAI12.5%-TROPHEE Anglo Show-Px Century 21 Duprat & Associes11f · Good To Soft · 6 ran 1st 9/4F
17 Aug 26 Mont-De-Marsan (FR) Nouveau Jeu (FR)J: Clement Merille Prix Velox10.5f · Good To Soft · 11 ran 5th 7/1
17 Aug 26 Mont-De-Marsan (FR) Yaggera (FR)J: Mickael Forest Grand Prix De Mont-de-marsan (Prix Marcy)Class 1 · 10f · Good To Soft · 6 ran 4th 9/1
05 Aug 26 La Teste De Buch (FR) Deesse D'argent (FR)J: Delphine Santiago Prix Du President Jl Hiss-prix "Honneur Aux Pompiers Et Aux Benevoles"8f · Good · 11 ran 5th 28/1
05 Aug 26 La Teste De Buch (FR) Yaggera (FR)J: Delphine Santiago Prix Hotel Des Ventes Du Bassin D'arcachon (jg Larrieu)9f · Good · 7 ran 1st 5/2F
31 Jul 26 Dax (FR) Nouveau Jeu (FR)J: Delphine Santiago Prix Florestan Ii10.5f · Good · 11 ran 5th 25/1
31 Jul 26 Dax (FR) El Diablo (FR)J: Delphine Santiago Prix Bernard D'arexy6f · Good · 9 ran 3rd 16/1
17 Jul 26 Dax (FR) Yaggera (FR)J: Mickael Forest Prix Du Conseil Municipal De La Ville De DaxClass 2 · 10.5f · Good · 8 ran 4th 12/1

Drawn from the whole archive (2005 onwards), so it can include runs outside the window the header statistics cover. Non-runners are not listed. A finish shown in letters is a non-completion (F fell · UR unseated · PU pulled up · BD brought down).

Quick answers

What is B De Montzey's strike rate?
B De Montzey has won 57 of 501 runners since 2008, a strike rate of 11.4% (as at 12 November 2026). Figures are computed from our own results archive.
Which course does B De Montzey do best at?
Bordeaux Le Bouscat by strike rate: 6 wins from 36 runners (16.7%) since 2008. Read from the 15 courses with the most runners on the same basis, and only those with at least 30 — a small sample cannot top the list, and a rarely-visited course is not in the comparison.
Who rides most for B De Montzey?
Thierry Jarnet, with 66 runners since 2008 — 13% of the total. That pairing has won 10 (15.2%).
Is B De Montzey in form?
Too few runners in the last 14 days to read — 1 runner, which is not a sample we will draw a conclusion from.
What is B De Montzey's Fair A/E?
1.02, from 411 runners with a computed fair probability since 2008. Fair A/E compares actual wins with a margin-stripped market expectation, so 1.00 is par: above it the wins came at bigger prices than the margin-free market implied, below it they did not.
Fair A/E compares wins with a margin-stripped market expectation. Favourite-heavy samples — top yards, leading riders — naturally read a few points warm, so 1.05 means "beat the margin-free market read", not "the market underrates this by 5%". Three sample sizes are reported and never blended: runs (n), the ROI basis (n at SP), and the fair-A/E basis (n with a computed fair probability).

Strike rate is wins over all runs (n). ROI is £1 level stakes at SP over runs with a parseable price (n at SP). Fair A/E is wins over margin-stripped market expectation, over runs with a computed fair probability (n fair). The three Ns can legitimately differ and are always shown. Figures as at 12 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).