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Trainer profile

William Coleman O'Brien

229 runners in the lifetime window · 25 individual horses
As at 10 Nov 2026 · KTB archive: 2005–present, updated daily
Last runner 102 days ago
Last 5 seasons Lifetime (2008→)
from 1 Jan 2008 — the aggregate floor: every horse in the window has a complete captured career behind it
8–229
Wins / Runs
3.5%
Strike rate
n=229
33 (14%)
Placed
0.93
Fair A/E
n=229 · 0.71 incl. margin
−139.50
£1 level stake
n=229 at SP · −60.9%
£87,524
Prize money (window)
Strike by season
0%
KTB Yard Profile

Sends out around 10 runners a season, across both codes, winning with 4% of them — a touch below the margin-free market read across the lifetime window (Fair A/E 0.93).

Deterministic profile computed from 229 archived runs (lifetime window) · updated 10 Nov 2026
KTB at a glance Pierce Gallagher: 1.4% from 74 Claiming riders: 3.6%
The read

It is weakest at Cork (0% over 30 runners) — the widest gap in the record. Pierce Gallagher rides 32% of the entries and sits below the yard's average (1.4% vs 3.5%, A/E 0.39). The yard also reads well off a 15-30-day break (7.9%, n=63) and over 2m5f – 3m (8.1%, n=37). The record reads poorly over 6f – 7f — 0% over 37 runners, 3.5pts below the baseline.

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

Yard patterns

the angles behind the record · vs 3.5% baseline
Fresh · 61+ days off
1.4%−2.1
n=71 · A/E 0.46 · £1 −50.00
New recruits · first run for the yard
0%−3.5
n=5 · A/E 0.00 · £1 −5.00
Debutants · first career start
0%−3.5
n=17 · A/E 0.00 · £1 −17.00
First-time headgear · true-first definition
0%−3.5
n=8 · A/E 0.00 · £1 −8.00
Headgear returns · back on after a bare run
0%−3.5
n=5 · A/E 0.00 · £1 −5.00
When favourite
0%
n=1 · A/E 0.00 · £1 −1.00
Claiming riders · a claimer in the saddle
3.6%+0.1
n=166 · A/E 1.04 · £1 −99.00
Group / Graded races · pattern & listed
0%−3.5
n=5 · A/E 0.00 · £1 −5.00

Each tile is the record in that situation vs the 3.5% 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 15-30-day break 7.9% vs 3.5% · n=63
Over 2m5f – 3m 8.1% vs 3.5% · n=37
Over 6f – 7f 0% vs 3.5% · n=37
Off a break of 180+ days 0% vs 3.5% · n=31
At Cork 0% vs 3.5% · n=30
With Pierce Gallagher 1.4% vs 3.5% · n=74
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
Hurdle 103 4 3.9% −46.00
Flat 101 3 3% −77.50
Chase 14 1 7.1% −5.00
NH Flat 11 0 0% −11.00

Going

GoingRWSR£1
Soft 81 4 4.9% −22.50
Heavy 51 2 3.9% −38.00
Good 42 1 2.4% −33.00
Good to Firm 20 0 0% −20.00
Good to Soft 20 1 5% −11.00
Standard (AW) 13 0 0% −13.00
Firm 2 0 0% −2.00

Courses

CourseRWSR£1
Limerick 36 1 2.8% −27.00
Cork 30 0 0% −30.00
Galway 16 1 6.3% −9.00
Dundalk (AW) 12 0 0% −12.00
Tramore 12 1 8.3% +9.00
Curragh 11 0 0% −11.00
Killarney 10 0 0% −10.00
Fairyhouse 10 0 0% −10.00
Listowel 9 0 0% −9.00
Thurles 9 1 11.1% +6.00
Gowran Park 8 0 0% −8.00
Leopardstown 8 0 0% −8.00
Wexford 8 0 0% −8.00
Tipperary 7 0 0% −7.00
Ballinrobe 7 1 14.3% +8.00

