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Horse profile

Sonnyboyliston (IRE)

8yo gelding (at last run, Sep 2025) · Last trainer C Byrnes · Last owner Patrick M Oshea
by Power (GB) out of Miss Macnamara (IRE) (Dylan Thomas)
18 runs · 8 courses · from Aug 2019
As at 25 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 24 Sep 2025 — 395 days ago. Our archive can't say whether the horse is still in training.
Last run Sep 2025 · 3rd of 5 7 wins · 5 courses
KTB Profile

Sonnyboyliston won seven of 18 starts on turf, including the Group 1 Comer Group International Irish St. Leger at the Curragh in Sep 2021. Three of those wins came at Curragh and all seven wins were gained on good or softer ground, five of them on good. He also took a maiden hurdle at Listowel in May 2025. Aged 8 at his last run in Sep 2025, he finished third of five in a novice hurdle at Listowel.

Based on 18 archived runs · run-style from 4 commented runs since Oct 2024 · updated 25 Oct 2026
KTB at a glance OR ↓ 12lb off peak
Official rating103↓ 12lb off peak
103 68–115

KTB Speed and Rating

KTB Speed

Best recent Speed 104 the best of the last 3 graded (A or B) runs · Listowel, 31 May 2025

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 104B · median 92
GoingRunsBestMedianSince 25 Oct 2025
Soft1———
Good1———
DistanceRunsBestMedianSince 25 Oct 2025
1m5f – 2m2104B92—
Flat 16 figures · best 150A · median 89.5
GoingRunsBestMedianSince 25 Oct 2025
Soft8150A82.5—
Good5136A110—
Good to Soft2100A84—
Heavy1———
DistanceRunsBestMedianSince 25 Oct 2025
1m2f – 1m4f7150A90—
1m5f – 2m5113C100—
1m – 1m1f3116A73—
6f – 7f1———

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 18 figures from 18 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating (jumps) 136A the best of the last 2 rated runs · Listowel, 31 May 2025

Best recent KTB Rating (flat) 102A the best of the last 3 rated runs · Curragh, 12 Sep 2021 Official rating 103 at the last flat run, 26 Apr 2025

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 136A · median 133.5
GoingRunsBestMedianSince 25 Oct 2025
Soft1———
Good1———
DistanceRunsBestMedianSince 25 Oct 2025
1m5f – 2m2136A133.5—
Flat 16 figures · best 113A · median 93
GoingRunsBestMedianSince 25 Oct 2025
Soft897A80—
Good5113A102—
Good to Soft2101A97.5—
Heavy1———
DistanceRunsBestMedianSince 25 Oct 2025
1m2f – 1m4f7113A93—
1m5f – 2m5104A94—
1m – 1m1f397A78—
6f – 7f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 18 figures from 18 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 4 analysed runs since Oct 2024

  • Held up 3 (75%) · 0 wins
  • Prominent 1 (25%) · 1 win

Pedigree intelligence

Sire
Power (GB)

Progeny in our archive have won 9.4% of 2,723 runs since Jan 2008 (195 horses).

Strongest on good to firm going: 13.3% from 353. Weakest on heavy going: 6.2% from 161.

GoingRunsWinsSRvs sireThis horse
Firm12216.7%+7.3—
Good to Firm3534713.3%+3.9—
Good5725710%+0.65 from 6
Good to Soft315247.6%−1.81 from 2
Soft423307.1%−2.31 from 9
Heavy161106.2%−3.20 from 1
Standard (AW)887879.8%+0.4—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f2833111%+1.6—
6f – 7f1,0581019.5%+0.10 from 1
1m – 1m1f600559.2%−0.21 from 3
1m2f – 1m4f353339.3%−0.13 from 7
1m5f – 2m258238.9%−0.53 from 7
2m1f – 2m4f9777.2%−2.2—
2m5f – 3m54611.1%+1.7—
Over 3m2015%−4.4—

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
Miss Macnamara (IRE) (Dylan Thomas)

5 siblings in the archive, 4 winners — best of them Lot of Joy (IRE) (4 wins).

