HORSE PROFILE

Understudy (GB) Horse Profile: Record, Form and Odds

ch filly · by Sea The Stars (IRE) out of Sequester (GB)

Understudy’s best going, distance and course

Distance1m 4f · 1 win, 1 placed from 6
GoingStandard · 1 win, 1 placed from 2
CourseSouthwell (AW) · 1 win from 1

Understudy is at her best over a mile and a half on good ground or quicker: she has won one of her five runs on good or firmer. Three runs at Newmarket have yet to produce a place.

Understudy’s latest run

Last time out, Understudy finished sixth of eight in the Gp Des Provinces-Px Andre Baboin-13e Etape Defi Du GALOP-G.CAMPRUBI at Lyon Parilly (FR) on 26 September 2026, beaten 3½ lengths by Le Combat Continue. She started at 4/1 over 1m4f on soft ground under Hugo Boutin. She has no race declared for today or tomorrow.

Understudy’s official rating

Her official rating is 100. She started 2026 on 100, rose to a peak of 102 and has been dropped 2lb since.

Understudy’s pedigree: what the Sea The Stars stock does

Understudy is by Sea The Stars out of Sequester, a Selkirk mare. In Britain over the last 12 months, Sea The Stars’s runners have won 115 times from 675 starts, a 17% strike rate. Their most successful distance is Understudy’s trip of a mile and a half, where they have won 24 of 103 starts (23%).

Understudy career record

11
Runs
1
Wins
9%
Win %
4
Placed
36%
Place %
£89,391
Earnings
Recent form 54622756 most recent on right

Understudy: peak ratings achieved

102
Peak OR
1
Best finish

OR = Official Rating · RPR = Racing Post Rating · TS = Topspeed

Understudy form by course, going and distance

By course

course Runs Wins Placed Win %
Newmarket 3 0 0 0%
Clairefontaine (FR) 2 0 1 0%
Lyon Parilly (FR) 1 0 0 0%
Longchamp (FR) 1 0 0 0%
Lingfield (AW) 1 0 1 0%
Deauville (FR) 1 0 0 0%

By going

going Runs Wins Placed Win %
Good To Soft 4 0 1 0%
Standard 2 1 2 50%
Good To Firm 2 0 1 0%
Soft 1 0 0 0%
Very Soft 1 0 0 0%
Good 1 0 0 0%

By distance

distance Runs Wins Placed Win %
1m3f–1m4f 6 1 2 17%
1m5f–1m6f 3 0 1 0%
2m 1 0 1 0%
1m1f–1m2f 1 0 0 0%

Understudy race history and results

6
26 Sep 2026
Lyon Parilly (FR) — Gp Des Provinces-Px Andre Baboin-13e Etape Defi Du GALOP-G.CAMPRUBI
1m4f · Soft · Class 1 · Hugo Boutin
4/1
SP
5
3 Sep 2026
Longchamp (FR) — Prix Joubert
1m6f · Very Soft · Class 1 · Mickael Barzalona
9/1
SP
7
1 Aug 2026
Clairefontaine (FR) — Caen Tattoo Festival - Prix Luth Enchantee
1m4f · Good To Soft · Class 1 · Clement Lecoeuvre
15/8F
SP
2
11 Jul 2026
Clairefontaine (FR) — Prix Perrault Stakes
1m6f91y · Good To Soft · 2 · Mme Marie Velon
11/8F
SP
2
20 Nov 2025
Lingfield (AW) — BetMGM River Eden EBF Fillies' Stakes (Listed) (GBBPlus Race)
1m5f · Standard · Class 1 · Robert Havlin
3/1
SP
6
26 Sep 2025
Newmarket — Princess Royal Stakes (Sponsored By Boyle Sports) (Fillies' & Mares' Group 3)
1m4f · Good To Firm · Class 1 · Oisin Murphy
10/1
SP
4
17 Aug 2025
Deauville (FR) — The Aga Khan Studs Prix Lady O'Reilly (3yo Fillies) (Round Course) (Turf)
1m4½f · Good To Soft · Oisin Murphy
17/5
SP
5
19 Jul 2025
Newmarket — Ric And Mary Hambro Aphrodite Fillies' Stakes (Fillies' & Mares' Listed) (GBBPlus Race)
1m4f · Good To Soft · Class 1 · Oisin Murphy
4/1
SP
2
19 Jun 2025
Ascot — Ribblesdale Stakes (Fillies' Group 2)
1m3f211y · Good To Firm · Class 1 · Robert Havlin
40/1
SP
1
31 May 2025
Southwell (AW) — Sky Sports Racing Sky 415 Fillies' Novice Stakes
1m4f14y · Standard · Class 5 · Tyler Heard
5/4F
SP
4
2 May 2025
Newmarket — Darley EBF Maiden Fillies' Stakes (GBB/GBBPlus Race)
1m2f · Good · Class 2 · Oisin Murphy
13/2
SP

Understudy breeding and pedigree

Date of birth
20 Feb 2022
Sire
Sea The Stars (IRE)
Dam
Sequester (GB)
Damsire
Selkirk (USA)
Breeder
Bjorn Nielsen

Understudy FAQs

How many races has Understudy won?

One of her last 11 starts.

What is Understudy’s best distance?

A mile and a half: her only win came over 1m 4f, from six runs at the trip.

Who is Understudy’s sire?

Sea The Stars. Her dam is Sequester, by Selkirk.

When does Understudy run next?

She has no race declared for today or tomorrow. Her next run will appear on this page as soon as she is declared.

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