
Almond Eye is a Japanese Thoroughbred racehorse. In 2018 she won the Oka Sho, Yushun Himba and Shuka Sho to complete the Japanese Fillies' Triple Crown. In November she ended an unbeaten season with a record-breaking win in the Japan Cup. On her first run of 2019 she won the Dubai Turf and went on to take the Tenno Sho in autumn. She holds a world record over 2,400 meters on turf. Almond Eye is the highest earning racehorse in the world among the racehorses born in 2015.

Alpha Centauri is an Irish Thoroughbred racehorse. In 2018 she recorded four consecutive Group 1 races, namely the Irish 1,000 Guineas, Coronation Stakes, Falmouth Stakes and Prix Jacques Le Marois.

Billesdon Brook is a British Thoroughbred racehorse. She was a useful and consistent juvenile in 2017, winning three races including the Prestige Stakes and being placed on four of her other five starts. In the following spring she ran fourth on her seasonal debut and then recorded a 66/1 upset win in the 1000 Guineas. She failed to win again that year but returned to form in 2019 to win the Queen Charlotte Fillies' Stakes, Oak Tree Stakes and Sun Chariot Stakes.

Blast Onepiece, is a Japanese Thoroughbred racehorse. After winning his only start as a two-year-old he improved to become the best colt of his generation in Japan in the following year. He recorded Grade 3 victories in the Mainichi Hai and the Niigata Kinen before ending his season with a win over a top-class field in the Arima Kinen. As a four-year-old he won the Sapporo Kinen in August at Sapporo Kinen

Catholic Boy, is an American Thoroughbred racehorse who has won major races on both turf and dirt. As a juvenile in 2017 he won three of his four races including the With Anticipation Stakes and the Remsen Stakes. In the following year he was one of the best colts of his generation in America, winning the Pennine Ridge Stakes and Belmont Derby on turf before switching to dirt to take the Travers Stakes. As a four-year-old in 2019 he won the Dixie Stakes.

Clemmie is an Irish Thoroughbred racehorse. As a two-year-old in 2017 she was beaten in her first two races but then won the Grangecon Stud Stakes, Duchess of Cambridge Stakes and Cheveley Park Stakes, ending the year as the highest-rated juvenile filly in Europe. She failed to win in six starts in the following year and was retired at the end of the season.

Cross Counter is a Thoroughbred racehorse best known for winning the 2018 Melbourne Cup. After winning two minor races he was gelded before returning in the summer of 2018 to win two more races including the Gordon Stakes as well as finishing second in the Great Voltigeur Stakes and fourth in the King George V Stakes. In autumn he was sent to Australia and on 6 November he became the first British-trained horse to win the Melbourne Cup. In 2019 he won the Dubai Gold Cup.

Danon Premium, is a Japanese Thoroughbred racehorse. He was the top-rated juvenile in Japan in 2017 when he was undefeated in three races including the Saudi Arabia Royal Cup and the Asahi Hai Futurity Stakes. In the following year he won the Yayoi Sho but finished sixth when favourite for the Tokyo Yushun. As a four-year-old he won the Kinko Sho and Yomiuri Milers Cup as well as finishing second place in both the Tenno Sho and the Mile Championship.

Epoca d'Oro, is a Japanese Thoroughbred racehorse. After finishing third on his only appearance as a two-year-old in 2017 he showed steady improvement in the following spring, winning two minor races and finishing second in the Spring Stakes before recording his biggest success in the Satsuki Sho. He went on to finish runner-up in the Tokyo Yushun but failed to reproduce his best form in two subsequent starts that year.

Eqtidaar, is an Irish-bred, British-trained Thoroughbred racehorse. He showed promise as two-year-old when he won a maiden race on his debut and then finished fourth in the Sirenia Stakes. In the following year he was beaten in the Pavilion Stakes and the Carnarvon Stakes before recording his biggest win in the Commonwealth Cup. In two subsequent races that year he ran poorly in the July Cup and the Haydock Sprint Cup.

Expert Eye is a British-bred Thoroughbred racehorse. He was one of the most promising two-year-olds of his generation in 2017 when he won the Vintage Stakes but disappointed on his final start in the Dewhurst Stakes. In 2018 he won the Jersey Stakes and City of York Stakes and was placed in the Greenham Stakes, Sussex Stakes and Prix du Moulin before recording his biggest win in the Breeders' Cup Mile.

