Horse profile
Atomic Mass (IRE)
23 runs · 11 courses · from May 2024
As at 18 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
Won at Wetherby
Off 255 days · 4th of 8
Last raced off OR 56
KTB Profile
Atomic Mass is 1 from 23 with the win at Class 6 level in a handicap at Wetherby over under 6f on good to firm in Jun 2025. The gelding has not won since. All three subsequent starts on all-weather came without a placing. He finished fourth of eight when he last ran at Newcastle in Feb 2026.
Based on 23 archived runs · run-style from 13 commented runs · updated 18 Oct 2026
KTB at a glance
Won on turf, 0 on AW
Wins on good or faster
Win at Class 6
OR ↓ 12lb off peak
- 1–23Wins / Runs
- 4.3%Strike rate
- 5 (21.7%)Placed
- −19.50£1 level staken=23 at SP
- 0.39Fair A/E n=23 · 0.32 incl. margin
- 68Highest OR
- 28dAvg between runs
A/E compares actual wins with what starting prices implied. "Fair" strips the bookmaker margin from the expectation, so favourites and longshots are judged on the same footing — figures near 1.00 mean the market priced this horse about right.
Official rating56↓ 12lb off peak
56
56–68
KTB Speed and Rating
KTB Speed
Best recent Speed 106
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
| Going | Runs | Best | Median | Since 18 Oct 2025 |
|---|---|---|---|---|
| Standard (AW) | 10 | 106A | 89 | 6 · 106 / 85.5 |
| Good to Firm | 7 | 103A | 86 | — |
| Good to Soft | 6 | 72A | 62 | — |
| Distance | Runs | Best | Median | Since 18 Oct 2025 |
|---|---|---|---|---|
| 6f – 7f | 18 | 106A | 78.5 | 6 · 106 / 85.5 |
| Under 6f | 4 | 103A | 78 | — |
| 1m – 1m1f | 1 | — | — | — |
KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 23 figures from 23 runs · as at 3 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 13 analysed runs
- Held up 6 (46%) · 1 win
- Midfield 4 (31%) · 0 wins
- Prominent 3 (23%) · 0 wins
Pedigree intelligence
Sire
Progeny in our archive have won 9.5% of 5,048 runs since Jan 2008 (402 horses).
Weakest on heavy going: 4.3% from 115. Strongest at trips under 6f (all codes): 13% from 522. Weakest over 1m5f – 2m (all codes): 6.2% from 177.
| Going | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Firm | 24 | 4 | 16.7% | +7.2 | — |
| Good to Firm | 955 | 100 | 10.5% | +1 | 1 from 7 |
| Good | 986 | 100 | 10.1% | +0.6 | — |
| Good to Soft | 469 | 28 | 6% | −3.5 | 0 from 6 |
| Soft | 426 | 28 | 6.6% | −2.9 | — |
| Heavy | 115 | 5 | 4.3% | −5.2 | — |
| Standard (AW) | 2,072 | 217 | 10.5% | +1 | 0 from 10 |
| Distance (all codes) | Runs | Wins | SR | vs sire | This horse |
|---|---|---|---|---|---|
| Under 6f | 522 | 68 | 13% | +3.5 | 1 from 4 |
| 6f – 7f | 2,417 | 236 | 9.8% | +0.3 | 0 from 18 |
| 1m – 1m1f | 1,177 | 92 | 7.8% | −1.7 | 0 from 1 |
| 1m2f – 1m4f | 691 | 71 | 10.3% | +0.8 | — |
| 1m5f – 2m | 177 | 11 | 6.2% | −3.3 | — |
| 2m1f – 2m4f | 57 | 4 | 7% | −2.5 | — |
| 2m5f – 3m | 5 | 0 | 0% | −9.5 | — |
| Over 3m | 2 | 0 | 0% | −9.5 | — |
Flat and jumps together (all codes) · since Jan 2008 · as at 18 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast
Dam
1 sibling in the archive, 0 winners.