Class

ClassRWSR£1
Class 1 5 0 0% −5.00
Class 4 1 0 0% −1.00

Market position

In the bettingRWSRA/E£1
Favourite 2 0 0% 0.00 −2.00
2nd–3rd fav 15 2 13.3% 1.18 −0.50
4th–6th fav 41 3 7.3% 1.34 −17.00
7th+ in betting 171 3 1.8% 0.71 −120.00
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
Mctaggart (IRE) 39 2 7 18 Oct 18
Porto Calero (GB)from K J Condon 24 1 5 14 Aug 10
No Memory (IRE) 22 3 6 2 Oct 25
Antigua Son (IRE) 21 0 3 25 Oct 21
Capal Dubh Alainn (IRE)from Tim Pitt 17 1 4 7 Mar 15
Kilmagner (IRE) 17 0 0 1 Jun 11
Charmingandpretty (IRE) 11 0 0 4 Aug 15
The Next Hall (IRE) 11 0 1 18 May 10
Rathkenny (IRE) 10 0 0 17 Jul 09
Cymau Lass (IRE) 9 0 1 27 May 11
The Last Armada (IRE) 8 0 3 11 May 19
Princess Etain (IRE) 4 0 0 3 Oct 16
All 25 horses sent out in this window. 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 25 horses listed, 6 arrived from another yard in our archive; 19 had their first archived run for this yard.

2 have since run for another yard; 23 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.

When the yard fires

strike by month, lifetime
JFMAMJJASOND
1705004080800
Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Jockey bookings

same window · biggest samples first
Go-to riderPierce Gallagher
32% of all rides
1.4% SR · A/E 0.39
RiderRWSR£1
Pierce Gallagher 74 1 1.4% −53.00
Muted rows are under 30 rides and sit behind "Show all".

Career highlights

lifetime archive, 2005→
14
Archived wins
£205k
Prize money
2006
Best season · 4 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.
Heronstown (IRE) — Visit The Panoramic Restaurant Handicap Hurdle (81-130) Punchestown · Oct 2005
£12,093
Chetwind Music (IRE) — Scafhire Beginners Chase Navan · Jan 2006
£9,674
Rathkenny (IRE) — Ladbrokes.ie H'cap Hurdle (74-116) Limerick · May 2006
£9,329
Notable horses
No Memory (IRE) Mctaggart (IRE) Rathkenny (IRE) Porto Calero (GB) Heronstown (IRE) Sparkle Wood (IRE)

Sires in the string

progeny record · win % by ground and trip
Westerner (GB) 6.9% · 5–72
Progeny have won 12.2% of 11,867 runs since 2009 (945 horses). Weakest on Standard (AW) going: 8.5% from 188.
Tobougg (IRE) 4.2% · 1–24
Progeny have won 8.5% of 6,096 runs since 2008 (464 horses).
Dubai Destination (USA) 0% · 0–21
Progeny have won 11% of 6,951 runs since 2008 (521 horses). Strongest at trips under 6f (all codes): 16.9% from 136.
Kalanisi (IRE) 5.9% · 1–17
Progeny have won 10.5% of 6,752 runs since 2008 (648 horses). Strongest on Good to Firm going: 16.1% from 355.
Night Shift (USA) 0% · 0–17
Progeny have won 8.7% of 2,176 runs since 2008 (140 horses).
Supreme Leader (GB) 0% · 0–13
Progeny have won 9.2% of 2,984 runs since 2008 (349 horses).
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 10 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 394 · newest first

The latest 50 of 394 archived runners, newest first. The full record runs from 13 January 2005 to 31 July 2026.