Fierement, is a Japanese Thoroughbred racehorse. Unraced as a juvenile he won his first two starts as a three-year-old before running second in the Radio Nikkei Sho and the winning the Grade 1 Kikuka Sho on his final appearance of the year. In the following spring he finished runner-up in the American Jockey Club Cup before recording his second Grade 1 success in the spring edition of the Tenno Sho.

Forever Together is an Irish Thoroughbred racehorse best known for winning the 2018 Epsom Oaks.

Ghaiyyath is an Irish-bred, British-trained Thoroughbred racehorse. He showed very promising form as a juvenile in 2017 when he won two of his three races including the Autumn Stakes. Training problems restricted him to only one start in 2018, a victory in the Prix du Prince d'Orange. In the spring of 2019 he won the Prix d'Harcourt and ran third in the Prix Ganay before returning in autumn to win the Grosser Preis von Baden by fourteen lengths. In 2020 he added victories in the Dubai Millennium Stakes, Coronation Cup, Eclipse Stakes and International Stakes.

Glory Vase, is a Japanese Thoroughbred racehorse. He showed promising form in his first two seasons of racing, winning two minor races and finishing fifth in the Kikuka Sho. As a four-year-old in 2019 he emerged as a world-class performer, winning the Nikkei Shinshun Hai and running second in the spring edition of the Tenno Sho before recording his biggest victory in the Hong Kong Vase.

Good Magic is a retired American Thoroughbred racehorse who became the first horse to ever break his maiden at the Breeders' Cup when he won the 2017 Breeders' Cup Juvenile. He finished second in his other two starts that year, including the Champagne Stakes, and was named the American Champion Two-Year-Old Male Horse. At age three, he won the Blue Grass Stakes and Haskell Invitational and finished second to Justify in the 2018 Kentucky Derby.

Gronkowski is a Thoroughbred racehorse foaled in 2015. He is named after American football tight end Rob Gronkowski, who is a minority owner of the horse. He raced several times in the United Kingdom, winning the Burradon Stakes, before taking part in the 2018 Belmont Stakes and finishing second. At the Belmont, he had odds of 69:1 to win. He was originally going to race in the 2018 Kentucky Derby, but pulled out due to a fever.

Happily is an Irish Thoroughbred racehorse. As a two-year-old in 2017 she was one of best of her generation in Europe, winning four of her seven races including two at Group 1 level. After finishing unplaced on her debut she won a maiden race and the Group 3 Silver Flash Stakes before running second to her stablemate Magical in the Debutante Stakes. She reversed the form to beat Magical in the Moyglare Stud Stakes and then defeated male opposition to take the Prix Jean-Luc Lagardère. At the end of the season she was voted Cartier Champion Two-year-old Filly. In the following year she was placed in the 1000 Guineas, Irish 1,000 Guineas and Sun Chariot Stakes.

Indy Champ is a Japanese Thoroughbred racehorse. After winning his only start as a juvenile in 2017 he showed good form in the following year when he won three races and finished third in the Mainichi Hai. He emerged as a top-class performer in 2019 winning the Tokyo Shimbun Hai in February and going to take both of Japan's open age Grade 1 mile races, the Yasuda Kinen and the Mile Championship

Justify is a retired American Thoroughbred racehorse who is the 13th and most recent winner of the American Triple Crown, accomplishing the feat by winning the Kentucky Derby, Preakness Stakes, and Belmont Stakes in 2018.

Kew Gardens is an Irish Thoroughbred racehorse. He showed considerable promise as a juvenile in 2017 when he won two of his five races including the Zetland Stakes. In the following year he developed into a top class stayer, taking the Queen's Vase, Grand Prix de Paris and St Leger. As a four-year-old he added another major win as he took the British Champions Long Distance Cup as well as finishing second in the Coronation Cup and the Irish St. Leger.

Laurens is a French-bred British-trained Thoroughbred racehorse. In a career running from July 2017 to October 2019 she ran 17 times, winning eight races, including six at the highest Group 1 level. In 2017 she won a minor event on her racecourse debut and then finished second to Polydream in the Prix du Calvados before her victories in the May Hill Stakes and Fillies' Mile. In the following year she ran second to Billesdon Brook in the 1000 Guineas and then embarked on a successful campaign in her native France, taking both the Prix Saint-Alary and the Prix de Diane. When tried over one and a half miles she failed to stay the distance in the Yorkshire Oaks but when brought back to one mile she upset Alpha Centauri in the Matron Stakes and then added a fifth Group 1 success when taking the Sun Chariot Stakes. In 2019 she continued to compete at the highest level, adding a further Group 1 win in France in the Prix Rothschild before being retired at the end of the season.