| Produce | Runs | Wins | Win trips | Best grade |
|---|---|---|---|---|
| Chelsea Believe (IRE) | 1 | 0 | — | — |
Record by conditions
| Going | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Standard (AW) | 10 | 0 | 0% | −10.00 |
| Good to Firm | 7 | 1 | 14% | −3.50 |
| Good to Soft | 6 | 0 | 0% | −6.00 |
| Class | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Class 6 | 13 | 1 | 8% | −9.50 |
| Class 5 | 5 | 0 | 0% | −5.00 |
| Class 3 | 3 | 0 | 0% | −3.00 |
| Class 4 | 2 | 0 | 0% | −2.00 |
| Course | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Newcastle (AW) | 4 | 0 | 0% | −4.00 |
| Southwell (AW) | 4 | 0 | 0% | −4.00 |
| York | 4 | 0 | 0% | −4.00 |
| Doncaster | 3 | 0 | 0% | −3.00 |
| Beverley | 2 | 0 | 0% | −2.00 |
| Chelmsford City (AW) | 1 | 0 | 0% | −1.00 |
| Wolverhampton (AW) | 1 | 0 | 0% | −1.00 |
| Thirsk | 1 | 0 | 0% | −1.00 |
| Ayr | 1 | 0 | 0% | −1.00 |
| Wetherby | 1 | 1 | 100% | +2.50 |
| Chester | 1 | 0 | 0% | −1.00 |
| Distance | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 6f – 7f | 18 | 0 | 0% | −18.00 |
| Under 6f | 4 | 1 | 25% | −0.50 |
| 1m – 1m1f | 1 | 0 | 0% | −1.00 |
| Jockey | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| Joanna Mason | 8 | 0 | 0% | −8.00 |
| Billy Garritty | 8 | 1 | 13% | −4.50 |
| Lewis Chalkley | 2 | 0 | 0% | −2.00 |
| Shane Gray | 2 | 0 | 0% | −2.00 |
| Tom Kiely-Marshall | 1 | 0 | 0% | −1.00 |
| Nathan Evans | 1 | 0 | 0% | −1.00 |
| Jack Garritty | 1 | 0 | 0% | −1.00 |
| Headgear | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| None | 21 | 1 | 5% | −17.50 |
| Visor | 1 | 0 | 0% | −1.00 |
| Hood | 1 | 0 | 0% | −1.00 |
| Season | Runs | Wins | SR | £1 |
|---|---|---|---|---|
| 2026 | 3 | 0 | 0% | −3.00 |
| 2025 | 14 | 1 | 7% | −10.50 |
| 2024 | 6 | 0 | 0% | −6.00 |
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
| Date | Course | Race | Pos | Btn | Wgt | OR | Spd | KTB | Jockey | SP |
|---|---|---|---|---|---|---|---|---|---|---|
| 04 Feb 26+5d | Newcastle (AW) | Midnite A Next Generation Betting App Handicap (Div 2) Held up towards the back - progress from over 2f out - drifted left when angling into contention inside the final furlong - lost ground towards the finish | 4/8 | 1 | 9-5 | 56 | 106A | 78A | Joanna Mason | 6/1 |
| 30 Jan 26+19d | Southwell (AW) | Midnite: Built For 2026 Not 2006 Handicap Settled midpack early - pushed along with 2f left - faded to finish 10th | 10/11 | 3¼ | 9-0 | 56 | 67A | 54A | Joanna Mason | 16/1 |
| 11 Jan 26+13d | Chelmsford City (AW) | Betfred Best Odds All Races Handicap Settled in the pack early - eased back and moved to the rail by halfway - pushed along a furlong out - stayed on without gaining extra ground close home | 7/10 | hd | 8-1 | 58 | 99A | 57A | Tom Kiely-Marshall | 14/1 |
| 29 Dec 25+38d | Newcastle (AW) | Create Your Bet Builders At Midnite Handicap Settled around midfield - asked for effort with 2f left and finding more - kept on into the final furlong but outpaced close home | 4/9 | ½ | 9-9 | 60 | 99A | 78A | Billy Garritty | 13/2 |
| 21 Nov 25+20d | Southwell (AW) | Midnite A Next Generation Betting App Handicap Pulled hard early - settled in the middle of the pack - pushed along 2f out - some late progress to finish 9th | 9/13 | shd | 8-13 | 62 | 65B | 63A | Lewis Chalkley | 22/1 |
| 01 Nov 25+16d | Newcastle (AW) | Make The Move To Midnite Handicap Sat close to leading duo early - dropped away and driven approaching 2f out - no extra final furlong finishing sixth | 6/9 | ¾ | 9-1 | 62 | 72A | 68A | Billy Garritty | 4/1 |
| 16 Oct 25+17d | Southwell (AW) | Free Tips Daily On attheraces.com Handicap Settled in the pack early - moved through to challenge with 2f left and hit the front inside the final furlong - overtaken close home and unable to fight back | 2/11 | 1¼ | 9-4 | 60 | 92A | 82A | Billy Garritty | 11/4F |
| 29 Sep 25+9d | Southwell (AW) | Sky Sports Racing Sky 415 Handicap Sluggish start - settled midfield - made progress and moved left approaching 2f out - pushed along 1f out - moved into second inside final furlong - stayed on to the line but unable to reel in winner | 2/12 | ¾ | 9-3 | 58 | 86A | 73A | Billy Garritty | 10/1 |
| 20 Sep 25+21d | Wolverhampton (AW) | Perfect Wills Legacy Trust Handicap Sluggish start - held up in the pack - closed late from a furlong out - moved into 4th late but couldn't threaten | 4/12 | 1 | 8-13 | 59 | 103A | 71A | Lewis Chalkley | 11/1 |