DateCourseHorseRaceFinishSP
31 Jul 26 Galway (IRE) Study Of Motion (IRE)J: Darragh O'Sullivan Guinness Irish EBF Fillies Maiden12f · Yielding To Soft · 16 ran 15th 150/1
19 Apr 26 Tramore Cerberus (GB)J: James Smith SETU Students Day April 20th Handicap Chase (0-100)15.5f · Yielding · 10 ran 6th 10/1
19 Mar 26 Cork Cerberus (GB)J: James Smith William Hill Each Way Extra Challenge Series Handicap Hurdle (0-100)17f · Yielding · 22 ran 4th 22/1
02 Oct 25 Bellewstown No Memory (IRE)J: Yudish Geerdharry SIS Supporting Irish Racing Handicap (0-60) (Div 1)12.5f · Soft · 13 ran 12th 28/1
13 Jun 25 Fairyhouse No Memory (IRE)J: Yudish Geerdharry Kate O'Sullivan Handicap (0-60)12f · Good To Yielding · 18 ran 11th 40/1
19 Apr 25 Cork No Memory (IRE)J: Darragh O'Sullivan Racing Again Tomorrow Handicap (0-60)12f · Soft · 10 ran 6th 22/1
23 Feb 22 Punchestown No Memory (IRE)J: Ambrose McCurtin Watch On Racing TV Quevega Mares Hurdle (Grade 3)20.5f · Soft To Heavy · 5 ran 4th 50/1
14 Nov 21 Punchestown No Memory (IRE)J: Ambrose McCurtin Frontline Security Grabel Mares Hurdle (Listed)18f · Good To Yielding · 8 ran 7th 22/1
25 Oct 21 Galway Antigua Son (IRE)J: Nathan Crosse Galway Races Summer Festival 2022 Handicap (45-65) (Div 2)12f · Heavy · 18 ran 17th 66/1
25 Oct 21 Galway No Memory (IRE)J: Nathan Crosse Galway Races Summer Festival 2022 Handicap (45-65) (Div 1)12f · Heavy · 17 ran 1st 6/1
10 Oct 21 Limerick No Memory (IRE)J: Ambrose McCurtin Irish Stallion Farms EBF Cailin Alainn Mares Hurdle (Listed)22.5f · Soft · 9 ran 2nd 20/1
19 Sep 21 Listowel No Memory (IRE)J: Ambrose McCurtin Irish Stallion Farms EBF Mares Hurdle20f · Good To Yielding · 9 ran 3rd 100/1
21 Aug 21 Killarney Antigua Son (IRE)J: Ambrose McCurtin Adare Manor Opportunity Handicap Hurdle (80-95) (Div 1)20f · Good · 17 ran 7th 20/1
01 Aug 21 Galway Antigua Son (IRE)J: Nathan Crosse JPK Fencing Systems Race14f · Good · 6 ran 6th 300/1
01 Aug 21 Galway No Memory (IRE)J: Mark Enright JPK Fencing Systems Race14f · Good · 6 ran 5th 125/1
21 Jun 21 Ballinrobe No Memory (IRE)J: Nathan Crosse Paddy Smyth Memorial Apprentice Maiden13f · Good · 9 ran 6th 25/1
06 Jun 21 Listowel (IRE) Antigua Son (IRE)J: Mr S J P Baragry St. Johns Theatre Listowel (Q.R.) Race13f · Good To Yielding · 13 ran 11th 125/1
06 Jun 21 Listowel (IRE) No Memory (IRE)J: Miss S Ahern St. Johns Theatre Listowel (Q.R.) Race13f · Good To Yielding · 13 ran 8th 100/1
24 May 21 Ballinrobe No Memory (IRE)J: Rachael Blackmore Monroe's Live John Monroe Memorial Mares Handicap Hurdle18f · Heavy · 6 ran 4th 10/3J
21 May 21 Wexford Antigua Son (IRE)J: Rachael Blackmore Jim Ryan Racecourse Services Handicap Hurdle (80-95) (Div 1)17f · Heavy · 7 ran 2nd 11/4F

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 William Coleman O'Brien's strike rate?
William Coleman O'Brien has won 8 of 229 runners since 2008, a strike rate of 3.5% (as at 10 November 2026). Figures are computed from our own results archive.
Which course does William Coleman O'Brien do best at?
Limerick by strike rate: 1 wins from 36 runners (2.8%) 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 William Coleman O'Brien?
Pierce Gallagher, with 74 runners since 2008 — 32% of the total. That pairing has won 1 (1.4%).
What is William Coleman O'Brien's Fair A/E?
0.93, from 229 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 10 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).