Lucky Lilac is a Japanese Thoroughbred racehorse. As a two-year-old in 2017 she was undefeated in three races including the Artemis Stakes and Hanshin Juvenile Fillies and took the JRA Award for Best Two-Year-Old Filly. In the following year she won the Tulip Sho and was placed in both the Oka Sho and the Yushun Himba. In 2019 she won the Queen Elizabeth II Cup and finished second in the Hong Kong Vase.

Magical is an Irish Thoroughbred racehorse who excelled over middle distances and was rated in the top twenty racehorses in the world in 2018 and 2019. She showed considerable ability as a juvenile in 2017, winning the Debutante Stakes and finishing second in the Moyglare Stud Stakes as well as running fourth in both the Prix Marcel Boussac and the Fillies' Mile. In the following year she won the Kilboy Estate Stakes but did not produce her best form until autumn when she took the British Champions Fillies and Mares Stakes and was narrowly beaten in the Breeders' Cup Turf. In 2019 she won the Alleged Stakes, Mooresbridge Stakes, Tattersalls Gold Cup, Irish Champion Stakes and Champion Stakes as well as finishing second in the Prince of Wales's Stakes, Eclipse Stakes and Yorkshire Oaks.

Magnum Moon was an American Thoroughbred racehorse. Unraced as a two-year-old he won his first four starts of 2018, including the Rebel Stakes and the Arkansas Derby to establish himself as a leading contender for the 2018 Kentucky Derby. He suffered his sole defeat in that race, then was retired after injuring himself in a June workout.

Masar is an Irish-bred Thoroughbred racehorse, best known for winning the 2018 Epsom Derby. He was highly tried as a two-year-old, finishing third in the Chesham Stakes and winning the Solario Stakes before contesting major races in France and the United States. After racing unsuccessfully in Dubai he returned to Europe in the spring of 2018 to win the Craven Stakes and then ran third when favourite for the 2000 Guineas. After winning the Derby in June he had injury problems and was off the course for over a year before returning as four-year-old in 2019. He failed to recover his form in two starts and was retired from racing.

Mendelssohn is an American-bred Thoroughbred racehorse, trained by Aidan O'Brien, who won the Breeders' Cup Juvenile Turf in 2017. In March 2018, he won the UAE Derby by over 18 lengths, making him one of the favorites for the 2018 Kentucky Derby. After he finished last in that race, Mendelssohn finished third in the Jim Dandy and second in the Travers Stakes, taking his career earnings over $2 million.

Midnight Bisou is a retired American Thoroughbred racehorse who was the Champion Older Female Horse of 2019 after being one of the top-ranked fillies of 2018. At age three, she won five stakes races including the Santa Anita Oaks, Mother Goose and Cotillion Stakes. She was also third in both the Kentucky Oaks and Breeders' Cup Distaff. In 2019 at age four, she won seven straight stakes races including the Grade I Apple Blossom, Ogden Phipps, and Personal Ensign.

Monomoy Girl is an American Thoroughbred racehorse who was the American Champion Three-Year-Old Filly of 2018. She showed very promising form as a juvenile in 2017 when she won her first three races before being narrowly beaten in the Golden Rod Stakes. In the following spring she took the Rachel Alexandra Stakes and the Ashland Stakes before winning the Kentucky Oaks, the filly equivalent of the Kentucky Derby. She followed this up with wins in the Acorn Stakes and Coaching Club American Oaks, but was disqualified to second for interference in the Cotillion Stakes. She then rebounded to win the Breeders' Cup Distaff while facing older horses for the first time.

Old Persian, is a British-bred Thoroughbred racehorse who has raced in England, Ireland, the United Arab Emirates, Germany, Canada and the United States. He showed promise as a two-year-old in 2017 when he won two minor races from four starts. In the following year he showed top-class form over middle distances, winning the Fairway Stakes, King Edward VII Stakes and Great Voltigeur Stakes as well as finishing second in the Newmarket Stakes and fifth in the St Leger. He improved again as a four-year-old, winning the Dubai City of Gold, Dubai Sheema Classic and Northern Dancer Turf Stakes.