| 30 Aug 25+28d | Beverley | Constant Security Handicap Settled around midfield - improved into contention two out before drifting right approaching the furlong marker - lost momentum inside the closing stages to finish seventh | 7/11 | 1¼ | 9-3 | 61 | 77A | 70A | Joanna Mason | 11/1 |
| 02 Aug 25+12d | Thirsk | JW 4x4 Northallerton Handicap (Div 1) Settled in the pack early - pushed along with 2f left and squeezed for room a furlong out - stayed on at one speed to finish fifth | 5/10 | 2 | 9-7 | 62 | 95A | 72A | Joanna Mason | 11/1 |
| 21 Jul 25+16d | Ayr | Watch Racing TV Free For 31 Days Handicap Off the bridle from halfway - held up at the rear of the field in the middle of the track - no impression throughout to finish 5th | 5/7 | 1 | 9-8 | 64 | 72A | 68A | Joanna Mason | 10/3 |
| 05 Jul 25+20d | Beverley | George Kilburn Memorial Handicap Held a handy position early - urged into contention approaching 2f out - shared 3rd place inside the final furlong - kept on at one speed to finish 4th | 4/9 | 1¼ | 9-3 | 64 | 79A | 76A | Billy Garritty | 5/2F |
| 15 Jun 25+13d | Doncaster | Lauras Dance Academy Handicap Settled in the pack early - urged into 4th with a furlong to go - stayed on late but couldn't close the gap - finished 3rd beaten 2 lengths | 3/14 | ½ | 9-8 | 64 | 97C | 83A | Nathan Evans | 9/2 |
| 02 Jun 25+16d | Wetherby | Book Tickets Online At wetherbyracing.co.uk Handicap Held up towards back early - improved on outer approaching final 2f before hitting front inside last - kept finding more to score | 1/8 | 9-8 | 59 | 103A | 87A | Billy Garritty | 5/2F | |
| 17 May 25+21d | Doncaster | Free Tips Daily On attheraces.com Handicap (Rnd) Sat handily behind pace on a tight rein - went clear into command 6f from home - overtaken 2f out - lost ground quickly inside final furlong finishing 6th | 6/12 | 1 | 9-6 | 62 | 86A | 66A | Billy Garritty | 16/1 |
| 26 Apr 25+230d | Doncaster | Watch Unbridled On attheraces.com Handicap Held up towards the back - urged forward before 2f out with little effect - edged left under pressure - stayed on at one speed to finish 10th | 10/13 | hd | 9-9 | 65 | 79C | 69A | Jack Garritty | 11/2 |
| 08 Sep 24+35d | York | Irish Thoroughbred Marketing Nursery Held up in the pack - had to be niggled for effort and lacked room approaching 2f out - dropped away soon after - well held at the finish | 6/8 | 1¾ | 8-3 | 67 | 63A | 49A | Joanna Mason | 18/1 |
| 04 Aug 24+22d | Chester | Arthur May Memorial Nursery Handy early - driven for effort with 2f left - held level shape through closing stages - finished 7th | 7/8 | 1½ | 9-2 | 68 | 61B | 53A | Billy Garritty | 6/1 |
| 13 Jul 24+16d | York | John Smith's Nursery | 3/13 | 1½ | 8-12 | 67 | 55C | 84A | Joanna Mason | 4/1 |
| 27 Jun 24+12d | Newcastle (AW) | Coopers Marquees Novice Stakes (GBB Race) | 5/12 | 2½ | 9-7 | — | 78A | 71A | Shane Gray | 13/2 |
| 15 Jun 24+21d | York | Reg Griffin Appreciation Ebfstallions.Com Maiden Stakes (GBB Race) | 7/11 | 1¾ | 9-7 | — | 60A | 64A | Shane Gray | 11/1 |
| 25 May 24 | York | Reg Bond 'Always And Forever' EBF Restricted Novice Stakes (GBB Race) | 5/14 | hd | 9-3 | — | 72C | 92A | Joanna Mason | 40/1 |
Quick answers
- How many races has Atomic Mass (IRE) won?
- Atomic Mass (IRE) won 1 of 23 archived starts between 2024 and 2026, a strike rate of 4.3%. Placed 5 times in total (21.7% of starts).
- Who trains Atomic Mass (IRE)?
- Atomic Mass (IRE) is trained by Michael & David Easterby, who saddled the horse on its most recent run on 4 February 2026.
- Who is Atomic Mass (IRE)'s sire?
- Atomic Mass (IRE) is by Havana Gold (IRE) out of Fresh Snow (IRE), whose sire is Dark Angel.
- What going does Atomic Mass (IRE) prefer?
- Atomic Mass (IRE) has the best record on good to firm going: 1 win from 7 starts (14.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
- What is Atomic Mass (IRE)'s official rating?
- The most recent official rating on record is 56, from the run on 4 February 2026. The highest on record is 68.
- What is Atomic Mass (IRE)'s sire's record?
- Havana Gold (IRE)'s progeny in our archive have won 9.5% of 5,048 runs since Jan 2008 (402 horses), Flat and jumps together. Weakest on heavy going: 4.3% from 115. Strongest at trips under 6f (all codes): 13% from 522. Weakest over 1m5f – 2m (all codes): 6.2% from 177.
- Who are Atomic Mass (IRE)'s siblings?
- Out of Fresh Snow (IRE), Atomic Mass (IRE) has 1 other produce in our archive, 0 of them winners. As at Oct 2026.