The wins came over 1m4f–2m2f; the highest grade won is Listed (Lot of Joy (IRE)).

Family form: Magnum Cor (IRE) won at Bellewstown (IRE), 1 Oct 2026.

ProduceRunsWinsWin tripsBest grade
Lot of Joy (IRE)2242m–2m2fListed
Magnum Cor (IRE)321m4f–1m4½f—
Lord Churchill (IRE)111m7fClass 5
Dubeyeracingcraic (IRE)712m2f—
Eagle Of Destiny (IRE)20——

Record by conditions

GoingRunsWinsSR£1
Soft 9 1 11% −4.67
Good 6 5 83% +18.87
Good to Soft 2 1 50% +0.62
Heavy 1 0 0% −1.00

ClassRunsWinsSR£1
Class 1 2 0 0% −2.00
Class 2 1 1 100% +10.00

CourseRunsWinsSR£1
Curragh 7 3 43% +5.62
Navan 3 0 0% −3.00
Listowel 2 1 50% −0.33
York 2 1 50% +9.00
Limerick 1 1 100% +1.20
Chester 1 0 0% −1.00
Naas 1 0 0% −1.00
Gowran Park 1 1 100% +3.33

DistanceRunsWinsSR£1
1m5f – 2m 7 3 43% +10.67
1m2f – 1m4f 7 3 43% +2.82
1m – 1m1f 3 1 33% +1.33
6f – 7f 1 0 0% −1.00

JockeyRunsWinsSR£1
Ben Coen 8 4 50% +14.95
Seamie Heffernan 3 0 0% −3.00
Philip Byrnes 2 1 50% −0.33
Mr R W Barron 1 0 0% −1.00
Ronan Whelan 1 0 0% −1.00
Shane B Kelly 1 1 100% +1.20
W J Lee 1 1 100% +4.00
N G McCullagh 1 0 0% −1.00

HeadgearRunsWinsSR£1
None 14 4 29% −3.18
Cheekpieces 4 3 75% +17.00

SeasonRunsWinsSR£1
2025 3 1 33% −1.33
2024 1 0 0% −1.00
2021 6 3 50% +12.20
2020 5 3 60% +6.95
2019 3 0 0% −3.00

