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Horse profile

Thaisa (GB)

3yo filly (at last run, Oct 2025) · Last trainer Andrew Balding · Last owner Mrs F Denniff
by Invincible Spirit (IRE) out of Tiana (GB) (Diktat)
5 runs · 3 courses · from Nov 2024
As at 25 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 13 Oct 2025 — 376 days ago. Our archive can't say whether the horse is still in training.
Last run Oct 2025 · 2nd of 7 Last raced off OR 74
KTB Profile

Thaisa is a maiden who has two places from five starts. She finished second of seven in a Class 5 maiden fillies stakes at Kempton (AW) in Oct 2025, her best effort to date and off an official rating of 74. The filly, by Invincible Spirit out of a Diktat mare, has raced four times on the all-weather and once on turf. She was aged 3 at her last run in Oct 2025.

Based on 5 archived runs · run-style from 4 commented runs since Nov 2024 · updated 25 Oct 2026

KTB Speed and Rating

KTB Speed

Best recent Speed 90 the best of the last 3 graded (A or B) runs · Kempton (AW), 13 Oct 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 →

Flat 5 figures · best 90A · median 71
GoingRunsBestMedianSince 25 Oct 2025
Standard (AW)490A75—
Good to Firm1———
DistanceRunsBestMedianSince 25 Oct 2025
6f – 7f490A75.5—
1m – 1m1f1———

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 77A the best of the last 3 rated runs · Kempton (AW), 13 Oct 2025 Official rating 74 at the last run, 13 Oct 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 →

Flat 5 figures · best 77A · median 74
GoingRunsBestMedianSince 25 Oct 2025
Standard (AW)477A74—
Good to Firm1———
DistanceRunsBestMedianSince 25 Oct 2025
6f – 7f477A75—
1m – 1m1f1———

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 4 analysed runs since Nov 2024

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

Pedigree intelligence

Sire
Invincible Spirit (IRE)

Progeny in our archive have won 11.9% of 20,829 runs since Jan 2008 (1,573 horses).

Strongest on firm going: 16.1% from 161. Weakest over 1m5f – 2m (all codes): 7.8% from 843.

GoingRunsWinsSRvs sireThis horse
Firm1612616.1%+4.2—
Good to Firm3,58146312.9%+10 from 1
Good4,53048710.8%−1.1—
Good to Soft2,13225411.9%0—
Soft2,76130311%−0.9—
Heavy793779.7%−2.2—
Standard (AW)6,87086612.6%+0.70 from 4
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f3,05239913.1%+1.2—
6f – 7f9,8351,17912%+0.10 from 4
1m – 1m1f4,50354212%+0.10 from 1
1m2f – 1m4f2,13924911.6%−0.3—
1m5f – 2m843667.8%−4.1—
2m1f – 2m4f361339.1%−2.8—
2m5f – 3m8989%−2.9—
Over 3m7114.3%+2.4—

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
Tiana (GB) (Diktat)

7 siblings in the archive, 7 winners — best of them Beat The Bank (GB) (9 wins).

The wins came over 5f–1m; the highest grade won is Group 2 (Beat The Bank (GB)).

ProduceRunsWinsWin tripsBest grade
Beat The Bank (GB)1797f–1mGroup 2
Chil Chil (GB)2466fGroup 3
Salt Island (GB)826fClass 2
Auria (GB)1121mListed
Royal Warrior (GB)1425f–6fClass 5
Break The Bank (GB)1411mClass 4
Polly's Rose (GB)517fClass 5

Record by conditions

GoingRunsWinsSR£1
Standard (AW) 4 0 0% −4.00
Good to Firm 1 0 0% −1.00

ClassRunsWinsSR£1
Class 5 4 0 0% −4.00
Class 4 1 0 0% −1.00

CourseRunsWinsSR£1
Kempton (AW) 3 0 0% −3.00
Newcastle (AW) 1 0 0% −1.00
Haydock 1 0 0% −1.00

DistanceRunsWinsSR£1
6f – 7f 4 0 0% −4.00
1m – 1m1f 1 0 0% −1.00

JockeyRunsWinsSR£1
Oisin Murphy 2 0 0% −2.00
David Probert 2 0 0% −2.00
P J McDonald 1 0 0% −1.00

HeadgearRunsWinsSR£1
Hood 3 0 0% −3.00
None 2 0 0% −2.00

SeasonRunsWinsSR£1
2025 3 0 0% −3.00
2024 2 0 0% −2.00

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
2025 · 3 runs
13 Oct 25+24d Kempton (AW) Unibet 3 Uniboosts A Day Maiden Fillies' Stakes (GBB Race) Class 5 · 7f · Standard To Slow · 7 ran Fought the bridle early - tracked the front group - asked for effort over 2f out then eased right a furlong out - stayed on at one gear to finish second 2/7 1¼ 9-2 7490A77A Oisin Murphy 6/4
19 Sep 25+120d Newcastle (AW) Border Minstrel Maiden Stakes (GBB Race) Class 5 · 7f · Standard · 6 ran Reluctant to enter stalls - checked leaving gate - dropped to last - made limited late progress up the rail to finish 4th 4/6 3¼ 9-2 7564A67B P J McDonald 11/4
22 May 25+169d Haydock Betfred 'Play Fred's 5 Million' Fillies' Novice Stakes (GBB Race) Class 4 · 7f · Good To Firm · 6 ran Took a strong hold early - sat handy on the inner just behind the pace - drifted left from two furlongs out - pushed along with a furlong to run - squeezed for space late but kept going to the line 3/6 ¾ 9-2 —71A76B David Probert 9/1
2024 · 2 runs
04 Dec 24+28d Kempton (AW) Unibet Zero% Mission EBF Fillies' Novice Stakes (GBB Race) Class 5 · 7f · Standard To Slow · 14 ran Sprang alert from the stalls - raced handy in the early stages - holding a fair position 2f out - pressed for effort soon after - weakened approaching the final furlong to finish 8th 8/14 ¾ 9-2 —80B74A Oisin Murphy 11/8F
06 Nov 24 Kempton (AW) Unibet Zero% Mission Maiden Fillies' Stakes (GBB Race) (Div 2) Class 5 · 8f · Standard To Slow · 12 ran Settled at the back early - pushed along with 2f left - progress inside final furlong - finished full of running to go down by a half-length 3/12 nk 9-2 —70A74A David Probert 11/1

Quick answers

How many races has Thaisa won?
Thaisa (GB) has yet to win, from 5 archived starts between 2024 and 2025. Placed 2 times in total (40% of starts).
Who trained Thaisa?
Thaisa (GB) was trained by Andrew Balding on the most recent run on record, at Kempton (AW) on 13 October 2025.
Who is Thaisa's sire?
Thaisa (GB) is by Invincible Spirit (IRE) out of Tiana (GB), whose sire is Diktat.
What is Thaisa's official rating?
The most recent official rating on record is 74, from the run on 13 October 2025. The highest on record is 75.
What is Thaisa's sire's record?
Invincible Spirit (IRE)'s progeny in our archive have won 11.9% of 20,829 runs since Jan 2008 (1,573 horses), Flat and jumps together. Strongest on firm going: 16.1% from 161. Weakest over 1m5f – 2m (all codes): 7.8% from 843.
Who are Thaisa's siblings?
Out of Tiana (GB), Thaisa (GB) has 7 other produce in our archive, 7 of them winners. Most wins: Beat The Bank (GB) (9). Highest grade won: Group 2 (Beat The Bank (GB)). The wins came over 5f–1m. As at Oct 2026.

Record shown from November 2024. 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.