Roaring Lion was an American-bred, British-trained Thoroughbred racehorse. He was the top-rated British-trained two-year-old of 2017, when he won three races including the Royal Lodge Stakes and suffered his only defeat when narrowly beaten by Saxon Warrior in the Racing Post Trophy. In the following year he won the Dante Stakes, the Eclipse Stakes, International Stakes, Irish Champion Stakes and Queen Elizabeth II Stakes as well as running third in the Craven Stakes, fifth in the 2000 Guineas and third in the Epsom Derby. He was euthanised following horse colic in 2019 at the age of four.

Sands of Mali, is a French-bred, British-trained Thoroughbred racehorse. In a career which ran from July 2017 to July 2020 he ran eighteen times and won five of his races. In 2017 he was one of the best two-year-old colts in Europe, winning two races including the Gimcrack Stakes. In the following spring he established himself as a top class sprinter, taking the Prix Sigy and Sandy Lane Stakes before being narrowly defeated in the Commonwealth Cup. He ran poorly in late summer, but returned to form in autumn to record his biggest win in the British Champions Sprint Stakes. He failed to win in six races in 2019 and 2020 and was retired to stud in August 2020.

Saxon Warrior is a Japanese-bred, Irish-trained Thoroughbred racehorse. As a two-year-old in 2017 he was one of the best colts of his generation in Europe, winning all three of his races including the Beresford Stakes and the Racing Post Trophy. On his three-year-old debut the colt won the 2000 Guineas before finishing fourth when odds-on favourite for the 2018 Epsom Derby. He went on to be placed in the Irish Derby, Eclipse Stakes and Irish Champion Stakes.

Sea of Class was an Irish-bred British-trained Thoroughbred racehorse. She was unraced as a juvenile and beaten on her three-year-old debut, but then made rapid progress, winning the Fillies' Trial Stakes in May and the Abingdon Stakes in June. When stepped up to Group 1 class she defeated top-class fields to take the Irish Oaks in July and the Yorkshire Oaks in August before being narrowly beaten in the Prix de l'Arc de Triomphe. Initially it was believed that Sea of Class died from colic, the supposed colic subsequently proved to be lymphoma, and an initial growth was removed. A further cancerous growth was discovered 19 days after the original operation; the discovery of the latter resulted in Sea of Class being euthanized on July 22, 2019.

U S Navy Flag is an American-bred, Irish-trained Thoroughbred racehorse. In 2017 he became the first horse in 35 years to win both the Middle Park Stakes and the Dewhurst Stakes. As two-year-old he was beaten in his first four racecourse appearances, including the Coventry Stakes before winning a maiden race in July. He then finished second in the July Stakes and fourth in the Phoenix Stakes before recording his first significant win in the Group 3 Round Tower Stakes. He won the Middle Park Stakes at Newmarket Racecourse on 30 September and returned to the same track two weeks later to follow up in the Dewhurst Stakes. As a three-year-old in 2018 he ran in several major mile races without success before dropping back to sprint distances to win the July Cup.

Wagnerian, is a Japanese Thoroughbred racehorse. He was one of the best two-year-olds in Japan in 2017 when he was unbeaten in three races including the Grade 3 Tokyo Sports Hai Nisai Stakes. In the following spring he was defeated in his first two starts of the year but then recorded his biggest win in the Tokyo Yushun. On his only subsequent appearance of 2018 he won the Kobe Shimbun Hai. Wagnerian failed to win in 2019 but finished third in both the Osaka Hai and the Japan Cup.

Wild Illusion is a British Thoroughbred racehorse. She was the highest-rated horse of her age and sex trained in Britain in 2017 when she won two of her three races including the Group 1 Prix Marcel Boussac. In the following year she finished fourth in the 1000 Guineas and second in the Epsom Oaks before winning the Nassau Stakes and the Prix de l'Opéra.

Without Parole, is a British Thoroughbred racehorse. After showing promise when winning his only start as a two-year-old he progressed in the following spring, following a win in a minor race by taking the Heron Stakes and then recording his biggest win in the St James's Palace Stakes. He finished unplaced in his three subsequent starts that year.

Wonder Gadot is a Canadian Thoroughbred racehorse best known for winning the Queen's Plate and Prince of Wales Stakes, the first two legs of the Canadian Triple Crown, in 2018. As a two-year-old, she was named the Canadian Champion Two-Year-Old Filly after winning the Mazarine and Demoiselle Stakes. At age three, in addition to beating the colts twice in Canada, she was second in the Grade I Kentucky Oaks to Monomoy Girl. She was named the 2018 Canadian Horse of the Year and Champion Three-Year-Old Filly.