TypeRunsWinsSR£1
Flat 16 6 38% +14.15
Hurdle 2 1 50% −0.33

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
2025 · 3 runs
24 Sep 25+116d Listowel Seamus Mulvaney Bookmaker Novice Hurdle 16f · Yielding · 5 ran Settled towards the back early - stumbled at the 4th - urged forward turning into the straight - shared 3rd spot two out - moved into 2nd approaching the last - unable to challenge the winner after that - stayed on at one speed to finish 3rd 3/5 nk 11-7 —80C131B Philip Byrnes 14/1
31 May 25+35d Listowel Join The Listowel Races Supporters Club Maiden Hurdle 16.5f · Good · 13 ran Handy early - moved into contention after 4th and up to 3rd after 5th - advanced into 2nd turning for home - narrowed gap 2 out - jumped awkwardly at the last - kept on to hit front near the finish 1/13 11-12 —104B136A Philip Byrnes 4/6F
26 Apr 25+186d Navan Bar One Racing Vintage Crop Stakes (Listed) 14f · Soft · 6 ran Held up in 5th - driven to chase the pace with 2f left but made no headway - unable to find more inside final furlong - finished sixth well held 6/6 4¾ 9-5 10376A78B Seamie Heffernan 40/1
2024 · 1 run
22 Oct 24+1136d Curragh Al Basti Equiworld Dubai Amateur Riders Derby (Q.R.) Race 12f · Yielding · 11 ran Held up towards the back - asked for effort in 7th two out but made no headway - stayed on same gear to finish sixth 6/11 1¾ 11-2 11574A79A Mr R W Barron 16/1
2021 · 6 runs
12 Sep 21+22d Curragh Comer Group International Irish St. Leger (Group 1) 14f · Good · 13 ran 1/13 9-11 113113C102A Ben Coen 4/1
21 Aug 21+42d York Sky Bet Ebor Handicap (Heritage Handicap) Class 2 · 14f · Good · 20 ran 1/20 9-8 108110C104A Ben Coen 10/1
10 Jul 21+22d York John Smith's Silver Cup Stakes (Group 3) Class 1 · 14f · Good · 10 ran 6/10 hd 9-0 10987A93A Ronan Whelan 11/2
18 Jun 21+43d Limerick Martin Molony Stakes (Listed) 12.5f · Good · 9 ran 1/9 9-9 109136A98A Shane B Kelly 6/5F
06 May 21+39d Chester tote+ Pays You More At tote.co.uk Ormonde Stakes (Group 3) Class 1 · 13.5f · Good To Soft · 8 ran 3/8 3½ 9-0 109100A94A Ben Coen 9/1
28 Mar 21+168d Naas Plusvital Devoy Stakes (Listed) 10f · Soft · 12 ran 3/12 6 9-7 110150A93A Ben Coen 11/1
2020 · 5 runs
11 Oct 20+28d Curragh Novi IT Services International Stakes (Group 3) 10f · Soft · 9 ran 4/9 7½ 9-5 11269C81C Ben Coen 5/2
13 Sep 20+57d Curragh Irish Stallion Farms EBF 'Northfields' Handicap (Premier Handicap) 10f · Good · 22 ran 1/22 9-2 9990C113A W J Lee 4/1
18 Jul 20+15d Curragh Sentinel Ireland Equine Products Handicap 10f · Good To Yielding · 11 ran 1/11 9-7 8668A101A Ben Coen 13/8F
03 Jul 20+14d Navan Royal County Handicap (Premier Handicap) 10f · Yielding · 9 ran 3/9 2¼ 9-1 84103A85A Ben Coen 7/2
19 Jun 20+254d Gowran Park It's Not Rocket Science With MansionBet Handicap (50-75) 8f · Yielding · 11 ran 1/11 9-4 68116A97A Ben Coen 10/3
2019 · 3 runs
09 Oct 19+10d Navan Welcome To Navan Racecourse Maiden (Plus 10) 8f · Soft · 17 ran 12/17 8 9-5 —17C51C N G McCullagh 16/1
29 Sep 19+44d Curragh Irish Stallion Farms EBF Median Auction Maiden (Plus 10) 8f · Heavy · 23 ran 11/23 nk 9-5 —73C78A Seamie Heffernan 10/1
16 Aug 19 Curragh Irish Stallion Farms EBF Median Auction Maiden (Plus 10) 7f · Soft · 29 ran 6/29 3¼ 9-5 —89C72A Seamie Heffernan 25/1

Quick answers

How many races has Sonnyboyliston won?
Sonnyboyliston (IRE) won 7 of 18 archived starts between 2019 and 2025, a strike rate of 38.9%. Placed 10 times in total (55.6% of starts).
Who trained Sonnyboyliston?
Sonnyboyliston (IRE) was trained by C Byrnes on the most recent run on record, at Listowel on 24 September 2025.
Who is Sonnyboyliston's sire?
Sonnyboyliston (IRE) is by Power (GB) out of Miss Macnamara (IRE), whose sire is Dylan Thomas.
What going does Sonnyboyliston prefer?
Sonnyboyliston (IRE) has the best record on good going: 5 wins from 6 starts (83.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is Sonnyboyliston's official rating?
Sonnyboyliston (IRE)'s highest official rating on record is 115.
What is Sonnyboyliston's sire's record?
Power (GB)'s progeny in our archive have won 9.4% of 2,723 runs since Jan 2008 (195 horses), Flat and jumps together. Strongest on good to firm going: 13.3% from 353. Weakest on heavy going: 6.2% from 161.
Who are Sonnyboyliston's siblings?
Out of Miss Macnamara (IRE), Sonnyboyliston (IRE) has 5 other produce in our archive, 4 of them winners. Most wins: Lot of Joy (IRE) (4). Highest grade won: Listed (Lot of Joy (IRE)). The wins came over 1m4f–2m2f. As at Oct 2026.

Record shown from August 2019. 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.